M.C.Q (1 Marks)

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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BIOLOGY M.C.Q (1 Marks)