Multiple Choice
Which nitrogenous base is found in RNA but not in DNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In RNA, the pentose sugar in the nucleotide backbone is called what?
A
Deoxyribose
B
Glucose
C
Fructose
D
Ribose
Verified step by step guidance1
Understand that nucleotides in nucleic acids consist of three components: a nitrogenous base, a phosphate group, and a pentose sugar.
Recall that the pentose sugar differs between DNA and RNA; DNA contains deoxyribose, while RNA contains ribose.
Recognize that ribose is a five-carbon sugar with a hydroxyl group (-OH) attached to the 2' carbon, distinguishing it from deoxyribose, which lacks this hydroxyl group at the 2' position.
Identify that glucose and fructose are six-carbon sugars (hexoses) and are not components of the nucleotide backbone in nucleic acids.
Conclude that the pentose sugar in the nucleotide backbone of RNA is ribose.
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