Choose the correct pair from the following:

Biology Biotechnology Principles and Processes Previous Year Questions Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 11, 2026

Exonucleases : Make cuts at specific positions within DNA

Ligases : Join the two DNA molecules

Polymerases : Break the DNA into fragments

Nucleases : Separate the two strands of DNA

Text Solution

Verified by Experts

The correct answer is:

DNA ligase joins DNA fragments by forming phosphodiester bonds. Other options are incorrect because:

• Exonucleases remove nucleotides from ends

• Polymerases synthesize DNA, not break it

• Nucleases cut DNA, not separate strands specifically

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