Question

Match the following genes of the lac operon listed in column ‘A’ with their respective products listed in column ‘B’:
\[ \begin{array}{|c|c|} \hline \textbf{A: Gene} & \textbf{B: Products} \\ \hline \text{a. ‘i’ gene} & \text{(i) β-galactosidase} \\ \text{b. ‘z’ gene} & \text{(ii) lac permease} \\ \text{c. ‘a’ gene} & \text{(iii) repressor} \\ \text{d. ‘y’ gene} & \text{(iv) transacetylase} \\ \hline \end{array} \] Select the correct option:

• A. (i) (iii) (ii) (iv)
• B. (iii) (i) (ii) (iv)
• C. (iii) (i) (iv) (ii)
• D. (iii) (iv) (i) (ii)

Hint:

The lac operon is an inducible operon that regulates lactose metabolism in prokaryotes.

Answer 1

The Correct Option is C

Step 1: Functions of the lac operon genes. 
- 'i' gene: Produces the repressor protein (iii). 
- 'z' gene: Produces $\beta$-galactosidase (i), which breaks down lactose. 
- 'a' gene: Produces transacetylase (iv). 
- 'y' gene: Produces lac permease (ii), which facilitates lactose entry into the cell.