51. Aminoacids lysine, serine and arginine are coded by how many codons ?
A. 6, 4, and 3 respectively
B. 4, 2 and 2 respectively
C. 6 codons
D. 4 codons
Answer : Option C
52. Which of the following amino acid is coded by 3 codons ?
53. How many nucleotides make one okazaki segment in eukaryotes ?
54. Which of the following enzymes help in the process of formation of phosphodiester bond during reverse transcription ?
A. DNA - dependant RNA polymerase
B. DNA dependant DNA polymerase
C. RNA - dependant RNA polymerase
D. RNA - dependant DNA polymerase
Answer : Option D
55. The two strands of a DNA molecule are separted and one of them is analysed for its A + T / G + C ratio, This is found to be 0.2 What is the A + T / G + C ratio of the other strand
56. .DNA replication in lagging strand of most of the eukaryotic organisms is
A. conservative and continuous
B. semi conservative but discontinuous
C. conservative and semi - discontinuous
D. semi conservative but continuous
Answer : Option B
57. How many bases consist in an average gene ?
Match the following using salient features of Human genome project
A B
(P) Less than 2 % genome (i) 3 billion nucleotide bases
(Q) Chromosome 1 (ii) 231 genes
(R) Y chromosome (iii) 2968 genes
(S) Human genome (iv) codes for protein
A. (P - iv) (Q - iii) ( R - ii) ( S - i)
B. ( P - iv) (Q - ii) (R - iii) (S - i)
C. (P - iv) (Q - i) (R - ii) (S - iii)
D. (P - i) (Q - iii) (R - iv) (S - ii)
Answer : Option A
59. State the use of moleculer medicine ?
A. Improves diagnosis of diseases
B. Used as gene theraphy
C. Used to understand several diseass like Alzheimer’s Parkinsons diseases etc.,
D. All the above
Answer : Option D
60. Among the following which is used for separation of DNA fragments ?
A. centifugation
B. Cell fractionation
C. Cell homogenation
D. Electrophoresis
Answer : Option D