M.C.Q (1 Marks)

MCQ 11 Mark

An important criterion for modern day classification is:

A
Resemblances in Morphology.
✓
Anatomical and physiological traits.
C
Breeding habits.
D
Presence or absence of notochord.

Answer

Correct option: B.

Anatomical and physiological traits.

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MCQ 21 Mark

Which of the following is an indicator of air pollution?

A
Mycorrhiza.
B
Agaricus.
✓
Lichens.
D
Common mushrooms.

Answer

Correct option: C.

Lichens.

Lichens are the indicators of air pollution. Lichens are the association between fungi and algae. They do not grow in polluted areas.

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MCQ 31 Mark

Viruses are non$-$cellular organisms but replicate themselves once they infect the host cell. To which of the following kingdom do viruses belong to?

A
Monera.
B
Protista.
C
Fungi.
✓
None of the above.

Answer

Correct option: D.

None of the above.

Since viruses are considered as borderline case between living and non$-$living things; no kingdom has been specified for them.

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MCQ 41 Mark

Reverse transcriptase is:

A
$\text{RNA}$ dependent $\text{RNA}$ polymerase.
B
$\text{DNA}$ dependent $\text{RNA}$ polymerase.
C
$\text{DNA}$ dependent $\text{DNA}$ polymerase.
✓
$\text{RNA}$ dependent $\text{DNA}$ polymerase.

Answer

Correct option: D.

$\text{RNA}$ dependent $\text{DNA}$ polymerase.

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MCQ 51 Mark

Which amongst kingdom animalia has become recently extinct?

A
Snow leopard.
B
Indian macaque.
✓
Cheetah.
D
Tiger.

Answer

Correct option: C.

Cheetah.

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MCQ 61 Mark

Potato spindle tuber disease is caused by:

A
Phycobionts.
B
Virus.
C
Bacteria.
✓
Viroids.

Answer

Correct option: D.

Viroids.

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MCQ 71 Mark

Rhizopus belongs to:

✓
Zygomycetes
B
Basidiomycetes
C
Ascomycetes
D
Deuteromycetes

Answer

Correct option: A.

Zygomycetes

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MCQ 81 Mark

Most of the lichens consist of:

A
Blue$-$green algae and Basidomycetes.
✓
Blue$-$green algae and Ascomycetes.
C
Red algae and Ascomycetes.
D
Brown algae and Phycomycetes.

Answer

Correct option: B.

Blue$-$green algae and Ascomycetes.

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MCQ 91 Mark

In prokaryotes, the genetic material is:

✓
Linear $\text{DNA}$ without histones.
B
Circular $\text{DNA}$ with histones.
C
Circular $\text{DNA}$ without histones.
D
Linear $\text{DNA}$ with histones.

Answer

Correct option: A.

Linear $\text{DNA}$ without histones.

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MCQ 101 Mark

Which of the following is used in biochemical and genetic work?

A
Claviceps.
B
Aspergillus.
✓
Neurospora.
D
Mucor.

Answer

Correct option: C.

Neurospora.

Neurospora is used in biochemical and genetic work, it belongs to class Ascomycetes.

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MCQ 111 Mark

Which is the correct word for relationship between algae and fungi in lichens?

A
Parasitism.
✓
Symbiosis.
C
Commensals.
D
Pathogens.

Answer

Correct option: B.

Symbiosis.

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MCQ 121 Mark

A dikaryon is formed when.

A
Meiosis is arrested.
B
The two haploid cells do not fuse immediately.
C
Cytoplasm does not fuse.
✓
None of the above.

Answer

Correct option: D.

None of the above.

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MCQ 131 Mark

All eukaryotic unicellular organisms belong to:

A
Monera.
B
Protista.
✓
Fungi.
D
Bacteria.

Answer

Correct option: C.

Fungi.

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MCQ 141 Mark

Absorptive heterotrophic nutrition is exhibited by:

A
Algae
✓
Fungi.
C
Bryophytes.
D
Pteridophytes.

Answer

Correct option: B.

Fungi.

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MCQ 151 Mark

What is true about Trypanosoma?

✓
Polymorphic.
B
Monogenetic.
C
Facultative parasite.
D
Non$-$pathogenic.

Answer

Correct option: A.

Polymorphic.

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MCQ 161 Mark

Bacteria that live in hot springs are called:

A
Halophiles.
✓
Thermoacidophiles.
C
Methanogens.
D
None of the above.

Answer

Correct option: B.

Thermoacidophiles.

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MCQ 171 Mark

Which one of the following character was not used by $R.H.$ Whittaker for biological classification?

✓
Physiological characters.
B
Thallus organisation.
C
Phylogenetic relationships.
D
Cell structure.

Answer

Correct option: A.

Physiological characters.

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MCQ 181 Mark

Nuclear dimorphism is shown by:

A
Plasmodium.
✓
Paramecium.
C
Amoeba.
D
Trypanosoma.

Answer

Correct option: B.

Paramecium.

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MCQ 191 Mark

Which one of the following micro$-$organisms is used for production of citric acid in industries?

A
Penicillium citrinum.
✓
Aspergillus niger.
C
Rhizopus nigricans.
D
Lactobacillus bulgaricus.

Answer

Correct option: B.

Aspergillus niger.

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MCQ 201 Mark

Which of the following is true for viruses?

A
They invariably contain $\text{DNA}$.
✓
They multiply only inside the host cell.
C
They occur only inside bacteria.
D
Their genetic material is $\text{RNA}$.

Answer

Correct option: B.

They multiply only inside the host cell.

