Match List - I with List - II. Choose the correct answer from the options given below
- (a) - (iii), (b) - (i), (c) - (iv), (d) - (ii)
- (a) - (iii), (b) - (ii), (c) - (i), (d) - (iv)
- (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
- (a) - (iv), (b) - (i), (c) - (iii), (d) - (ii)
Answer
(3) (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i)
Solution
As per NCERT, in the lac operon:
(a) i gene (regulator gene) codes for the repressor of the lac operon ⇒ (iv).
(b) z gene codes for β-galactosidase, which hydrolyses lactose into galactose and glucose ⇒ (iii).
(c) y gene codes for permease, which increases permeability of the cell to lactose ⇒ (ii).
(d) a gene codes for transacetylase ⇒ (i).
∴ (a) - (iv), (b) - (iii), (c) - (ii), (d) - (i).
Answer: (3)