| Column-I | Column-II | ||
| A. | \[\beta \text{-}\]galactosidase | 1. | Joining of DNA fragments |
| B. | Permease | 2. | Peptide bond formation |
| C. | Ligase | 3. | Hydrolysis of lactose |
| D. | Ribozyme | 4. | Increases permeability to \[\beta \text{-}\]galactosidase |
A) A-2 B-1 C-4 D-3
B) A-3 B-2 C-1 D-4
C) A-2 B-4 C-1 D-3
D) A-1 B-2 C-4 D-3
Correct Answer: B
Solution :
\[\beta \text{-}\]gal, coded by Z structural gene is primarily responsible for the hydrolysis of the diasaccharide lactose into its monomeric units, galactose and glucose.
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