Indian Institute of Information Technology 2006 Entrance Exams IIT Entrance Exams JAM BIOTECHNOLOGY TEST - Question Paper

39. G-proteins are involved in relaying signals through G-protein linked receptors. Which of the subsequent forms of G-protein is considered to be in active state?
(A) G-protein - ADP (B) G-protein - ATP (C) G-protein - GDP (D) G-protein - GTP
40. select the accurate match from A, B, C & D

Group I Group II
P. Epinephrine 1. Uterine contractions
Q. Parathormone 2. Water resorption
R. Oxytocin 3. Ca2+ uptake
S. Luteinizing hormone 4. Glycogen breakdown
5. Thyroid hormone synthesis
6. Progesterone secretion

(A) (B) (C) (D)
P-1 P-5 P-5 P-4
Q-2 Q-6 Q-2 Q-3
R-5 R-1 R-3 R-1
S-6 S-2 S-4 S-6
41. The ‘A’ fragment of diphtheria toxin catalyzes the addition of an ADP-ribose group to the eukaryotic elongation factor EF-2. The source for the ADP-ribose group is
(A) FAD (B) FMN (C) NAD+ (D) NADP+

42. The nucleotide sequence of DNA involved in binding to a transcription factor can be determined by
(A) DNA footprinting
(B) S1 nuclease treatment (C) DNA fingerprinting (D) Northern hybridization
43. A culture of Mycobacterium leprae was subjected to alkaline ethanol extraction prior to acid fast staining. The colour of the culture subsequent staining will be
(A) Red
(B) Green (C) Yellow (D) Blue
44. The primer of the lagging strand during DNA replication is removed by
(A) 3’ to 5’ exonuclease activity of DNA polymerase III (B) DNA primase
(C) 5’ to 3’ exonuclease activity of DNA polymerase I (D) 3’ to 5’ exonuclease activity of DNA polymerase I
45. Compare the CH3-C bond lengths in propene with that of ethane
(A) bond length shorter in propene
(B) bond lengths are equal
(C) bond length longer in propene
(D) bond lengths cannot be compared
46. 2,4-Dimethylcyclobutane-1,3-dicarboxylic acid is optically inactive because it has

CH3

CO2H



H H H H




(A) plane of symmetry

CO2H

CH3

(B) centre of symmetry
(C) the capability of rotating plane polarized light

Earning:   Approval pending.