Question

Which of the following is a cause of a DNA mutation?

O
A. The linking of amino acid subunits into a long chain
O
B. The transcription of DNA into RNA
O
C. An error in the repair of damaged DNA
D. The diffusion of molecules across the cell membrane
SUBMIT

Answer 1

That would be C. Error in the repair of damaged DNA.

a wrong nucleotide can be placed while repairing DNA which is considered a mutation.

Answer 2

(C). An error in the repair of damaged DNA.

Step-by-step explanation:

DNA mutation can be defined as permanent changes in genetic material due to alteration in nucleotide sequence. Mutations can occur randomly during replication or can be induced by exposure to mutagens (mutation causing agents).

During DNA replication, various errors take place due to incorporation of incorrect nucleotide base in growing DNA strand and form damaged DNA. These errors are generally repaired by DNA-repair systems of cell.

However, if the damaged DNA is not repaired due to errors in DNA-repair system due to problems, the DNA would become mutated.

Thus, the correct answer is option (C).