Physics NEET Full Syllabus Mock Test 180 Question New Syllabus Mock Test - 1 PCB MCQ (Single Correct)

Match the following columns

Column -I

Column - II

(Examples)

Column - II

(Examples)

Column - II

(Examples)

A

Z gene

i

Lactose

Permease

Lactose

Permease

Lactose

Permease

B

Y gene

ii

Galactoside

Transacetylase

Galactoside

Transacetylase

Galactoside

Transacetylase

C

A gene

iii

Peptidyl

Transferase

Peptidyl

Transferase

Peptidyl

Transferase

iv

-galactosidase

A B C

A
iv I ii
B
ii iii i
C
ii I iii
D
iii ii i

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Text Solution

Verified by Experts
The correct answer is:
A

The gene codes for beta-galactosidase ( -gal), which is primarily responsible for the hydrolysis of the disaccharide, lactose into its monomeric units, galactose and glucose. The gene codes for permease, which increases permeability of the cell to -galactosides. The A gene encodes a transacetylase. Hence, all the three gene products in lac operon are required for metabolism of
lactose.

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