Biology Biotechnology Principles and Processes Cloning Vectors and Competent Host Single Correct MCQ
Published on: August 13, 2026

DNA of a bacterium is not cleaved by its own restriction enzymes because the recognition DMA sequences are

A
methylated
B
deleted
C
bound by inhibitory proteins
D
not accessible to restriction enzymes

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Text Solution

Verified by Experts
The correct answer is:
A

Bacterial DNA is protected from its own restriction enzymes because the recognition sites are methylated by methylase enzymes. Restriction enzymes cannot cut these methylated sequences.

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