Question

Which of the following is a correct statement about the currently accepted "RNA world hypothesis" which possibly helps to explain the evolution sequence of DNA, RNA, and proteins?

A) RNA arose from DNA
B) DNA arose from RNA
C) proteins were the first catalysts
D) DNA was the first catalyst
E) The current protein translation system under which genomic DNA is transcribed into RNA and RNA is then translated into proteins which function as catalysts in enzymatic reactions has always existed. No previous variable transcription/translation system existed.

Answer 1

DNA arose from RNA.

Step-by-step explanation:

RNA world hypothesis explains that the RNA was the first genetic material on the earth. This hypothesis was first explained by the Carl Woese. RNA can acts as genetic material in this hypothesis.

The DNA arose from the RNA in the RNA world hypothesis. The ability of RNA to work as an enzyme and its 2' hydroxyl group makes the RNA fit for the genetic material.

Thus, the correct answer is option (B).