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What is the structural difference between the sugar found in RNA and the sugar found in...

What is the structural difference between the sugar found in RNA and the sugar found in DNA?

A. The presence of a 3’ hydroxyl

B. The presence of a 2’ hydroxyl

C. The presence of a 5’ hydroxyl

D. The presence of a ring oxygen

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Answer #1

ANS: B. The presence of a 2’ hydroxyl.

Explanation:

Both DNA and RNA nucleotides are made up with a Nitrogenous base, 5-carbon sugar and phosphate group.

The sugar molecule in ribonucleotides is Beta- D- Ribofuranose (Ribo furanose), where as in de oxy ribonucleotides it is 2-De oxy Beta- D- Ribofuranose.

RNA contains oxygen molecule on second position of its Ribose sugar. In DNA it is absent; due to this nature DNA is more chemically stable when comparing with RNA.

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