About 10% because I know about 90-95% of DNA is junk DNA(doesnt perform serious function)
Think about skin cells. Skin cells shed every day, if cell division didn't take place, you would just constantly be losing skin cells.
Complementary strand of mRNA would be: AAUCGGAAC
In short, Your Answer would be Option C
Hope this helps!
D. It's harder body parts. A lot of fossils are of the skull, therefore that would lead one to think that it would be harder<span />