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MCQ 211 Mark

Genetic information in Paramecium is contained in:

✓
Micronucleus.
B
Macronucleus.
C
Both $(a)\ \& \ (b).$
D
Mitochondria.

Answer

Correct option: A.

Micronucleus.

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MCQ 221 Mark

Taxonomy without phylogeny is similar to bones without flesh” is the statement of:

A
Oswald Tippo.
B
John Hutchinson.
✓
Takhtajan.
D
Bentham and Hooker.

Answer

Correct option: C.

Takhtajan.

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MCQ 231 Mark

Phylogenetic classification is based on:

A
Utilitarian system.
B
Habits.
C
Overall similarities.
✓
Common evolutionary descent.

Answer

Correct option: D.

Common evolutionary descent.

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MCQ 241 Mark

A non$-$photosynthetic aerobic nitrogen fixing soil bacterium is:

A
Rhizobium.
B
Clostridium.
✓
Azotobacter.
D
Klebsiella.

Answer

Correct option: C.

Azotobacter.

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MCQ 251 Mark

Plant decomposers are:

✓
Monera and Fungi.
B
Fungi and Plants.
C
Protista and Animalia.
D
Animalia and Monera .

Answer

Correct option: A.

Monera and Fungi.

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MCQ 261 Mark

A spore producing plant is $.........$

A
Rose
✓
Bread mould
C
Potato
D
Ginger

Answer

Correct option: B.

Bread mould

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MCQ 271 Mark

If two or more species occupy overlapping areas, they are:

A
Sibling.
B
Allochronic.
C
Keystone.
✓
Sympatric.

Answer

Correct option: D.

Sympatric.

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MCQ 281 Mark

Match the columns:
Basidiomycetes $– A$. Agaricus.
Ascomycetes $– B$. Albugo.
Phycomycetes $– C$. Trichoderma.
Deuteromycetes $– D$. Saccharomyces.

A
$\text{1-D, 2-A, 3-B, 4-C.}$
✓
$\text{1-A, 2-D, 3-B, 4-C.}$
C
$\text{1-A, 2-B, 3-D, 4-C.}$
D
$\text{1-C, 2-D, 3-A, 4-B.}$

Answer

Correct option: B.

$\text{1-A, 2-D, 3-B, 4-C.}$

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MCQ 291 Mark

Cauliflower mosaic virus contains:

A
$\text{ssRNA.}$
B
$\text{dsRNA.}$
✓
$\text{dsDNA}$.
D
$\text{dsDNA.}$

Answer

Correct option: C.

$\text{dsDNA}$.

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MCQ 301 Mark

A taxon is:

A
A group of related families.
B
A group of related species.
C
A type of living organisms.
✓
A taxonomic group of any ranking.

Answer

Correct option: D.

A taxonomic group of any ranking.

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MCQ 311 Mark

Organisms living in salty areas are called as.

A
Methanogens.
✓
Halophiles.
C
Heliophytes.
D
Thermoacidophiles.

Answer

Correct option: B.

Halophiles.

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MCQ 321 Mark

Associations between Mycobiont and Phycobiont are found in.

A
Mycorrhiza.
B
Root.
✓
Lichens.
D
$\text{BGA}.$

Answer

Correct option: C.

Lichens.

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MCQ 331 Mark

Proteins of capsomeres are made up of:

A
Nucleic acids
B
Carbohydrates
C
Fats
✓
Amino acids

Answer

Correct option: D.

Amino acids

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MCQ 341 Mark

Binomial Nomenclature was given by:

A
Aristotle.
✓
Linnaeus.
C
John Ray.
D
Huxley.

Answer

Correct option: B.

Linnaeus.

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MCQ 351 Mark

African sleeping sickness is due to:

A
Plasmodium vivax transmitted by tse$-$tse fly.
B
Trypanosoma lewsii transmitted by bed bug.
✓
Trypanosoma gambiense transmitted by Glossina palpalis.
D
Entamoeba gingivalis spread by house fly.

Answer

Correct option: C.

Trypanosoma gambiense transmitted by Glossina palpalis.

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MCQ 361 Mark

Which of the following is not correctly matched?

A
Late blight of potato $-$ Phytophthora infestans.
✓
Covered smut of barley $-$ Ustilago nuda.
C
Root knot disease $-$ Meloidogyne javanica.
D
Smut of bajra $-$ Tolysporium penicillariae

Answer

Correct option: B.

Covered smut of barley $-$ Ustilago nuda.

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MCQ 371 Mark

In bacterial chromosomes, the nucleic acid polymers are:

A
Linear $\text{DNA}$ molecule.
✓
Circular $\text{DNA}$ molecule.
C
Of two types$\text{-DNA}$ and $\text{RNA}$.
D
Linear $\text{RNA}$ molecule.

Answer

Correct option: B.

Circular $\text{DNA}$ molecule.

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MCQ 381 Mark

A system of classification in which a large number of traits are considered, is:

A
Artificial system.
B
Synthetic system.
✓
Natural system.
D
Phylogenetic system.

Answer

Correct option: C.

Natural system.

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MCQ 391 Mark

Choose the correct pair.

A
Parasitic fungi $–$ feeds on plants and animals.
B
Saprotrophic fungi $–$ feeds on dead and decaying organic matter.
C
Symbiotic fungi $–$ mycorrhiza.
✓
All of the above are true.

Answer

Correct option: D.

All of the above are true.

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MCQ 401 Mark

Influenza virus has:

A
$\text{DNA}.$
✓
$\text{RNA}.$
C
Both $(a)$ and $(b).$
D
Only proteins and no nucleic acids.

Answer

Correct option: B.

