Question

Match the following \begin{table}[h!] \centering \begin{tabular}{|l|l|} \hline List - I & List - II
\hline A. Operator site & I. Binding site for RNA polymerase
B. Promoter site & II. Binding site for repressor
C. Regulator gene & III. Codes for Enzyme
D. Structural gene & IV. Codes for repressor
\hline \end{tabular} \caption{Matching the following} \end{table} The correct answer is

• A. \( \text{A-I, B-IV, C-II, D-III} \)
• B. \( \text{A-I, B-II, C-IV, D-III} \)
• C. \( \text{A-II, B-I, C-III, D-IV} \)
• D. \( \text{A-II, B-I, C-IV, D-III} \)

Hint:

The promoter and operator sites are key elements in the regulation of gene expression. The promoter is where RNA polymerase binds to initiate transcription, and the operator can be bound by a repressor to block transcription.

Answer 1

The Correct Option is D

Step 1: The operator site (A) is the binding site for RNA polymerase, which is involved in transcription. Therefore, A corresponds to II.
Step 2: The promoter site (B) is the binding site for RNA polymerase, and it initiates transcription. Hence, B corresponds to I.
Step 3: The regulator gene (C) codes for an enzyme, so C corresponds to IV.
Step 4: The structural gene (D) codes for the repressor protein, and thus D corresponds to III.
Thus, the correct matching is A-II, B-I, C-IV, D-III.