Which structural component is found in DNA but not in RNA?
A.ribose
B.deoxyribose
C.phosphate group
D.nitrogenous base
Answer:
The correct option is B. Deoxyribose.
DNA is made up of small units called as dNTP ( deoxyribonucleoside triphosphate). In the dNTP, deoxyribose sugar, nitogenous base, and phosphate group is present. Deoxyribose is a pentose sugar, which contains Hydrogen group at 2′ carbon of its pentose ring ( therefore called deoxyribose).
Whereas in RNA, OH ( hydroxyl group) is present at 2′ carbon of the pentose ring. Therefore, it is not called deoxyribose.
Thus, deoxyribose is the structural component found in DNA but not in RNA.
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