Zoology Practice Tests

8/16/2019 Zoology Practice Tests

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Which of the statements given above is/are correct?(a) 1 only(b) 1 and 2(c) 2 and 3(d) 1, 2 and 3

Ans. (d)

7. The sequence of t ransfer of electrons during biological oxidation of a substrate in

mitochondrion is:(a) NAD ? Cytochrome-a ? Cytochrome-c ?O2(b) FAD ? Cytochrome-c ?Cytochrome-b ? NAD ? C2(c) NAD ? FAD ? Cytochrome-b ? Cytochrome-c ? Cytochrome a3?O2(d) FAD ? NAD ? Cytochrome-c ? Cytochrome-a3? O2

Ans. (c)

8. Which one of the following categories of enzymes converts t riglycerides into glycerol andfatt y acids?(a) Hydrolase(b) Lyases

(c) Oxidoreductase(d) Transferase

Ans. (a)

9. Match list-I (human hormone) with list-II (target organ) and select the correct answer usingthe codes given below the lists:List-I List-II(Human hormone) (Target organ)

A. Cholecystokinin 1. Bone marrowB. Erythropoietin 2. StomachC. Enterogastrin 3. Gall bladder

Codes: A B C(a) 2 1 3(b) 1 3 2(c) 3 2 1(d) 3 1 2

Ans. (d)

10. Consider the following statementsParasympathet ic nervous system is characterized by1. acetylcholine as neurot ransmit ter

2. ‘f ight or f light’ activities3. longer preganglionic f ibres4. longer postganglionic fibres.5. arising from cranio-sacral portionWhich of the statements given above are correct?(a) 1, 2 and 3(b) 2 and 4(c) 1, 3 and 5(d) 2, 3 and 5

Ans. (c)

11. Which one of the following increases the uptake of sodium ions and water in the kidneywith simultaneous eliminat ion of pot assium ions?(a) Vasopressin(b) Renin(c) Parathormone


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(d) Aldosterone Ans. (d)

12. If the glomerular capillary pressure is 60 mm Hg, the pressure in Bowman’s space 10 mm Hgand osmot ic pressure 30 mm Hg, what would be the effective f ilt ration pressure?(a) 20 mm Hg(b) 40 mm Hg(c) 60 mm Hg

(d) 80 mm Hg Ans. (a)

13. Which one of the following is not under the direct control of pituitary gland with respect tothe regulation of its secretory function?(a) Adrenal cortex(b) Adrenal medulla(c) Thyroid(d) Testis

Ans. (c)

14. Consider the following statements1. the secretions of adrenal cortex include estrogens2. progesterone enhances breast development during pregnancyWhich of the statements given above is/are correct?(a) 1 only(b) 2 only(c) Both 1 and 2(c) Neither 1 nor 2

Ans (b)

15. How many molecules of ATP would by synthesized if one pyruvate molecule passes

through the oxidative steps?(a) 12(b) 14(c) 24(d) 28

Ans. (a)

16. Consider the following:1. malate2. succinate3. fumarate

What is the correct sequence of the above metabolites in cit ric acid cycle?(a) 1-2-3(b) 2-1-3(c) 3-2-1(d) 2-3-1

Ans. (d)

17. The hormones responsible for the “fight-or-f light” response are(a) cort isol and aldosterone(b) corticosterone and aldosterone(c) aldosterone and nor-adrenalin

(d) adrenalin and nor-adrenalin Ans. (d)

18. Consider the following statements1. Chymotrypsinogen is converted into chymot rypsin by trypsin


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2. Cholecystokinin is secreted by stomach3. Pepsin acts on pept ide linkage in which tyrosine and phenylalanine are involvedWhich of the statements given above are correct?(a) 1 and 2(b) 2 and 3(c) l and 3(d) 1, 2 and 3

Ans. (c)

19. In glycolysis, which one of the following is the substrate for the enzyme enolase?(a) Fructose 1-5 biphosphate(b) 3-phosphoglyceraldehyde(c) 1, 3-biphosphoglyceric acid(d) 2-phosphoglyceric acid

Ans. (d)

