Question 11 Mark
Which organ acts a temporary endocrine gland in females?
Answer
View full question & answer→Placenta acts as the temporary endocrine gland in females.
Questions
Answer the following questions
Take a timed test
123 questions · self-marked practice — reveal the answer and mark yourself.
Question 21 Mark
Identify ‘A’ from the following ECG.
Answer
View full question & answer→‘A’ represents the ‘RR interval’ in the given ECG.
Question 31 Mark
From which type of cells, root hair is originated
Answer
View full question & answer→Root hair is originated from epiblema cells.
Question 41 Mark
Enlist the names of enzymes used in semiconservative replication of DNA?
Answer
View full question & answer→Following are the enzymes required during DNA synthesis:
- Helicase (rep protein)
- RNA primase
- DNA polymerase
- RNase
- DNA ligase
- Gyrase
Question 51 Mark
What is the reason for the $21^{st}$ trisomy?
Answer
View full question & answer→$21st$ Trisomy occurs due to non-disjunction or failure of separation of chromosomes (autosomes) during gamete formation.
Question 61 Mark
Identify the permanent birth control method in given diagram.
Answer
View full question & answer→The permanent birth control method in the given diagram is called as tubectomy.
Question 71 Mark
What is ‘Leukemia’?
Answer
View full question & answer→Leukemia is a type of blood cancer in which there is excessive formation of white blood cells (WBCs) or leucocytes in the bone marrow.
Question 81 Mark
What is adventive polyembryony?
Answer
View full question & answer→In adventive polyembryony, embryos may develop from somatic nucellus or integuments along with normal zygotic embryo.
Question 91 Mark
Which disease is caused by hyper secretion of Glucocorticoids?
Answer
View full question & answer→Cushing’s disease is caused by hypersecretion of Glucocorticoids.
Question 101 Mark
How many molecules of haemoglobin are found in each erythrocyte?
Answer
View full question & answer→Each erythrocyte approximately contains 270 million molecules of haemoglobin.
Question 111 Mark
What is the composition of inner layer of root hair?
Answer
View full question & answer→The inner layer of root hair is made up of cellulose.
Question 121 Mark
What are the different types of mutations?
Answer
View full question & answer→Following are the different type of mutations:
- Point mutations,
- frameshift mutation, or
- deletion mutation.
Question 131 Mark
How drones are produced in honey bees?
Answer
View full question & answer→Through the process of parthenogenesis, drones are produced in honey bees.
Question 141 Mark
Name the embryonic layer from which heart, blood, and blood vessels develop.
Answer
View full question & answer→The heart, blood, and blood vessels develop from the mesoderm.
Question 151 Mark
What Allen’s rule indicates in adaptation?
Answer
View full question & answer→Mammals from colder climates generally have shorter snout, ears, tail and limbs to minimize the loss of body heat.
Question 161 Mark
Bt-cotton shows adverse effect on the population of which butterfly?
Answer
View full question & answer→Bt-cotton shows adverse effect on the Monarch butterfly populations.
Question 171 Mark
Small part of activated sludge is passed back into primary sedimentation tank.
If the above statement is correct then rewrite as it is and in case it is incorrect then reframe it.
Answer
View full question & answer→Small part of activated sludge is passed back into the aeration tank.
Question 181 Mark
When a drug addict is not allowed to take drugs he shows certain typical symptoms. What are these symptoms termed as?
Answer
View full question & answer→The symptoms are termed as Withdrawal syndrome.
Question 191 Mark
What is the role of suspensor during the development of embryo?
Answer
View full question & answer→The suspensor helps in pushing the embryo into the endosperm.
Question 201 Mark
Name the hormone secreted by Pars intermedia in lower vertebrates.
Answer
View full question & answer→Melanocyte stimulating hormone (MSH) is secreted by Pars intermedia in lower vertebrates.
Question 211 Mark
In between which layers of pericardium, pericardial fluid is present?
