Question

6) When DNA is copied, sometimes a new, incorrect, base pairing appears within the structure of a new DNA molecule replacing original base pairs. This mistake is called a base-pair

A) deletion.
B) insertion.
C) institution.
D) substitution.

Answer 1

It's D. Substitution

Answer 2

D) substitution.

Step-by-step explanation:

Substitution mutations are those in which one base pair is replaced by another base pair; they are called transition when substitution occurs between bases of the same class, purine to purine (A - G) and pyrimidine to pyrimidine (T - C); and transverse, when the substitution is between bases of different class, purine for pyrimidine and pyrimidine for purine.