CSIR-UGC NET/JRF LIFE SCIENCE EXAM.DECEMBER 2014 SOLVED PAPER WITH DESCRIPTION Q.NO. 41 to 50

CSIR UGC NET LIFE SCIENCE EXAM. DEC.2014QUESTION NO. 30 TO 40 WITH SOLUTION

41. Light is the dominant enviromental signal that conrols stomatal movement in leaves of well- watered plants grown in natural environment.Which one of the following wavelengths of light is responsible for such regulation?
(a) Red light                                (b) Blue light
(c) Green light                             (d) Far red light
Answer-B

Q42.Which one of the following is not the main factor that contributes to water potential during plant growth under normal conditions?
(a) Solute potential
(b) Hydrostatic pressure
(c) Gravity
(d) Temperature
Answer-D

Q43.Which one of the following cell is the renal corpuscle can influence Glomerular filtration by its contraction?
(a) Podocytes
(b) Endothelial cells of glomerular capillaries
(c) Parietal epithelial cells of Bowman's capdule
(d) Mesangial cells
Answer-D

Q44. Production of excessive amount of corticotropin (ACTH) occurs in which one of the following-
(a) Grave's disease
(b) Cushing's syndrome
(c) Grieg's syndrome
(d) Alport's syndrome
Answer-B
Description- Excess production of corticotropin (ACTH)- Cushing syndrome.

Q45. The plant hormone indole-3-acyetic acid (IAA) is present in most plants. The structure of this hormone is related to which one of the following amino acid?
(a)Glutamic acid
(b) Asparatic acid
(c) Lysine
(d) Tryptophan
Answer-D

Q46. The type one glomus cells present in the carotid bodies contain granules which release some substances during hypoxia. Which one of the following is released in hypoxia?
(a) Serotonin  
(b) GABA
(c) Dopamine
(d) IL 8
Answer-C

Q47.Lndividuals with greater mass have a smaller surface area to volume ratio, which helps to conserve heat. This is known as-
(a) Leibig's rule 
(b) Cope's rule
(c) Gloger's rule
(d) Bergmann's rule
Answer-D

Q48. Which one of the following is not a characteristic property of carotenoids?
(a) They possess complex porphyrin ring
(b) They are integral constituent of thylakoid membrane
(c) They are also called accessory pigments
(d) They protect plants from damages caused by light
Answer-A

Q49.5-Bromouracil is a base analog that can cause mutation when incorporated into DNA. Which of the following is the most likely change that 5- Bromouracil induces-
(a) T: A to C:G
(B) T: A to A:T
(c) G:C to T:A
(d) C:G to A: T
Answer-A

Q50. The following pedigree shoes the inheritance of a common phenotype controlled by an autosomal recessive allele. The probability of carriers in the population is 1/3-

Which is the probability that a child from parents II-3 and II-4 will show the phenotype?
(a)1/16
(b) 1/18
(c) 1/36
(d) 3/16
Answer-B

CSIR UGC NET / JRF LIFE SCIENCE DEC.2014 EXAM PAPER QUESTION NO. 51 TO 60