$\text{RNA}.$

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MCQ 411 Mark

Rickettsiae constitute a group under:

✓
Bacteria.
B
Viruses.
C
Independent group between bacteria and viruses.
D
Fungi.

Answer

Correct option: A.

Bacteria.

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MCQ 421 Mark

Tobacco mosaic virus is a tubular filament of size:

A
$700 \times 30\ nm.$
B
$300 \times 10\ nm.$
C
$300 \times 5\ nm.$
✓
$300 \times 18\ nm.$

Answer

Correct option: D.

$300 \times 18\ nm.$

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MCQ 431 Mark

On the basis of attack of host, viruses are classified into:

A
Two types
✓
Three types
C
Four types
D
Five types

Answer

Correct option: B.

Three types

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MCQ 441 Mark

The five kingdom classification was proposed by.

✓
$R.H.$ Whittaker.
B
$C.$Linnaeus.
C
$A.$ Roxberg.
D
Virchow.

Answer

Correct option: A.

$R.H.$ Whittaker.

$R. H$. Whittaker proposed five kingdom classification in $1959$. Monera, Protista, Fungi, Plantae and Animalia are the five kingdoms according to $R. H$. Whittaker.

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MCQ 451 Mark

Adhesive pad of fungi penetrates the host with the help of:

✓
Mechanical pressure and enzymes.
B
Hooks and suckers.
C
Softening by enzymes.
D
Only by mechanical pressure.

Answer

Correct option: A.

Mechanical pressure and enzymes.

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MCQ 461 Mark

During the formation of bread it becomes porous due to release of $CO_2$ by the action of:

✓
Yeast.
B
Bacteria.
C
Virus.
D
Protozoans.

Answer

Correct option: A.

Yeast.

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MCQ 471 Mark

Members of phycomycetes are found in.

Aquatic habitats.
On decaying wood.
Moist and damp places.
As obligate parasites on plants.

Choose from the following options.

A
None of the above.
B
$i$ and $iv$
C
$ii$ and $iii$
✓
All of the above.

Answer

Correct option: D.

All of the above.

Phycomycetes is the group of fungi which is characterized by aseptate and coenocytic mycelium. They can live in a wide variety of habitat. They can be aquatic or saprotrophic or parasitic or could be living in moist and damp places. Some examples of phycomycetes are Rhizopns $($black bread mould$)$, Mucor $($dung mould$)$, Albugo $($parasitic fungi$)$.

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MCQ 481 Mark

The closely related morphologically similar sympatric populations, but reproductively isolated, are designated as:

A
Clines.
B
Demes.
C
Demes.
✓
Sibling species.

Answer

Correct option: D.

Sibling species.

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MCQ 491 Mark

Ustilago caused plant diseases are called smuts because:

A
They parasitise cereals.
B
Mycelium is black.
✓
They develop sooty masses of spores.
D
Affected parts become completely black.

Answer

Correct option: C.

They develop sooty masses of spores.

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MCQ 501 Mark

Yeast$-$Saccharomyces cerevisiae is used in the industrial production of:

A
Citric acid.
B
Tetracycline.
✓
Ethanol.
D
Butanol.

Answer

Correct option: C.

Ethanol.

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MCQ 511 Mark

Which of the following can be made into crystal?

A
Bacterium
B
Amoeba
✓
Virus
D
None of these

Answer

Correct option: C.

Virus

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MCQ 521 Mark

Difference between Virus and Viroid is.

✓
Absence of protein coat in viroid but present in virus.
B
Presence of low molecular weight $\text{RNA}$ in virus but absent in viroid.
C
Both $a$ and $b.$
D
None of the above.

Answer

Correct option: A.

Absence of protein coat in viroid but present in virus.

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MCQ 531 Mark

Puccinia forms:

A
Uredia and aecia on wheat leaves.
✓
Uredia and telia on wheat leaves.
C
Uredia and aecia on barbery leaves.
D
Uredia and pycnia on barbery leaves

Answer

Correct option: B.

Uredia and telia on wheat leaves.

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MCQ 541 Mark

Quinine is obtained from:

✓
Puccinia.
B
Neurospora.
C
Gonyaulax.
D
Cinchona.

Answer

Correct option: A.

Puccinia.

Quinine is obtained from Cinchona officinalis.

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MCQ 551 Mark

With respect to fungal sexual cycle, choose the correct sequence of events:

A
Karyogamy, Plasmogamy and Meiosis.
B
Meiosis, Plasmogamy and Karyogamy.
C
Plasmogamy, Karyogamy and Meiosis.
✓
Meiosis, Karyogamy and Plasmogamy.

Answer

Correct option: D.

Meiosis, Karyogamy and Plasmogamy.

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MCQ 561 Mark

Which one belongs to Monera?

A
Amoeba.
✓
Escherichia.
C
Gelidium.
D
Spirogyra.

Answer

Correct option: B.

Escherichia.

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MCQ 571 Mark

Viruses that infect bacteria, multiply and cause their lysis, are called:

A
Lysozymes.
✓
Lytic.
C
Lipolytic.
D
Lysogenic.

Answer

Correct option: B.

Lytic.

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MCQ 581 Mark

Which one of the following statements about viruses is correct?

A
Nucleic acid of viruses is known as capsid.
B
Viruses possess their own metabolic system.
C
All viruses contain both $\text{RNA}$ and $\text{DNA}.$
✓
Viruses are obligate parasites.

Answer

Correct option: D.

Viruses are obligate parasites.

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MCQ 591 Mark

With respect to fungal sexual cycle, choose the correct sequence of events.

