Multiple Choice
RNA differs from DNA in that:
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7. DNA and Chromosome Structure
RNA
Multiple Choice
In RNA, what is the name of the five-carbon sugar found in the nucleotide backbone?
A
Glucose
B
Deoxyribose
C
Fructose
D
Ribose
Verified step by step guidance1
Understand that nucleotides, the building blocks of nucleic acids like RNA and DNA, consist of three components: a nitrogenous base, a phosphate group, and a five-carbon sugar.
Recall that the sugar component differs between DNA and RNA. DNA contains deoxyribose, which lacks one oxygen atom compared to the sugar in RNA.
Identify that the sugar in RNA is a five-carbon sugar called ribose, which has a hydroxyl group (-OH) attached to the 2' carbon, distinguishing it from deoxyribose.
Recognize that glucose and fructose are also sugars but are six-carbon sugars (hexoses) and are not part of the nucleotide backbone in nucleic acids.
Conclude that the correct five-carbon sugar in the RNA nucleotide backbone is ribose.
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