Biology Biotechnology Principles and Processes All Topic Question For Revision Test Single Correct MCQ
Published on: August 11, 2026

The enzyme used for joining two DNA fragments is called

A
ligase
B
restriction endonuclease
C
DNA polymerase
D
gyrase

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Text Solution

Verified by Experts
The correct answer is:
A

DNA ligase is the enzyme that joins two DNA fragments by forming phosphodiester bonds between them, especially during recombinant DNA formation.

Restriction endonuclease → cuts DNA

DNA polymerase → synthesizes DNA

Gyrase → relieves DNA supercoiling

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