A
Karyogamy, Plasmogamy and Meiosis.
B
Meiosis, Plasmogamy and Karyogamy.
✓
Plasmogamy, Karyogamy and Meiosis.
D
Meiosis, Karyogamy and Plasmogamy.

Answer

Correct option: C.

Plasmogamy, Karyogamy and Meiosis.

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MCQ 601 Mark

Basic unit or smallest taxon of taxonomy/ classification is:

✓
Species.
B
Kingdom.
C
Family.
D
Variety

Answer

Correct option: A.

Species.

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MCQ 611 Mark

The vector for sleeping sickness is:

A
House fly.
✓
Tse$-$tse fly.
C
Sand fly.
D
Fruit fly.

Answer

Correct option: B.

Tse$-$tse fly.

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MCQ 621 Mark

Sequence of taxonomic categories is:

A
Class$-$phylum$-$tribe$-$order$-$family$-$genusspecies
B
Division$-$class$-$family$-$tribe$-$order$-$genusspecies
✓
Division$-$class$-$order$-$family$-$tribe$-$genusspecies.
D
Phylum$-$order$-$class$-$tribe$-$family$-$genusspecies.

Answer

Correct option: C.

Division$-$class$-$order$-$family$-$tribe$-$genusspecies.

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MCQ 631 Mark

Comma’ shaped bacteria are known as:

A
Spiral.
✓
Vibrio.
C
Spirillum.
D
Coccus.

Answer

Correct option: B.

Vibrio.

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MCQ 641 Mark

In fungi stored food material is:

✓
Glycogen.
B
Starch.
C
Sucrose.
D
Glucose.

Answer

Correct option: A.

Glycogen.

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MCQ 651 Mark

Name the organisms which do not derive energy directly or indirectly from sun:

✓
Chemosynthetic bacteria.
B
Pathogenic bacteria.
C
Symbiotic bacteria.
D
Mould.

Answer

Correct option: A.

Chemosynthetic bacteria.

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MCQ 661 Mark

If all ponds and puddles are destroyed, the organism likely to be destroyed is:

A
Leishmania.
B
Trypanosoma.
C
Ascaris.
✓
Plasmodium.

Answer

Correct option: D.

Plasmodium.

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MCQ 671 Mark

Contagium vivum fluidum was proposed by fungal:

A
$D.J.$ Ivanowsky.
✓
$M.W.$ Beijerinek.
C
Stanley $S.$
D
Robert Hooke.

Answer

Correct option: B.

$M.W.$ Beijerinek.

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MCQ 681 Mark

Malaria fever coincides with liberation of:

A
Cryptomerozoites.
B
Metacryptomerozoites.
✓
Merozoites.
D
Trophozoites.

Answer

Correct option: C.

Merozoites.

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MCQ 691 Mark

A system of classification in which a large number of traits are considered, is:

A
Synthetic system.
✓
Natural system.
C
Artificial system.
D
Phylogenetic system.

Answer

Correct option: B.

Natural system.

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MCQ 701 Mark

The chemical compounds produced by the host plants to protect themselves against fungal infection is:

A
Phytotoxin.
B
Pathogen.
✓
Phytoalexins.
D
Hormone.

Answer

Correct option: C.

Phytoalexins.

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MCQ 711 Mark

Which of the following is a fungal infection?

✓
Ringworm.
B
$\text{AIDS}.$
C
Cholera.
D
Typhoid.

Answer

Correct option: A.

Ringworm.

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MCQ 721 Mark

Food is stored in Rhizopus$/$ Mucor as:

A
Protein and steriods
B
Sugar and oil
C
Protein and starch
✓
Glycogen and oil

Answer

Correct option: D.

Glycogen and oil

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MCQ 731 Mark

Linnaeus evolved a system of nomenclature called:

A
Mononomial.
B
Vernacular.
✓
Binomial.
D
Polynomial.

Answer

Correct option: C.

Binomial.

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MCQ 741 Mark

Who discovered Plasmodium in $\text{RBC}$ of human beings?

A
Ronald Ross.
B
Mendel.
✓
Laveran.
D
Stephen.

Answer

Correct option: C.

Laveran.

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MCQ 751 Mark

Trypanosoma causes:

A
Dysentry.
B
Mumps.
✓
Sleeping sickness.
D
Cholera.

Answer

Correct option: C.

Sleeping sickness.

Trypanosoma causes sleeping sickness.

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MCQ 761 Mark

Three domain classification has:

✓
Six kingdoms.
B
Four kingdoms.
C
Five kingdoms.
D
Three kingdom.

Answer

Correct option: A.

Six kingdoms.

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MCQ 771 Mark

Associations between Mycobiont and Phycobiont are found in:

A
Mycorrhiza.
B
Root.
✓
Lichens.
D
$\text{BGA}.$

Answer

Correct option: C.

Lichens.

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MCQ 781 Mark

Two organisms of the same class, but different families, will be kept under the same:

A
Genera.
B
Species.
✓
Order.
D
Family.

Answer

Correct option: C.

Order.

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MCQ 791 Mark

In the five$-$kingdom system of classification, which single kingdom out of the following can include blue$-$green algae, nitrogen$-$fixing bacteria and methanogenic archaebacteria?

A
Fungi
B
Plantae.
C
Protista
✓
Monera.

Answer

Correct option: D.

Monera.

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MCQ 801 Mark

Bacteria lack alternation of generation because there is:

✓
Neither syngamy nor reduction division.
B
Distinct chromosomes are absent.
C
No conjugation.
D
No exchange of genetic material.

Answer

Correct option: A.

Neither syngamy nor reduction division.

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MCQ 811 Mark

Which among the following includes the most closely related organisms?

