Question

Assertion (A) All endonucleases cut DNA at specific sites.
Reason (R) Endonucleases were discovered from viruses.

• A. If both A and R are true and R is the correct explanation of A
• B. If both A and R are true, but R is not the correct explanation of A
• C. If A is true, but R is false
• D. If A is false, but R is true

Answer 1

Answer: (C)

Assertion is true, but Reason is false. Reason can be corrected as
Restriction endonucleases were discovered from bacteria, not from viruses.
All endonucleases cut DNA at specific sites within the DNA sequence.