Question 1:

Which type of DNA repair mechanism fixes errors in DNA replication?

Explanation: A) Mismatch repair is the DNA repair mechanism that fixes errors in DNA replication. It corrects base-pair mismatches and small insertions or deletions that may occur during replication.

Question 2:

Which DNA repair mechanism repairs DNA damage caused by UV radiation?

Explanation: A) Nucleotide excision repair is the DNA repair mechanism that repairs DNA damage caused by UV radiation. It removes and replaces damaged nucleotides in a section of DNA.

Question 3:

Which DNA repair mechanism repairs DNA damage caused by chemical modifications?

Explanation: A) Base excision repair is the DNA repair mechanism that repairs DNA damage caused by chemical modifications. It removes damaged bases and replaces them with the correct bases.

Question 4:

Which DNA repair mechanism repairs double-strand breaks in DNA?

Explanation: D) Non-homologous end joining is the DNA repair mechanism that repairs double-strand breaks in DNA. It directly joins the broken ends of DNA strands, without the need for a template.

Question 5:

Which DNA repair mechanism uses a homologous DNA sequence as a template for repair?

Explanation: A) Homologous recombination is the DNA repair mechanism that uses a homologous DNA sequence as a template for repair. It can repair double-strand breaks and ensure accurate repair using the intact homologous sequence.