Question

Which enzyme is involved in the base excision repair of DNA?

• A. Purine glycosylase
• B. P1 nuclease
• C. Endonuclease II
• D. DNA glycosylase

Hint:

DNA glycosylase removes damaged bases, initiating the base excision repair process.

Answer 1

The Correct Option is D

Step 1: Understanding Base Excision Repair 
Base excision repair is a DNA repair mechanism that removes damaged bases and replaces them with the correct ones. 
Step 2: Role of DNA Glycosylase 
- DNA glycosylase: The enzyme responsible for removing damaged bases in base excision repair. 
- Other enzymes like Purine glycosylase, P1 nuclease, and Endonuclease II are involved in different repair mechanisms. 
Step 3: Conclusion 
DNA glycosylase is the enzyme responsible for initiating base excision repair.