✓
Species.
B
Genus.
C
Family.
D
Order.

Answer

Correct option: A.

Species.

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MCQ 821 Mark

On how many criteria living organisms have been classified into five kingdoms ?

A
Three.
✓
Four.
C
Five.
D
Two.

Answer

Correct option: B.

Four.

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MCQ 831 Mark

The infective state of malarial parasite Plasmodium that enters human body is:

A
Merozoite.
B
Sporozoite.
✓
Trophozoite.
D
Minuta form.

Answer

Correct option: C.

Trophozoite.

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MCQ 841 Mark

The viruses contain :

A
Proteins only
B
$\text{DNA}$ only
C
Nucleic acids only
✓
Proteins, $\text{DNA}$ or $\text{RNA} ($nucleic acids$)$

Answer

Correct option: D.

Proteins, $\text{DNA}$ or $\text{RNA} ($nucleic acids$)$

Viruses are ultramicroscopic and can cause diseases in plants and animals.
They are very simple in their structure.
They are composed of nucleic acid surrounded by a protein coat.
The nucleic acid can be either $\text{RNA}$ or $\text{DNA}$, but never both.

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MCQ 851 Mark

Binomial nomenclature consists of two words:

✓
Genus and species.
B
Order and family.
C
Family and genus.
D
Species and variety.

Answer

Correct option: A.

Genus and species.

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MCQ 861 Mark

Amoebiasis is prevented by:

A
Eating balanced food.
B
Eating plenty of fruits.
✓
Drinking boiled water.
D
Using mosquito nets.

Answer

Correct option: C.

Drinking boiled water.

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MCQ 871 Mark

White rust disease is caused by:

A
Claviceps.
B
Alternaria.
C
Phytophthora.
✓
Albugo candida.

Answer

Correct option: D.

Albugo candida.

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MCQ 881 Mark

Phenetic classification of organisms is based on:

A
Sexual characteristics
✓
Observable characteristics of existing organisms.
C
The ancestral lineage of existing organisms.
D
Dendogram based on $\text{DNA}$ characteristics.

Answer

Correct option: B.

Observable characteristics of existing organisms.

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MCQ 891 Mark

Temperature tolerance of thermal blue$-$green algae is due to:

✓
Cell wall structure.
B
Cell organization.
C
Mitochondrial structure.
D
Homopolar bonds in their proteins.

Answer

Correct option: A.

Cell wall structure.

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MCQ 901 Mark

First true phylogenetic system of classification was given by:

A
Eichler.
B
De Candolle.
C
Engler and Prantl.
✓
De Jussiaeu.

Answer

Correct option: D.

De Jussiaeu.

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MCQ 911 Mark

Small proteins produced by vertebrate cells naturally in response to viral infections and which inhibit multiplication of viruses are called:

A
Immunoglobulins.
✓
Interferons.
C
Antitoxins.
D
Lipoproteins.

Answer

Correct option: B.

Interferons.

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MCQ 921 Mark

Choose the correct match:

✓
Desmids $–$ Chrysophytes.
B
Gymnodinium $–$ Hemicellulosic plates in wall.
C
Euglena $–$ Chlorophyll $a\ \& \ c.$
D
Gonyaulax $–$ Red sea.

Answer

Correct option: A.

Desmids $–$ Chrysophytes.

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MCQ 931 Mark

Difference between Virus and Viroid is:

✓
Absence of protein coat in viroid but present in virus.
B
Presence of low molecular weight $\text{RNA}$ in virus but absent in viroid.
C
Both $a$ and $b.$
D
None of the above.

Answer

Correct option: A.

Absence of protein coat in viroid but present in virus.

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MCQ 941 Mark

In Rhizopus, hyphae are:

A
Branched, septate and antinuclear.
✓
Branched, aseptate and multi nucleate.
C
Unbranched, aseptate and multi nucleate.
D
Unbranched, septate and coenocytic.

Answer

Correct option: B.

Branched, aseptate and multi nucleate.

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MCQ 951 Mark

Red tides in sea appear due to:

A
Euglena.
B
Chrysophytes.
✓
Dinoflagellates.
D
Diatoms.

Answer

Correct option: C.

Dinoflagellates.

Red tides in sea appear is due to red dinoflagellates. Gonyaulax undergoes rapid multiplication and makes the sea apear red.

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MCQ 961 Mark

Which of the following statements is not true for retroviruses?

✓
$\text{DNA}$ is not present at any stage in the life cycle of retroviruses.
B
Retroviruses carry gene for $\text{RNA}$ dependent $\text{DNA}$ polymerase.
C
The genetic material in mature retroviruses is $\text{RNA}.$
D
Retroviruses are causative agents for certain kinds of cancer in man.

Answer

Correct option: A.

$\text{DNA}$ is not present at any stage in the life cycle of retroviruses.

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MCQ 971 Mark

Trypanosoma belongs to class.

A
Sarcodina.
✓
Zooflagellata.
C
Ciliata.
D
Sporozoa.

Answer

Correct option: B.

Zooflagellata.

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MCQ 981 Mark

Malignant tertian malaria is caused by:

✓
Plasmodium falciparum.
B
$P.$ vivax.
C
$P.$ ovale.
D
$P.$ malariae.

Answer

Correct option: A.

Plasmodium falciparum.

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MCQ 991 Mark

The scientist who created the group protista for both unicellular plants and animals is:

✓
Haecke.
B
Pasteur.
C
Lister
D
Koch.

Answer

Correct option: A.

Haecke.

