Question

The role of restriction endonucleases is ______.

विकल्प

• to cut DNA fragment at specific sites

• to join DNA fragments

• to introduce DNA into plasmid

• none of the above

Answer 1

The role of restriction endonucleases is to cut DNA fragment at specific sites.

Explanation:

Restriction endonucleases recognise specific DNA sequences and cut at those sites. DNA ligase joins fragments; restriction enzymes do not introduce DNA into plasmids.