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Q. Purines possess nitrogen at : 1, 2, 4 and 6 position 1, 3, 5 and 7 position 1, 3, 7, and 9 position 1, 2, 6 and 8 position…

(a) AUG (b) AUC (c) ACU (d) ACA Solution : Correct option : A AUG is a dual function codon: it codes for methionine and it also acts as a initiator…

Q. In lac operon system, i gene codes for : (a) Inducer of lac operon (b) Repressor of lac operon (c) Hydrolysis and disaccharide (d) Permease Solution : Correct option…

Q. The lac operon consists of : (a) Four regulatory genes only. (b) One regulatory gene and three structural genes. (c) Two regulatory genes and two structural genes. (d) Three…