32. The primary source of energy in an ecosystem

(a) Sunlight (b) Glucose (c) Protein (d) ATP.

33. 'V' shaped chromosomes are

(a) Metacentric (b) Sub metacentric (c) Acrocentric (d) None of these

34. 'White rust' disease is caused by :

(a) Ascobolus (b) Rhizopus (c) Albugo (d) Puccinea

35. Synecology is the study of:

A.) Biotic community B.) Individual species C.) Study of environment D.) None

36. [Advance Q] The latent period b/w supra threshold stimulation and recording of action potential at a distance of 10cm in a nerve is 10 msec. The rate of conduction of action potential is

(A) 1 m/sec (B) 0.1 m/sec (C) 10 m/sec (D) 100 m/sec

37. Ghrelin is

A. enzyme released by kidney B. peptide secreted in the stomach C. hormone released by the kidney D. None of the above

38. Depletion of Ozone layer in atmosphere is primarily due to chemical reaction with chlorofluorocarbons or an oxide of Nitrogen. which is

(a) N2O (b) NO (c) N2O3 (d) NO2

39. Which of the following is given as a wedding gift in Japan:

(A) Metridium (B) Hylonema (C) Ambystoma (D) Euplectella

40. PCR is exclusively used for

(a) DNA identification (b) DNA recombination (c) DNA amplification. (d) DNA repair

41. The unique feature of the enzyme Taq polymerase used in PCR is

(a) High Speed. (b) High fidelity (c) High thermal stability (d) Low thermal stability.

42. Maxam Gilbert and Sanger dideoxy methods are concerned with

(a) DNA amplification (b) DNA damage (c) DNA repair (d) DNA Sequencing

43. Who first correctly defined the term ecology?

A.) Taylor B.) Tansley C.) Haeckel D.) Odum

44. If kite feed on mice and mice feed on grass, the kite must be:

A.) Secondary consumer B.) Primary producer C.) Primary consumer D.) Secondary producer

45. Poisonous fluid present in nematocyst of Hydra is.

(a) Hypotoxin (b) Haernatin (c) Haernozoin (d) Agglutinogen

46. Bacteria with a tuft of flagella at one end, are called as

(a) Lophotrichous (b) Amphi trichous (c) Cephalotri chous (d) Peritrichous

47. Polyacrylamide gel electrophoresis (PAGE) is used for DNA sequencing because, it

(a) Can separate different DNAs. (b) Can resolve DNA molecules differing in length (c) Can break DNA into small fragments. (d) Can separate purines and pyrimidine.

48. Isoelectric point is a point at which

(a) The mass of protein is maximum. (b) The net charge of protein is zero. (c) The speed of mobility is maximum. (d) The protein loses its structure.

49. A plankton is:

A.) Layers of aquatics B.) Sea scum C.) Floating vegetation D.) Floating microscopic plants & animals

50. Which biome is treeless:

A.) Savannah B.) Chaparrals C.) Temperate D.) Tundra

51. In plants Indole acetic acid (IAA) causes cell elongation due to-

(a) Increase in pH of Apoplast (b) Increase in pH of cytoplasm (c) Decrease in pH of Apoplast (d) Increase in pH of cytoplasm