Over Time, DNA Replaced RNA as the Primary Carrier of Genetic

question 17

Multiple Choice

Over time, DNA replaced RNA as the primary carrier of genetic information, and the chemical stability of DNA is believed to be the key reason for this. Which attribute of DNA is the reason behind its chemical stability?

• A) DNA lacks a free hydroxyl group on the 2'-carbon atom of its sugar.
• B) Unlike RNA, DNA is usually double stranded.
• C) DNA does not usually form hairpin loops.
• D) One of the two pyrimidines found in DNA does not involve uracil.
• E) DNA contains thymines, which make it more chemically stable.

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