Answer
View full question & answer→Pericardial fluid is present between the parietal and visceral layers of the pericardium.
Question 221 Mark
What is the composition of an outer layer of root hair?
Answer
View full question & answer→Outer layer of root hair is composed of pectin.
Question 231 Mark
What is the role of $Mg^{++}$ in Translation?
Answer
View full question & answer→During protein synthesis (translation), $Mg^{++}$ ions act as co-factors for joining two subunits of ribosomes.
Question 241 Mark
Which genes show straight inheritance?
Answer
View full question & answer→Genes present on the Y chromosome (Y-linked genes) show straight inheritance.
Question 251 Mark
What is the function of inner cell mass?
Answer
View full question & answer→The ‘embryo proper’ develops from the inner cell mass.
Question 261 Mark
Rearrange the terms population, Biome, Community and Organisms in ecological hierarchy
Answer
View full question & answer→Organisms, population, community, biome.
Question 271 Mark
What is the role of Taq-polymerase in PCR technology?
Answer
View full question & answer→Taq-polymerase helps in polymerization of DNA molecules in PCR technology.
Question 281 Mark
What are flocs with respect to sewage treatment?
Answer
View full question & answer→Flocs are the masses of bacteria held together by slime and fungal hyphae to form mesh like masses.
Question 291 Mark
Name the vector of pathogen responsible for filariasis.
Answer
View full question & answer→Wuchereria bancrofti is transmitted to human body by female Culex mosquito.
Question 301 Mark
Which is the most common type of endosperm in angiospermic families?
Answer
View full question & answer→Nuclear type is the most common type of endosperm found in angiospermic families.
Question 311 Mark
Define Saltatory conduction.
Answer
View full question & answer→Saltatory conduction is the rapid passage of action potential along myelinated nerves from one node of Ranvier to the other.
Question 321 Mark
Which type of blood flows through pulmonary veins?
Answer
View full question & answer→The pulmonary veins carry oxygenated blood.
Question 331 Mark
Define the following:
Capillary water
Capillary water
Answer
View full question & answer→Some amount of water is held in pores present between the neighbouring soil particles, due to capillarity. This is called capillary water which is available for absorption.
Question 341 Mark
What is meant by the activation of amino acids?
Answer
View full question & answer→Activation of amino acid involves the addition of ATP molecule to amino acid and binding of this amino acid to the binding site of t-RNA and forming of the t-RNA-amino acid complex.
Question 351 Mark
How many linkage groups are present in Drosophila melanogaster?
Answer
View full question & answer→4 linkage groups are present in Drosophila melanogaster.
Question 361 Mark
What is morula?
Answer
View full question & answer→The 16-32 celled stage which develops during cleavage by the end of the 4th day after fertilization is called a morula.
Question 371 Mark
Define the term Habitat.
Answer
View full question & answer→A habitat is an area, where a species lives and interact with the other factors and prosper.
Question 381 Mark
Alu-I is obtained from which organism?
Answer
View full question & answer→Alu-I is obtained from Arthrobacter luteus.
Question 391 Mark
Name the tank to which the sewage water is passed after the preliminary treatment?
Answer
View full question & answer→The sewage water is passed to the primary sedimentation tank after the preliminary treatment.
Question 401 Mark
What are congenital diseases?
Answer
View full question & answer→Congenital diseases are present from birth; may be caused by genetic abnormality or metabolic disorder. They may be permanent and were practically incurable.
Question 411 Mark
Why fertilization process in angiosperms is called as double fertilization?
Answer
View full question & answer→In fertilization process of angiosperms, both the male gametes participate, due to which fertilization occurs twice in the same embryo sac, hence it is described as double fertilization.
Question 421 Mark
What is the function of the red nucleus?
Answer
View full question & answer→Near the centre of the midbrain is a mass of grey matter scattered within the white matter. It is called the red nucleus. It plays an important role in controlling posture and muscle tone, modifying some motor activities, and motor coordination.
Question 431 Mark
Define haematology.