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MCQ 1001 Mark

All viruses contain:

✓
Protein coat
B
Cell membrane
C
Endoplasmic Reticulum
D
Mitochondrial $\text{DNA}$

Answer

Correct option: A.

Protein coat

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MCQ 1011 Mark

The plasmid:

A
Helps in respiration.
B
Genes found inside nucleus.
C
Is a component of cell wall of bacteria.
✓
Is the genetic part in addition to $\text{DNA}$ in micro$-$organisms.

Answer

Correct option: D.

Is the genetic part in addition to $\text{DNA}$ in micro$-$organisms.

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MCQ 1021 Mark

Black rust of wheat is caused by:

✓
Puccinia.
B
Mucor.
C
Aspergillus.
D
Rhizopus.

Answer

Correct option: A.

Puccinia.

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MCQ 1031 Mark

The two kingdom Classification was given by:

A
Clinnaeus.
B
John ray.
✓
Huxley.
D
Whittaker.

Answer

Correct option: C.

Huxley.

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MCQ 1041 Mark

The smallest disease causing agent is:

A
Protozoa
✓
Virus
C
Bacteria
D
Fungi

Answer

Correct option: B.

Virus

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MCQ 1051 Mark

Which one of the following statements about viruses is correct?

A
Viruses possess their own metabolic system.
✓
Viruses contain either $\text{DNA}$ or $\text{RNA}.$
C
Viruses are facultative parasites.
D
Viruses are readily killed by antibiotics.

Answer

Correct option: B.

Viruses contain either $\text{DNA}$ or $\text{RNA}.$

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MCQ 1061 Mark

The asexual spores are not found, vegetative reproduction occurs by fragmentation and sexual organs are absent. Identify the class of fungi.

A
Phycomycetes.
B
Ascomycetes.
✓
Basidiomycetes.
D
Deuteromycetes.

Answer

Correct option: C.

Basidiomycetes.

In basidiomycete asexual spores are not found, and vegetative reproduction occurs by fragmentation.
Sex organs are absent in this class of fungi.

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MCQ 1071 Mark

The natural system of Classification is based on:

A
Morphology.
B
Evolutionary trend.
C
Anatomy.
✓
All of the above.

Answer

Correct option: D.

All of the above.

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MCQ 1081 Mark

Azotobacter and Bacillus polymyxa are the examples of:

A
Symbiotic nitrogen$-$fixers.
✓
Non$-$symbiotic nitrogen$-$fixers.
C
Ammonifying bacteria.
D
Disease$-$causing bacteria.

Answer

Correct option: B.

Non$-$symbiotic nitrogen$-$fixers.

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MCQ 1091 Mark

In Amoeba and Paramecium osmoregulation occurs through:

A
Pseudopodia.
B
Nucleus.
✓
Contractile vacuole.
D
General surface.

Answer

Correct option: C.

Contractile vacuole.

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MCQ 1101 Mark

The practical purpose of classification of living organisms is to:

✓
Facilitate identification of unknown organisms.
B
Name the living organisms.
C
Trace the evolution of living organisms.
D
Explain the origin of living organisms.

Answer

Correct option: A.

Facilitate identification of unknown organisms.

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MCQ 1111 Mark

Eubacteria can be differentiated from archaebacteria on the basis of:

A
Nutrition.
B
Ribosomes.
C
Gene of $\text{tRNA}.$
✓
Cell wall.

Answer

Correct option: D.

Cell wall.

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MCQ 1121 Mark

Which is the most acceptable system of biological classification?

A
Two Kingdom Classification.
B
Three Kingdom Classification.
✓
Five Kingdom Classification.
D
Six Kingdom Classification.

Answer

Correct option: C.

Five Kingdom Classification.

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MCQ 1131 Mark

Which of the following is the smallest virus?

✓
Foot and mouth virus
B
Tobacco mosaic virus
C
Coliphage lambda virus
D
Wound tumor virus

Answer

Correct option: A.

Foot and mouth virus

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MCQ 1141 Mark

Interferons are synthesized in response to:

A
Mycoplasma.
B
Bacteria.
✓
Viruses.
D
Fungi

Answer

Correct option: C.

Viruses.

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MCQ 1151 Mark

The part of life cycle of malarial parasite Plasmodium vivax, that is passed in female Anopheles is:

✓
Sexual cycle.
B
Pre$-$erythrocytic schizogony.
C
Exo$-$erythrocytic schizogony.
D
Post$-$erythroeytic schizogony.

Answer

Correct option: A.

Sexual cycle.

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MCQ 1161 Mark

Which of the following is not a viral disease?

A
$\text{AIDS}.$
B
Herpes.
✓
Tuberculosis.
D
Smallpox.

Answer

Correct option: C.

Tuberculosis.

$\text{AIDS},$ herpes and smallpox are viral diseases. Tuberclosis is a bacterial disease.

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MCQ 1171 Mark

Tobacco Mosaic Virus $\text{(TMV)}$ genes are.

A
Double stranded $\text{RNA}.$
✓
Single stranded $\text{RNA}.$
C
Polyribonucleotides.
D
Proteinaceous.

Answer

Correct option: B.

Single stranded $\text{RNA}.$

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MCQ 1181 Mark

Entamoeba coli causes:

A
pyorrhoea.
✓
diarrhoea.
C
dysentery.
D
None of these.

Answer

Correct option: B.

diarrhoea.

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MCQ 1191 Mark

Nitrogen fixer soil organisms belong to:

A
Mosses.
✓
Bacteria.
C
Green algae.
D
Soil fungi

Answer

Correct option: B.

Bacteria.

