Question

Normally, DNA polymerase III proofreads as it synthesizes a new strand. If it misses an error and adds an incorrect base to a new strand, what is the consequence?

		This is a mutation and would be repaired by ligase because cells cannot have mutations that are uncorrected.
		This is a mutation and would result in the death of the cell that contains it.
		This is a mutation and would be inherited by cells that receive copies made from the altered DNA strand.
		This is a temporary mistake that will be repaired when DNA polymerase I scans the strand for errors.

Answer 1

Usually, DNA polymerase removes the incorrect base via proofreading if it misses to remove an incorrect base, it will be repaired via mismatch repair, if the mismatch repair fails to remove the mismatched base it will be inherited to the daughter cells.

a single basepair mutation will not cause cell death.

so the answer is This is a mutation and would be inherited by cells that receive copies made from the altered DNA strand.