Question

Which one of the following is a restriction enzyme?

• A. RNA polymerase
• B. DNA polymerase
• C. Ligase
• D. EcoR I

Hint:

Restriction enzymes are also called restriction endonucleases.

Answer 1

The Correct Option is D

Step 1: Understanding restriction enzymes.
Restriction enzymes are molecular scissors that cut DNA at specific recognition sequences.
Step 2: Identifying the correct option.
EcoR I is a well-known restriction endonuclease isolated from {Escherichia coli}.
Step 3: Conclusion.
Hence, the correct answer is (D) EcoR I.