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MCQ 1201 Mark

Naked cytoplasm, multinucleated and saprophytic are the characteristics of:

A
Monera.
B
Protista.
C
Fungi.
✓
Slime moulds.

Answer

Correct option: D.

Slime moulds.

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MCQ 1211 Mark

In which kingdom would you classify the archaebecteria and nitrogen-fixing organisms. If the five$-$kingdom system of classification is used?

✓
Monera.
B
Fungi.
C
Plantae.
D
Protista.

Answer

Correct option: A.

Monera.

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MCQ 1221 Mark

The term “Phylum” was given by:

✓
Cuvier.
B
Haeckel.
C
Theophrastus.
D
Linnaeus.

Answer

Correct option: A.

Cuvier.

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MCQ 1231 Mark

Who discovered virus?

A
Miller
✓
Ivanovsky
C
Herelle
D
Mendel

Answer

Correct option: B.

Ivanovsky

Dmitri Ivanovsky reported in $1892$ that sap from a diseased tobacco plant remained infectious to healthy tobacco plants despite having been filtered.
Then, in $1898$, Martinus Beijerinck called the filtered, infectious substance a virus.

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MCQ 1241 Mark

The pathogen Microsporum responsible for ringworm disease in humans belongs to the same Kingdom of organisms as that of:

✓
Rhizopus, a mould
B
Ascaris, a round worm
C
Taenia, a tapeworm
D
Wuchereria, a filarial worm

Answer

Correct option: A.

Rhizopus, a mould

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MCQ 1251 Mark

Prion consists of $.........$

A
$\text{DNA}$
B
$\text{RNA}$
C
Both $\text{DNA}$ and $\text{RNA}$
✓
Protein

Answer

Correct option: D.

Protein

A prion is an abnormal form of a normally harmless protein found in the brain that is responsible for a variety of fatal neurodegenerative diseases of animals including humans.
All prion diseases in mammals affect the structure of the brain or other neural tissue and have no known effective treatment.
Prion diseases are always fatal.
Creutzfeldt Jakob disease is the prion disease in humans.

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MCQ 1261 Mark

Viruses are no more “alive” than isolated chromosomes because?

✓
Both require the environment of a cell to replicate.
B
They require both $\text{RNA}$ and $\text{DNA}.$
C
They both need food molecules.
D
They both require oxygen for respiration.

Answer

Correct option: A.

Both require the environment of a cell to replicate.

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MCQ 1271 Mark

Human Immunodeficiency Virus $\text{(HIV)}$ has a protein coat and a genetic material which is:

A
Single stranded $\text{DNA}.$
✓
Single stranded $\text{RNA}.$
C
Double stranded $\text{RNA}.$
D
Double stranded $\text{DNA}.$

Answer

Correct option: B.

Single stranded $\text{RNA}.$

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MCQ 1281 Mark

All eukaryotic unicellular organisms belong to.

A
Monera.
✓
Protista.
C
Fungi.
D
Bacteria.

Answer

Correct option: B.

Protista.

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MCQ 1291 Mark

Escherichia coli is used extensively in biological research as it is:

✓
Easily cultured.
B
Easily available.
C
Easy to handle.
D
Easily multiplied in host.

Answer

Correct option: A.

Easily cultured.

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MCQ 1301 Mark

In five kingdom system, the main basis of classification is:

A
Structure of nucleus.
B
Asexual reproduction.
✓
Mode of nutrition.
D
Structure of cell wall.

Answer

Correct option: C.

Mode of nutrition.

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MCQ 1311 Mark

Claviceps purpurea is causal organism of:

A
Smut of barley.
B
Rust of wheat.
✓
Ergot of rye.
D
Powdery mildew of pea.

Answer

Correct option: C.

Ergot of rye.

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MCQ 1321 Mark

Species is:

✓
Basic unit of classification.
B
Unit in the evolutionary history of a tree.
C
Specific class of evolution.
D
Not related to evolution.

Answer

Correct option: A.

Basic unit of classification.

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MCQ 1331 Mark

Binomial nomenclature means:

A
One name given by two scientists.
✓
One scientific name consisting of a generic and a specific name.
C
Two names, one Latinised, other of a person.
D
None of the above.

Answer

Correct option: B.

One scientific name consisting of a generic and a specific name.

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MCQ 1341 Mark

Most common type of genetic material present in bacteriophages is:

✓
$\text{DS DNA}.$
B
$\text{DS RNA}$
C
$\text{SS RNA}.$
D
$\text{SS DNA}.$

Answer

Correct option: A.

$\text{DS DNA}.$

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MCQ 1351 Mark

Which of the following organisms is a good indicator of pollution in an environment?

A
Bacteria.
B
Fungis.
C
Algae.
✓
Lichens.

Answer

Correct option: D.

Lichens.

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MCQ 1361 Mark

In which one of the following pairs of diseases both are caused by viruses?

A
Tetanus and typhoid.
B
Whooping cough and sleeping sickness.
C
Syphilis and $\text{AIDS}.$
✓
Measles and rabies.

Answer

Correct option: D.

Measles and rabies.

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MCQ 1371 Mark

Non$-$symbiotic nitrogen fixers are:

✓
Azotobacter.
B
Pseudomonas.
C
Soil fungi.
D
Blue$-$green algae.

Answer

Correct option: A.

Azotobacter.

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MCQ 1381 Mark

According to five$-$kingdom classification, which of the following does not contain nuclear membrane?

A
Protista.
✓
Monera.
C
Fungi.
D
Animalia.

Answer

Correct option: B.

Monera.

According to five kingdom classification, Monera does not contain nuclear membrane.

