1. Which among the following is commonly called withdrawal method?
(a) Lactational amenorrhoea
(b) Coitus interruptus
(c) Periodic abstinence
(d) Rhythm method		 ANS B
2. Morgan hybridised Drosophila white eyed and yellow bodied female with red eyed and brown
bodied male (wild type) and intercrossed their F, progeny. He observed that the two genes:
(a) Did not segregate independent of each other.
(b) May be located on two different chromosomes.
(c) Segregated independently of each other.
(d) Showed very high percentage of recombinants,		 ANS A
3. Mating of a superior male of a breed of a cattle to a superior female of another breed is called
(a) inbreeding     (c) out-breeding
(b) out-crossing  (d) cross-breeding		 ANS D
4. Which one of the following is not a method of in situ conservation of biodiversity?
(a) Sacred grove
(b) Biosphere reserve
(c) Wildlife sanctuary
(d) Botanical garden		 ANS D
5. Breeding of crops to increase the levels of essential nutrients, is called
(a) biofortification.    (c) bioinformatics.
(b) biomagnification. (d)biotechnology.		 ANS A

6. A Symptote in a logistic growth curve is obtained, when

(a) The Value of 'r' approaches zero

(b) K=N

(C) K>N

(D) K<N

 ANS B
7. MALT constitutes about .........percent of the lymphoid tissue in the human body.
(a) 50% (b) 20% (c) 70% (d) 10%		 ANS A
8. When the pollen of a flower is transferred to the stigma of another flower on the same plant, the
process is known as
(a) autogamy       (c) xenogamy
(b) geitonogamy  (d) cleistogamy		  ANS B
9. If the distance between two consecutive base pairs is 0.34 nm and the total number of base pairs
of a DNA double helix in a typical mammalian cell is 6.6 × 109 bp, then the length of the DNA is
approximately
(a) 2.0 meters (c) 2.2 meters
(b) 2.5 meters (d) 2.7 meters		  ANS C

10. During DNA replication, Okazaki fragments are used to elongate

(a) The leading strand towards replication fork
(b) The lagging strand towards replication fork
(c) The leading strand away from replication fork
(d) The lagging strand away from the replication fork

 ANS D
11. Intensely lactating mothers do not generally conceive due to the
(a) suppression of gonadotropins.
(b) hyper secretion of gonadotropins.
(c) suppression of gametic transport.
(d) suppression of fertilisation.		  ANS A
12. In which of the following organisms is male heterogamety observed?
(i) Grasshopper (ii) Honey bee (iii) Fowl
Choose the correct option:
(a) (i) and (ii)     (c) (i) and (iv)
(b) (ii) and (iii)   (d) (iii) and (iv)		  ANS A
13. Which ecosystem has the maximum biomass?
(a) Forest ecosystem         (c) Pond ecosystem
(b) Grassland ecosystem   (d) Lake ecosystem		  ANS A
14. Eukaryotic RNA polymerase III catalyses the synthesis of
(a) mRNA   (c) hnRNA
(b) rRNA     (d) tRNA		  ANS D
15. The process of separation and purification of the expressed (recombinant) protein before marketing, is called
(a) upstream processing
(b) downstream processing
(c) bioprocessing
(d) post-production processing		  ANS B
16. What is the criterion for DNA fragments movement on agarose gel during gel electrophoresis?
(a) The larger the fragment size, the farther it moves
(b) The smaller the fragment size, the farther it moves
(c) Positively charged fragments move to farther end
(d) Negatively charged fragments do not move		  ANS B

17. Transplantation of tissues/organs fails often due to non-acceptance by the patient's body. Which type of immune- response is responsible for such rejections?
(a) Autoimmune response
(b) Cell-mediated immune response
(c) Hormonal immune response
(d) Physiological immune response

 ANS B
18. Ozone hole is the largest over
(a) Africa            (c) America
(b) Antarctica     (d) Europe		  ANS B
19. A gene, whose expression helps to identify transformed cells is known as
(a) selectable marker
(b) vector
(c) plasmid
(d) structural gene		  ANS A
20. The process of translation of mRNA to proteins begins as soon as
(a) the small subunit of the ribosome encounters mRNA. .
(b) the larger subunit of the ribosome encounters mRNA.
(c) both the subunits join together to bind with mRNA.
(d) the tRNA is activated and the larger subunit of ribosome encounters mRNA.		  ANS A
21. Which of the following is correctly matched for the product produced by them?
(a) Acetobacter aceti: Antibiotics
(b) Methanobacterium: Lactic acid
(c) Penicillium notatum: Acetic acid
(d) Saccharomyces cerevisiae: Ethanol		  ANS D
22. The development of fruits without fertilisation of the ovary, is called
(a) parthenogenesis
(b) parthenocarpy
(c) agamospermy
(d) apomixis		  ANS B
23. Identify the type of argument for biodiversity conservation for each of the following statements and select the correct option.
1. Ecosystem services provided by nature such asaesthetic value, pollination of crops, etc.
2. Direct economic benefits derived from nature such as food, fibre, firewood, etc.
3. Every species has an intrinsic value, even if it is not of any economic use to humans.
(a) 1. Ethical, 2. Broadly utilitarian, 3. Narrowly utilitarian.
(b) 1. Broadly utilitarian, 2. Narrowly utilitarian, 3. Ethical.
(c) 1. Broadly utilitarian, 2. Ethical, 3. Narrowly utilitarian,
(d) 1. Narrowly utilitarian, 2.Broadly utilitarian, 3. Ethical.		  ANS B
24. The DNA fragments separated on an agarose gel can be visualised after staining with
(a) bromophenol blue
(b) acetocarmine
(c) aniline blue
(d) ethidium bromide.		  ANS D
25. A disease caused by an autosomal primary non-disjunction is
(a) Down's syndrome
(b) Klinefelter's syndrome
(c) Turner's syndrome
(d) Sickle-cell anaemia		  ANS A

26. Study the pedigree given below and select the probable mode of inheritance and a human trait that follows this pattern of inheritance,

(a) Autosomal recessive, sickle cell anaemia
(b) Sex linked recessive, Haemophilia
(c) Autosomal dominant, Myotonic dystrophy
(d) Sex linked dominant, colour blindness

 ANS A

27. The oral contraceptive pills mainly contain the hormones
(a) estrogen and luteinising hormone.

(b) progesterone and estrogen.

