Multiple Choice
Which nitrogenous bases are present in RNA?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
Which 5-carbon sugar is characteristic of RNA?
A
Ribose
B
Fructose
C
Glucose
D
Deoxyribose
Verified step by step guidance1
Understand that nucleic acids (DNA and RNA) are composed of nucleotides, each containing a sugar, a phosphate group, and a nitrogenous base.
Recall that the sugar component in nucleotides is a 5-carbon sugar, also known as a pentose sugar.
Identify the two main types of pentose sugars found in nucleic acids: ribose and deoxyribose.
Recognize that ribose has a hydroxyl group (-OH) attached to the 2' carbon, which is characteristic of RNA, while deoxyribose lacks this hydroxyl group at the 2' carbon, characteristic of DNA.
Conclude that the 5-carbon sugar characteristic of RNA is ribose, distinguishing it from deoxyribose found in DNA and other sugars like fructose and glucose, which are not components of nucleic acids.
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