Multiple Choice
Which nitrogenous base is found only in RNA (and not in DNA)?
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7. DNA and Chromosome Structure
RNA
Multiple Choice
Which monomers make up RNA?
A
Deoxyribonucleotides (A, T, C, and G)
B
Amino acids
C
Monosaccharides
D
Ribonucleotides (A, U, C, and G)
Verified step by step guidance1
Understand that RNA is a nucleic acid composed of monomers called nucleotides.
Recall that nucleotides consist of three parts: a sugar, a phosphate group, and a nitrogenous base.
Identify that in RNA, the sugar is ribose, which distinguishes ribonucleotides from deoxyribonucleotides (which have deoxyribose).
Recognize the four nitrogenous bases in RNA: adenine (A), uracil (U), cytosine (C), and guanine (G). Note that uracil replaces thymine found in DNA.
Conclude that the monomers making up RNA are ribonucleotides containing the bases A, U, C, and G.
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