Answer
View full question & answer→The study of blood is called haematology.
Question 441 Mark
Define the following:
Combined water
Combined water
Answer
View full question & answer→Water present in the form of hydrated oxides of silicon, aluminum, etc., is called ‘combined water’.
Question 451 Mark
Whose fossils were discovered at the site of Shivalik hills, India?
Answer
View full question & answer→The fossils of Ramapithecus were discovered at the site of Shivalik hills, India.
Question 461 Mark
AUG codon gives ________ & ________ amino acids in prokaryotes & Eukaryotes respectively.
Answer
View full question & answer→AUG codon gives formylmethionine & methionine amino acids in prokaryotes & Eukaryotes respectively.
Question 471 Mark
Give an example of complete linkage.
Answer
View full question & answer→X chromosome of Drosophila males shows complete linkage.
Question 481 Mark
Name the hydrolytic enzyme secreted by the acrosome.
Answer
View full question & answer→Hyaluronidase is secreted by the acrosome.
Question 491 Mark
What is ESS?
Answer
View full question & answer→Evolutionary Stable Strategy (ESS) is a strategy in which the males and females are in a ratio of 1:1.
Question 501 Mark
What is Palindromic sequence?
Answer
View full question & answer→The sequences which read same in forward and reverse direction are known as palindromic sequences.
Question 511 Mark
What is mycorrhiza?
Answer
View full question & answer→Mycorrhiza is a fungus. It forms symbiotic association with the underground parts like rhizomes and root of higher plants occurring in thick humid forests.
Question 521 Mark
Name the vector of malarial pathogen.
Answer
View full question & answer→Insect vector- female Anopheles mosquito
Question 531 Mark
Name any one plant in which double fertilization was discovered?
Answer
View full question & answer→Lilium and Fritillaria
Question 541 Mark
How electrical synapse differs from chemical synapse?
Answer
View full question & answer→In an electrical synapse transmission of impulse takes place directly from one neuron to the next, whereas in chemical synapse transmission of impulse occurs via neurotransmitters present in the synaptic vesicles.
Question 551 Mark
Sachin shows symptoms of inflammation of the sinuses and mucous discharge due to viral and bacterial infection. Identify the disorder.
Answer
View full question & answer→Sachin is suffering from sinusitis.
Question 561 Mark
Define the following:
Hygroscopic water
Hygroscopic water
Answer
View full question & answer→Fine soil particles imbibe/absorb water and hold it very tightly. This is called ‘hygroscopic water'.
Question 571 Mark
Name the ancestor of human nicknamed as Handyman
Answer
View full question & answer→Homo habilis is nicknamed Handyman.
Question 581 Mark
What is meant by an operon?
Answer
View full question & answer→A unit of genetic material that functions in a coordinated manner by means of a regulator, an operator, a promoter, and one or more structural genes that are transcribed together is called an operon.
Question 591 Mark
Define euploidy.
Answer
View full question & answer→When the chromosome number in a cell is the exact multiple of the primary basic number, then it is called euploidy.
Question 601 Mark
What is atresia with respect to ovary in human females?
Answer
View full question & answer→The large-scale destruction of primordial follicles during growth is called Atresia.
Question 611 Mark
Define the term spatial niche.
Answer
View full question & answer→It deals with the physical space occupied by the organisms.
Question 621 Mark
What is plasmid?
Answer
View full question & answer→Plasmid is a circular, double stranded, self-replicating, extra-chromosomal DNA molecule.
Question 631 Mark
Name the chamber in which the suspended objects are filtered and removed during sewage treatment?
Answer
View full question & answer→The suspended objects are filtered and removed during sewage treatment in the screening chambers.
Question 641 Mark
What is ‘serology’
Answer
View full question & answer→Study of antigen-antibody interactions is called as serology.
Question 651 Mark
What is protandry?
Answer
View full question & answer→Protandry is a condition in which anthers mature first, but the stigma of the same flower is not receptive at that time.