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MCQ 1391 Mark

Genophore bacterial genome or nucleoid is made of:

A
Histones and nonhistones.
B
$\text{RNA}$ and histones.
✓
A single double stranded $\text{DNA}.$
D
A single stranded $\text{DNA}.$

Answer

Correct option: C.

A single double stranded $\text{DNA}.$

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MCQ 1401 Mark

Naked cytoplasm, multinucleated and saprophytic are the characteristics of.

A
Monera.
B
Protista.
C
Fungi.
✓
Slime molds.

Answer

Correct option: D.

Slime molds.

Slime molds were earlier kept under kingdom fungi but due to multinucleate character and naked protoplasm, they are now considered as belonging to monera.

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MCQ 1411 Mark

The term antibiotic was first used by:

A
Fleming.
B
Pasteur.
✓
Waksman.
D
Lister.

Answer

Correct option: C.

Waksman.

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MCQ 1421 Mark

Which of the following is the correct sequence in the order of increasing complexity?

A
Molecules Tissues Community Population
B
Cells Tissues Community Population
✓
Tissues Organisms Population Community
D
Molecules Tissues Community Cells.

Answer

Correct option: C.

Tissues Organisms Population Community

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MCQ 1431 Mark

Which of the following statement about Mycoplasma is true:

✓
They differ from viruses in being cellular in organisation.
B
Insensitive to several antibiotics as they have $70\text{S}$ ribosomes.
C
They can survive without photosynthetic pigments and genetic material.
D
They are smallest, disease causing thin walled organisms

Answer

Correct option: A.

They differ from viruses in being cellular in organisation.

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MCQ 1441 Mark

Choose the correct match.

A
Photosynthetic autotrophs $–$ Nutrient recycling.
B
Chemosynthetic autotrophs $–$ Nitrogen fixation.
✓
Heterotrophic bacteria $–$ Production of antibiotics.
D
Mycoplasma $–$ Production of curd.

Answer

Correct option: C.

Heterotrophic bacteria $–$ Production of antibiotics.

Photosynthetic autotrophs helps in fixing atmospheric nitrogen. Chemosynthetic autotrophs helps in nutrient recycling. Heterotrophic bacteria helps in making curd, production of antibiotics, etc.

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MCQ 1451 Mark

Bacteria is a group of prokaryotic organisms which is characterised by:

A
Simple structure and complex behaviour.
B
$70\text{S}$ ribosomes.
C
Peptidoglycan cell wall.
✓
All of the above.

Answer

Correct option: D.

All of the above.

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MCQ 1461 Mark

The main difference in Gram $(+) \ ve$ and Gram $(-) \ ve$ bacteria resides in their:

✓
Cell wall.
B
Cell membrane.
C
Cytoplasm.
D
Flagella.

Answer

Correct option: A.

Cell wall.

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MCQ 1471 Mark

If a scientist has to names a similar species, he should study the:

A
Holotype.
B
Syntype.
C
Mesotype.
✓
Isotype.

Answer

Correct option: D.

Isotype.

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MCQ 1481 Mark

Who was the first scientist to classify living beings?

✓
Aristotle Hac.
B
Linnaeus.
C
Whittaker.
D
Robert Hook.

Answer

Correct option: A.

Aristotle Hac.

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MCQ 1491 Mark

Decomposers are organisms that:

A
Elaborate chemical substances, causing death of tissues.
B
Operate in living body and simplifying organic substances of cells step by step.
C
Attack and kill plants as well as animals.
✓
Operate in relay terms, simplifying step by step the organic constituents of dead body.

Answer

Correct option: D.

Operate in relay terms, simplifying step by step the organic constituents of dead body.

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MCQ 1501 Mark

What may be a 'photosynthetic protistian' to one biologist may be 'a plant' to another? Which of the given below features of slime moulds shows linkage with plant?

A
Formation of fruiting bodies.
✓
Slime moulds have cellulosic spore wall.
C
Presence of holozoic nutrition.
D
Presence of diverse sexual reproduction.

Answer

Correct option: B.

Slime moulds have cellulosic spore wall.

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MCQ 1511 Mark

Contagium vivum fluidum was proposed by.

A
$D.J.$ Ivanowsky.
✓
$M.W.$ Beijerinek.
C
Stanley.
D
Robert Hook.

Answer

Correct option: B.

$M.W.$ Beijerinek.

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MCQ 1521 Mark

An association between roots of higher plants and fungi is called.

A
Lichen.
B
Fern.
✓
Mycorrhiza.
D
$\text{BGA}.$

Answer

Correct option: C.

Mycorrhiza.

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MCQ 1531 Mark

Phenetic classification is based on:

A
Sexual characteristics.
B
The ancestral lineage of existing organisms
C
Dendograms based on $\text{DNA}$ characteristics.
✓
Observable characteristics of existing organisms.

Answer

Correct option: D.

Observable characteristics of existing organisms.

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MCQ 1541 Mark

Plasmodium, the malarial parasite, belongs to class:

A
Sarcodina.
B
Ciliata.
✓
Sporozoa.
D
Dinophyceae.

Answer

Correct option: C.

Sporozoa.

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MCQ 1551 Mark

The primary ventral cell give rises to:

A
Jacket
B
Tapetum
✓
Oosphere
D
Oospore

Answer

Correct option: C.

Oosphere

The correct answer is 'oosphere'
The primary ventral cell in a fungus leads to formation of oosphere formed after fertilisation from oogonium.

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MCQ 1561 Mark

Interferons are:

✓
Antiviral protein.
B
Antibacterial proteins.
C
Anticancer proteins.
D
Complex proteins.

Answer

Correct option: A.

Antiviral protein.

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