Question

A point mutation could be caused by

A. depurination.

B. deamination.

C. tautomeric shift.

D. any of the above.

Answer 1

A point mutation is a type of mutation that causes the replacement of a single base nucleotide with another nucleotide. It can be caused by depurination, deamination, or tautomeric shift.

Step-by-step explanation:

A point mutation is a type of mutation that causes the replacement of a single base nucleotide with another nucleotide. It can be caused by depurination, deamination, or tautomeric shift. Depurination refers to the loss of a purine base, deamination is the spontaneous deamination of 5-methylcytosine, and tautomeric shift results in a purine becoming a pyrimidine, or vice versa.