Question

This is the normal nucleotide sequence on a DNA strand:
A—C—T—G—G—A—T
What is a substitution?

Select one:
a.
A—C—T—G—C—G—A—T

b. A—C—T—G—A—T
c. A—G—T—G—G—A—T
d. A—C—U—G—G—A—U

Answer 1

Well it is not A because A is INSERTION B is DELETION IT WOULD BE EITHER  C or D

Answer 2

The correct answer is:        A - G - T - G - G - A - T