Although DNA is the main hereditary material in all life-forms,it lacks one important characteristic of being a candidate for the first life-form.Why have researchers rejected the idea that DNA was found in the first life-form?
A)It does not function as a catalyst.
B)It is not stable enough to have withstood early Earth's harsh atmosphere.
C)Because it has only four different bases,it does not carry enough information;therefore,it cannot adapt and evolve.
D)The type of sugar found in DNA is much too complicated to have been present early in Earth's history.

Question

Quizplus · Accepted Answer

DNA does not function as a catalyst, which is a crucial characteristic for the first life-form to facilitate chemical reactions necessary for life processes. RNA, on the other hand, can act as a catalyst and is considered a more likely candidate for the first life-form.

Although DNA Is the Main Hereditary Material in All Life-Forms,it