Question

Which of the following is a restriction endonuclease?

• A. DNase $\mathrm{I}$
• B. RNase I
• C. Hind $\mathrm{II}$
• D. Protease

Answer 1

The correct option is C

Hind $\mathrm{II}$

The correct option is C.

The explanation for the correct option:

1. Restriction endonuclease is used to cleave DNA at a specific site.
2. Hind $\mathrm{II}$ is a restriction endonuclease.
3. It is used to cut DNA molecules at a specific point by recognizing a particular sequence of $6$ base pairs.

The explanation for the incorrect options:

Option A

DNase $\mathrm{I}$ is a particular endonuclease used to assist chromatic breakdown during apoptosis.

Option B

RNase $\mathrm{I}$ is used to break down RNA into smaller parts.

Option D

Protease enzyme is used to break down protein. These enzymes are made by plants, fungi, bacteria, and animals.

Final answer: Hind $\mathrm{II}$ is a restriction endonuclease.