Question

Which of the following causes mutations by creating thymine dimers? ______

A) ultraviolet light
B) nitrous acid
C) benzopyrene
D) nucleotide analogs
E) gamma rays

Answer 1

UV light exposure can cause thymine dimers, resulting in DNA polymerase stalling and possible formation of frameshift or point mutations. Thymine dimers occur when adjacent thymine bases in a DNA strand become covalently linked. These dimers can be repaired through nucleotide excision repair.

Step-by-step explanation:

UV light exposure can cause thymine dimers, resulting in DNA polymerase stalling and possible formation of frameshift or point mutations. Thymine dimers occur when adjacent thymine bases in a DNA strand become covalently linked. These dimers can be repaired through nucleotide excision repair.