Question 661 Mark
What is the covering of nerve fascicule called?
Answer
View full question & answer→The covering of the nerve fascicule is called endoneurium.
Question 671 Mark
Define total lung capacity.
Answer
View full question & answer→The maximum amount of air that the lungs can hold after a maximum forceful inspiration is known as total lung capacity
Question 681 Mark
Name the tissue that transports hormones within the plant body?
Question 691 Mark
Define the following:
Gravitational water
Gravitational water
Answer
View full question & answer→The water which percolates deep in the soil, due to gravity is called ‘gravitational water’.
Question 701 Mark
Very short answer question.
Name the ancestor of human which is described as a man with an ape brain.
Answer
View full question & answer→Australopithecus is the ancestor of humans which is described as a man with an ape brain.
Question 711 Mark
Enlist the genes in Lac operon
Answer
View full question & answer→Genes present in lac operon:
- Regulatory gene: Gene i,
- Structural genes: lac a, lac y and lac z.
Question 721 Mark
Define the following:
test cross.
test cross.
Answer
View full question & answer→Test cross: The cross between $F_1$ hybrid and its homozygous recessive parent is called a test cross.
Question 731 Mark
What is glans penis?
Answer
View full question & answer→The swollen tip of external genitalia or penis is called as glans penis.
Question 741 Mark
A medicinal plant Rauwolfia vomitoria shows variations in concentration of reserpine from location to location. What type of level of biodiversity is this?
Answer
View full question & answer→Variations in concentration of reserpine in Rauwolfia vomitoria from location to location is a type of ‘Genetic diversity’.
Question 751 Mark
What is ‘Climax community’?
Answer
View full question & answer→A climax community is the final stage of ecological succession which remains stable as long as the environment remains unchanged
Question 761 Mark
What is population ecology?
Answer
View full question & answer→Population ecology is an important area of ecology that links ecology to population dynamics, genetics and evolution.
Question 771 Mark
Which Recombinant proteins is obtained for Hepatitis-B by r-DNA technology.
Answer
View full question & answer→Hepatitis B is treated using Hepatitis B vaccine obtained by the application of r-DNA technology.
Question 781 Mark
What is the main function of a fermenter?
Answer
View full question & answer→The main function of a fermenter is to provide a controlled environment for growth of a microorganism or a defined mixture of microorganisms, to obtain the desired product.
Question 791 Mark
Name the causative pathogen of Ascariasis.
Answer
View full question & answer→Ascariasis is caused by the endoparasitic roundworm (Nematode), Ascaris lumbricoides.
Question 801 Mark
What is hilum with respect to ovule?
Answer
View full question & answer→Hilum is the point of attachment of funiculus to the main body of ovule.
Question 811 Mark
Give function of astrocytes in nervous system.
Answer
View full question & answer→Astrocytes have varied roles in the brain, secretion and absorption of neural transmitter and maintenance of blood-brain barrier BBB. They also regulate the transmission of electrical impulses with the brain.
Question 821 Mark
Give the function of epiglottis.
Answer
View full question & answer→Epiglottis prevents the entry of food into trachea.
Question 831 Mark
Why is ABA known as antitranspirant?
Answer
View full question & answer→ABA can cause efflux of K+ ions from the guard cells and result in closure of stomata. So, it is known as an anti-transpirant.
Question 841 Mark
Define: Root hair
Answer
View full question & answer→The cytoplasmic extension (prolongation) of the epiblema cell is called root hair.
Question 851 Mark
Very short answer question.
Define the Gene pool
Answer
View full question & answer→The total genetic information encoded in the sum total of genes in a Mendelian population is called gene pool.
Question 861 Mark
What is the use of southern blotting in DNA fingerprinting?
Answer
View full question & answer→In the Southern blotting technique, the DNA fragments separated using agarose gel electrophoresis are transferred to a nylon membrane or a nitrocellulose filter paper by placing it over the gel and soaking them with filter paper overnight.