(c) estrogens and follicle- stimulating hormone.

(d) progesterone and follicle- stimulating hormone.

 ANS B
28. Meiotic division of the secondary oocyte is completed
(a) prior to ovulation
(b) at the time of copulation
(c) after zygote formation
(d) at the time of fusion of a sperm with an ovum.		  ANS D

29. In rice fields, a nitrogen- fixing bacterium associated with the fern Azolla is
(a) Rhizobium   (c) Anabaena
(b) Spirulina     (d) Frankia

 ANS C
30. The terms homothallic and monoecious are used to denote
(a) unisexual condition
(b) bisexual condition
(c) staminate flowers
(d) pistillate flowers.		  ANS B
31. In livestock breeding experiments, which of the following stages are transferred to surrogate mothers?
(a) 8 to 32 celled embryo
(b) Frozen semen
(c) Unfertilised eggs
(d) Fertilised eggs		  ANS A

32. There is no cell division involved in
(a) spermatogenesis

(b) oogenesis

(c) embryogenesis

(d) spermiogenesis

 ANS D
33. In Pisum sativum, the pod colour may be green (G) or yellow (g). What percentage of offspringwith green pod colour trait would be obtained in a cross of Gg × Gg?
(a) 25% (c) 75%
(b) 50% (d) 90%		  ANS C
34. Malarial fever is caused by a poisonous chemical that causes chills and a high fever that reoccurs
every 3-4 days
(a) Haemozoin  (c) Hirudin
(b) Interferon   (d) Colostrum		  ANS A
35. The Earth Summit held in Rio de Janeiro in 1992 was called
(a) for immediate steps to discontinue use of CFCs that were damaging the ozone layer
(b) to reduce CO2 emissions and global warming
(c) for conservation of biodiversity and sustainable utilisation of its benefits
(d) to assess threat posed to native species by invasive weed species.		  ANS B
36. The production of gametes by the parents, formation or zygotes, the F, and F, plants, can be understood from a diagram called
(a) net square      (c) punch square
(b) bullet square  (d) Punnett square		  ANS D
37. The human chromosome with the highest and the least number of genes in them are respectively
(a) Chromosome 21 and Y
(b) Chromosome 1 and X
(c) Chromosome 1 and Y
(d) Chromosome X and Y		  ANS C
38. Darwin's finches are an excellent example of
(a) seasonal migration
(b) brood parasitism
(c) adaptive radiation
(d) connecting links		  ANS C
39. By which method was a new bread ‘Hisardale' of sheep formed by using Bikaneri ewes and Merino rams?
(a) Outcrossing
(b) Mutational breeding
(c) Cross breeding
(d) Inbreeding		  ANS C
40. Analogous organs arise due to
(a) divergent evolution
(b) artificial selection
(c) genetic drift
(d) convergent evolution		  ANS D

41. Which off the following is an example of mutation breeding?
(a) Mung bean, resistant to yellow mosaic virus

(b) Pusa Sadabahar, resistant to chilli mosaic virus

(c) Pusa Gaurav, resistant to aphids

(d) Pusa Swarnim, resistant to white rust

 ANS A
42. The fact that a purine base always pairs through hydrogen bonds with a pyrimidine base leads to, in the DNA double helix
(a) the antiparallel nature
(b) the semiconservative nature
(c) uniform width throughout DNA
(d) uniform length in all DNA.		  ANS C
43. The net electric charge on DNA and histone, is
(a) positive, negative
(b) negative, positive
(c) negative, negative
(d) positive, positive		  ANS B
44. Which of the following organisation is responsible for maintaining the Red Data Book?
(a) IDRI
(b) IUCN
(c) UNESCO
(d) USDA'		  ANS B
45. In the immune system, interferons are a part of
(a) physiological barriers
(b) cellular barriers
(c) physical barriers
(d) cytokine barriers		  ANS D
46. In a breeding experiment, the selected male parent is diploid and the female parent is tetraploid. What will be the ploidy level of theendosperm that will develop after
double fertilisation?
(a) Diploid   (c) Tetraploid
(b) Triploid  (d) Pentaploid		  ANS D
47. Peripatus is a connecting link between
(a) mollusca and echinodermata
(b) annelida and arthropoda
(c) coelenterata and porifera
(d) ctenophora and platyhelminthes		  ANS B
48. Which of the following alcoholic beverages is made without the use of distillation?
(a) Whisky    (c) Brandy
(b) Wine        (d) Rum		  ANS B 

49. Tobacco use is known to increase adrenaline and nor- adrenaline secretion. This might be caused by a component called
(a) Tannic acid   (c) Catechin
(b) Curamin       (d) Nicotine

 ANS D
50. If the length of DNA molecule is 1.11 metres, what will be the approximate number of base pairs?
(a) 3.3 × 109 bp
(b) 6.6 × 109.bp
(c) 3.3 x 106 bp
(d) 6.6 x 106 bp		  ANS A