20. Consider the following hormones1. Thyrotrophin Releasing Hormone (TRH)2. Thyroid Stimulating Hormone (TSH)

3. Thyroxine (T4)What is the correct sequence of the releases of these hormones?(a) 1-2-3(b) 2-1-3(c) 2-3-1(d) 1-3-2

Ans. (a)

21. How many fused hydrocarbon rings does the steroid nucleus consist of?(a) Two(b) Three

(c) Four (d) Six

Ans. (c)

22. Which one of the following statements is correct?(a) Perilymph is positively charged and endolymph i negat ively charged(b) Perilymph and endo lymph are positively charged(c) Perilymph is negat ively charged and endolymph is positively charged(d) Perilymph and endo lymph are negat ively charged

Ans. (a)

23. Consider the following statementsThe tert iary structure of proteins is stabilized by—1. disulphide linkage2. hydrogen bonding3. electrostat ic bonds between posit ively and negat ively charged groups 4Which of the statements given above are correct?(a) 1 and 2(b) 2 and 3(c) l and 3(d) 1, 2 and 3

Ans. (d)

24. Consider the following amino acids:1. Arginine2. Alanine3. Histidine


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Which of the above amino acids are polar in nature(a) 1 and 2 only(b) 2 and 3 only(c) 1 and 3 only(d) 1, 2 and 3

Ans. (a)

25. In which one of the following is found a single eustachian opening in the middle of roof

behind internal snares?(a) Frog(b) Lizard(c) Pigeon(d) Rabbit

Ans. (c)

26. Consider the following statements:1. The eyeball of rabbit is moved in the orbit by four sets of muscles and the eyeball of f rog ismoved by three sets of muscles.2. The pect in in the eye is more developed in diurnal birds than in nocturnal birds.

Which of the statements given above is /are correct?(a) 1 onlyb) 2 only(c) Both 1 and 2(d) Neither 1 nor 2

Ans. (d)

27. The hormone cortisone is a(a) carbohydrate(b) fat ty acid(c) polypeptide

(d) steroid Ans. (b)

28. Which one of the following pairs is not correctly matched?(a) Pineal body : Dopamine(b) Leydig cells : Androgen(c) Intestine : Secret in(d) Neurohypophysis : Oxytocin

Ans. (a)

29. What is the role of secret in from the following?

(a) It stimulates the testis to secrete testosterone(b) It st imulates stomach to release HCI(c) It st imulates pancreas to secrete the digestive enzymes(d) It st imulates spleen to release the stored RBC

Ans. (c)

30. The synthesis of plasma albumin is done by(a) liver (b) muscle cells(c) pancreas(d) spleen

Ans. (a)

31. Consider the following statements:The most important role of folic acid in promoting growt h is through:1. Conversion of decarboxylated pyruvic acid into acetyl Co-A


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2. Synthesis of purines are thymine essential for DNA synthesis3. Calcium deposit ion in bonesWhich of the statements given above is/are correct?(a) l and 2 only(b) 2 only(c) 1 and 3 only(d) 3 only

Ans. (b)

32. Which one o f the following sensations is not generated by impulses initiated in naked nerveendings?(a) Touch(b) Pain(c) Cold(d) Taste

Ans. (d)

33. Match list-I (organism) with list-II (excretion) and select the correct answer using the codesgiven below t he lists:

List-I List-Il(Organism) (Excret ion)

A. Shark 1. Uric acidB. Lizard 2. UreaC. Rat 3. AmmoniaCodes:

A B C(a) 3 1 2(b) 2 1 3(c) 3 2 1(d) 1 3 2

Ans. (a)

34. In glycolysis, which enzyme acts on 2-phospho.glycerate t o form phosphoenol pyruvate?(a) Aldolase(b) Enolase(c) Phosphoglycerokinase(d) Phosphoglyceromutase

Ans. (a)

35. In the vertebrates, the hormones which control osmoregulation are(a) vasopressin and thyrotropin

(b) aldosterone and corticotropin(c) thyrot ropin and cort icot ropin(d) vasopressin and aldost erone

Ans. (d)