Question 871 Mark
What is allelomorph?
Answer
View full question & answer→Two or more alternative forms of a gene present at the same loci (positions) of homologous chromosomes and controlling the same character are called alleles or allelomorphs.
Question 881 Mark
Name the enzyme secreted by the prostate gland.
Answer
View full question & answer→The enzyme secreted by prostate gland is acid phosphatase.
Question 891 Mark
Name the Japanese method of plantation adapted by our government.
Answer
View full question & answer→Japanese Miyawaki method of plantation was adapted by our government.
Question 901 Mark
Define ‘Ecological succession’.
Answer
View full question & answer→The gradual and predictable changes in the species composition of a given area are called ecological succession.
Question 911 Mark
How absolute Natality differs from Realized Natality
Answer
View full question & answer→- Absolute Natality: The number of births under ideal conditions (with no competition, abundance of resources such as food and water, etc.).
- Realized Natality: The number of births when environmental pressures come into play. Absolute natality will be always more than realized natality
Question 921 Mark
What is Germline therapy?
Answer
View full question & answer→In germline therapy healthy genes are introduced into germ cells like sperms, eggs, early embryos.
Question 931 Mark
Name biofortified wheat variety for high protein content.
Answer
View full question & answer→Atlas 66
Question 941 Mark
What are Non-communicable diseases?
Answer
View full question & answer→The diseases that cannot be transmitted from infected person to another healthy person, either directly or indirectly are known as NonCommunicable or Non-Infectious diseases. e.g. Cancer and deficiency diseases
Question 951 Mark
At which stage pollen grains are shed from the anther in Angiosperms?
Answer
View full question & answer→At the two-celled stage, pollen grains are shed from the anther in Angiosperms.
Question 961 Mark
Which cells of PNS secrete myelin sheath around the nerves?
Answer
View full question & answer→Schwann cells secrete myelin sheath around the nerves.
Question 971 Mark
Name the cartilage which divides the nasal cavity into right and left nasal chambers.
Question 981 Mark
Buyers often complain that a particular fruit merchant uses some chemical to ripen fruits in his shop.
Name the chemical he must be using to do so.
Answer
View full question & answer→Ethylene (Ethret/ Ethephon) is used for ripening of fruits.
Question 991 Mark
Why water acts as a thermal buffer?
Answer
View full question & answer→Water has high specific heat, high heat of vaporization, and high heat of fusion. Due to this, it acts as a thermal buffer.
Question 1001 Mark
Define the term ‘Mendelian population’.
Answer
View full question & answer→The populations that occur in small groups of ‘interbreeding populations’ are referred to as the ‘Mendelian population’.
Question 1011 Mark
What is the principle of DNA profiling?
Answer
View full question & answer→The technique developed to identify a person with the help of DNA restriction analysis is known as DNA profiling or DNA fingerprinting.
Question 1021 Mark
Define inheritance.
Answer
View full question & answer→The transmission of genetic information from generation to generation is known as heredity or inheritance.
OR
The transmission of characters from one generation to the next or from parents to offsprings is called heredity.
Question 1031 Mark
How many pairs of testis are present in human male?
2 pairs
1 pair
only one testis
only one ovary
Answer
View full question & answer→1 pair.
Question 1041 Mark
What is ‘Hello Forest’?
Answer
View full question & answer→‘Hello Forest’ is a 24-hour toll free helpline number (1926) which has been set up to provide information regarding plantation, protection and for mass awareness.
Question 1051 Mark
What is ‘Sere’?
Answer
View full question & answer→The entire sequence of communities that changes successively in a given area is called sere(s).
Question 1061 Mark
Define Absolute Mortality.
Answer
View full question & answer→The number of deaths under ideal conditions (with no competition, abundance of resources such as food and water, etc.).
Question 1071 Mark
In which transgenic plant the substance Flavonoids obtained as antioxidants.
Answer
View full question & answer→Antioxidants flavonoids are obtained from transgenic Tomato plant.
