Match List I with List II. List I List II --- --- A. Gene ‘ a ’ I. β -galactosidase B. Gene ' y ' II. Transacetylase C. Gene ' i ' III. Permease D. Gene ' z ' IV. Repressor protein Choose the correct answer from the options given below:

Botany · Molecular basis of Inheritance

NEET (UG) 2023 — Question 140

Match List I with List II.

List I	List II
A. Gene ‘ $a$ ’	I. $\beta$ -galactosidase
B. Gene ' $y$ '	II. Transacetylase
C. Gene ' $i$ '	III. Permease
D. Gene ' $z$ '	IV. Repressor protein

Choose the correct answer from the options given below:

Option A:
A-II, B-III, C-IV, D-I
Correct
Option B:
A-III, B-IV, C-I, D-II
Option C:
A-III, B-I, C-IV, D-II
Option D:
A-II, B-I, C-IV, D-III

Answer: A

Step-by-step solution

The lac operon consists of a regulatory gene $i$ and three structural genes $z, y, a$ . Gene $i$ codes for the repressor protein, so C matches IV. Gene $z$ codes for $\beta$ -galactosidase, so D matches I. Gene $y$ codes for permease, so B matches III. Gene $a$ codes for transacetylase, so A matches II. Thus the correct matching is A-II, B-III, C-IV, D-I, i.e. option A.

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Exam: NEET (UG) 2023
Paper: 2023 paper
Subject: Botany
Chapter: Molecular basis of Inheritance
Topic: Regulation of Gene Expression

Answer: A

Step-by-step solution

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