36. Which one of the following vitamins is the precursor of Co-enzyme-A?(a) Pantot henic acid(b) Pyridoxamine(c) Ribof lavin(d) Thiamine

Ans. (a)

37. Nicotinic acid can be synthesized biologically from(a) glutamic acid(b) aspartic acid(c) tyrosine


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(d) t ryptophan Ans. (a)

38. With reference to mitochondrial ‘Electron Transport Chain’.Which one of the fo llowing statements is correct?(a) Ubiquinone can carry two electrons and two protons simultaneously(b) The electrons that each molecule of NADH cont ributes to the mitochondrial electrontransport chain provide enough power to create t wo ATPs

(c) The cont ribution of FADH2 provides enough power for the production o f three ATPs(d) Cytochrome-b and cytochrome-c1 are parts of an enzyme complex known as cytochromeoxidase

Ans. (c)

39. Consider the following statements:1. ATP cannot be stored in the cell.2. ATP can be moved f rom one cell to another 3. NAD+ picks up two electrons at once.Which of the statements given above is / are correct?(a) 1 only

(b) 2 and 3 only(c) 1 and 3 only(d) l, 2 and 3

Ans. (b)

40. Which one of the following hormones cont rols gluconeogenesis?(a) Thyroxine(b) Insulin(c) Cort isol(d) Glucagon

Ans. (d)

41. Dietary carotenes and carot enoids are absorbed and t ransported in the plasma of higher mammals by:(a) albumins(b) globulins(c) lipoproteins(d) glycoprot eins

Ans. (b)

42. Consider the following statements:In Citric Acid Cycle

1. The generation of ATP is done at two steps2. NAD is reduced to NADH at t wo steps3. FAD is reduced to FADH2 at one stepsWhich of the statements given above is/are correct?(a) 1 and 2 only(b) 3 only(c) 1 and 3 only(d) 1, 2 and 3

Ans.(b)

43. Prot eins also release the energy in our body but before that their deamination is carried out

in:(a) spleen(b) muscles(c) lungs(d) liver


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Ans. (d)

44. Consider the following processes:1. Generation of cytotoxic T-cells2. Stimulation of interferon release3. Formation of bursin4. Release of opsinWhich of the above are the functions in mammalian t issues performed by interleukin (T-cell

growth factor) which is secreted by certain activated T-lymphocytes?(a) 1 and 2 only(b) 1 and 3 only(c) 2 and 3 only(d) 3 and 4 only

Ans. (a)

45. Which one of the following is a tyrosine derivate?(a) Insulin(b) Growth hormone(c) Oxytocin

(d) Thyroxine Ans. (d)

46. With reference to sucrose, consider the fo llowing statements:1. Sucrose is a non-reducing sugar.2. The linkage in it is an a2 — B1 glycosidic bond.3. It is a disaccharide having a-glucose and B —fructose.Which of the statements given above is / are correct?(a) 1 only(b) 2 and 3 only(c) 1 and 3 only

(d) 1, 2 and 3 Ans. (d)

47. Consider the following enzymes:1. ATPase2. Acid phosphatase3. Glucose-6 phosphataseWhich of the above enzymes is/are present in the Gol complex of animal cells?(a) 1 only(b) 2 and 3 only(c) 1 and 3 only

(d) 1,2 and 3 Ans. (d)

48. Which among t he following are the precursor amino acids for purines?(a) Arginine and Tyrosine(b) Aspartate and Glycine(c) Histidine and Tyrosine(d) Methionine and Tryptophan

Ans. (a)

49. Which one among the following amino acids cannot participate in alpha-helical formation?

(a) Histidine(b) Proline(c) Theronine(d) All of the above

Ans. (b)


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50. Match list-I with list-II and select the correct answer using the code given below t he lists:List-I List-II(Hormone) (Function)

A. Vasopressin 1. Regulat ion of pelvic ligamentB. Parathormone 2. MoultingC. Ecdysone 3. Increase in blood pressureD. Relaxin 4. Regulat ion of Ca2+ in boneCodes:

A B C D(a) 3 4 2 1(b) 3 2 4 1(c) 1 4 2 3(d) 1 2 4 3

Ans. (a)

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Zoology Practice Tests