DNA is the main hereditary material of all life. However, DNA lacks one important characteristic for the first forms of life. 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) DNA only has four types of bases. Therefore, DNA cannot adapt and evolve.
D) The type of sugar found in DNA is too complicated to have been present early in Earth's history.

Question

Quizplus · Accepted Answer

DNA does not have catalytic properties, which are necessary for the biochemical reactions required for life. RNA, which can act as both genetic material and a catalyst, is thought to have been the first hereditary material.

DNA Is the Main Hereditary Material of All Life