Question

The enzyme that cuts DNA at a specific location is:

• A. Endonuclease
• B. Exonuclease
• C. Polymerase
• D. All of these

Hint:

'Endo' means 'within' — think of an internal, sequence-specific cut.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Enzymes that act on nucleic acids can cut DNA either from the ends (exonucleases) or at specific internal recognition sites (endonucleases). Restriction endonucleases specifically recognise short palindromic sequences and cut the DNA there.

Step 2: Matching to the question:
Since the question asks for the enzyme that cuts DNA at a 'specific location', this describes a restriction endonuclease, which recognises and cuts only at its specific recognition sequence, not at random points or only at the ends.

Final Answer:
The enzyme is Endonuclease.
Option (A) is correct.