Question 1081 Mark
What is ‘biofortification’?
Answer
View full question & answer→Biofortification is the method of breeding of crops to produce varieties which have increased nutritional value.
Question 1091 Mark
Define ‘Health’, as given by WHO.
Answer
View full question & answer→Health is defined as the state of complete physical, mental and social well-being and not merely the absence of disease or infirmity.
Question 1101 Mark
Why anther is called as tetrasporangiate structure?
Answer
View full question & answer→Due to the presence of four pollen sacs in dithecus anther, it is called as tetrasporangiate structure.
Question 1111 Mark
Define Heterochromatin.
Answer
View full question & answer→Heterochromatin is a genetically and transcriptionally inactive, condensed, and strongly staining region of chromosomes.
Question 1121 Mark
Define 'RFLP’.
Answer
View full question & answer→The restriction enzymes cut the DNA into small fragments having variable lengths. This phenomenon is called Restriction Fragment Length Polymorphism (RFLP).
Question 1131 Mark
What is the function of SSBP?
Answer
View full question & answer→Single strand DNA binding proteins (SSBPs) are important during DNA synthesis as they prevent the coiling of the separated DNA strands.
Question 1141 Mark
What is the function of RNA primer?
Answer
View full question & answer→During DNA replication, the RNA primer attaches to the 3’ end of the template strand and attracts complementary nucleotides from the surrounding nucleoplasm.
Question 1151 Mark
What type of isotopes used in semiconservative replication experiment?
Answer
View full question & answer→$14$ N i.e. normal (light) nitrogen and heavy isotope of nitrogen $N^{15}$ was used in semiconservative replication experiment.
Question 1161 Mark
Give one role of hormone therapy.
Answer
View full question & answer→Hormone therapy is applied in pregnancy, menopause, osteoporosis, growth hormone deficiency, insulin resistance, cancer, etc.
Question 1171 Mark
Identify the pulse point ‘A’ from below given diagram.
Answer
View full question & answer→In the given diagram, ‘A’ represents the brachial pulse point.
Question 1181 Mark
________ type of tissues are present in epiphytic roots.
Meristematic
Parenchyma
Velamen
Epithelial
Answer
View full question & answer→Velamen type of tissues is present in epiphytic roots.
Question 1191 Mark
What is central dogma of molecular biology?
Answer
View full question & answer→i. The central dogma of molecular biology explains the flow of genetic information, from DNA to RNA to make a functional product, a protein
ii. Genetic information is transferred from DNA to mRNA through transcription and from mRNA to proteins through translation.
DNA $\stackrel{\text { Transcription }}{\longrightarrow} m$ RNA $\stackrel{\text { Transcription }}{\longrightarrow}$ proteins
iii. It implies that RNA acts as a messenger to deliver the information from DNA to the ribosomes, where it is combined to generate all of our proteins.
ii. Genetic information is transferred from DNA to mRNA through transcription and from mRNA to proteins through translation.
DNA $\stackrel{\text { Transcription }}{\longrightarrow} m$ RNA $\stackrel{\text { Transcription }}{\longrightarrow}$ proteins
iii. It implies that RNA acts as a messenger to deliver the information from DNA to the ribosomes, where it is combined to generate all of our proteins.
Question 1201 Mark
Give the example of X- monosomy you have studied.
Answer
View full question & answer→Turner syndrome is an example of X-monosomy.
Question 1211 Mark
What is the use of tablet ‘Saheli’?
Answer
View full question & answer→Saheli is an oral contraceptive pill.
Question 1221 Mark
Define ‘Adolescence’.
Answer
View full question & answer→Adolescence is the period of beginning with the appearance of secondary sexual characters and the termination with cessation of somatic i.e. body growth.
Question 1231 Mark
Name the hormone produced by unfertilised ovary responsible for enlargement of ovary into fruit.
Answer
View full question & answer→Auxin (Indole-3 Acetic Acid)