OBJECTIVE LIFE SCIENCE
MOLECULAR BIOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Ribose
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Deoxyribose
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Glucose
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None of the above
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Detailed explanation-1: -Deoxyribose is the pentose sugar in DNA, while ribose is the pentose sugar in RNA. The presence of a hydroxyl group on the second carbon of ribose and hydrogen on the second carbon of deoxyribose distinguishes the sugars. Deoxyribose is a five-carbon sugar found in DNA. It is the nucleotide’s central molecule.
Detailed explanation-2: --d-Ribose is a 5-carbon sugar with a hydroxyl group (-OH) on each carbon. Carbons 1 and 4 are joined into a five-member ring through the C4 hydroxyl oxygen. This ribose sugar is found in all RNA molecules.
Detailed explanation-3: -Ribose is a single-ring pentose [5-Carbon] sugar. The numbering of the carbon atoms runs clockwise, following organic chemistry rules. Note the absence of the hydroxyl (-OH) group on the 2’ carbon in the deoxy-ribose sugar in DNA as compared with the ribose sugar in RNA.
Detailed explanation-4: -The five-carbon sugar in DNA is called deoxyribose, while in RNA, the sugar is ribose.