QUESTION 9 Which of the following statements regarding the benefit of making the

Question

QUESTION 9 Which of the following statements regarding the benefit of making the switch from an RNA- to a DNA-based genetic system during the evolution of life is correct? a. The double stranded structure of DNA has a much greater potential for interaction with outside molecules. b. Replication of RNA is too fast to be favored by natural selection. c.DNA is a more stable molecule because deoxyribose is less reactive than is ribose. d.DNA replication systems do not have the proofreading capabilities that are usually present in RNA replication.

Explanation / Answer

Answer:

c. DNA is a more stable molecule because deoxyribose is less reactive than is ribose.

Explanation:

While DNA contains deoxyribose, RNA contains ribose (in deoxyribose there is no hydroxyl group attached to the pentose ring in the 2' position). These hydroxyl groups make RNA less stable than DNA because it is moreprone to hydrolysis.

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