Home Biology Biotechnology Principles and Processes NCERT The enzymes responsible for restricting the …
Biology Biotechnology Principles and Processes NCERT Single Correct MCQ
Published on: August 11, 2026

The enzymes responsible for restricting the growth of bacteriophage in E-coli were isolated in 1963, these enzyme are:

A
DNA ligases
B
Alkaline phosphatases
C
DNA polymerases
D
Restriction endonuclease

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The correct answer is:
D

In 1963, scientists discovered enzymes in E. coli that could cut foreign bacteriophage DNA and restrict its growth. These enzymes were named: Restriction endonucleases.

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