Multiple Choice
In the context of DNA structure, what are the monomers that make up a DNA polymer?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the context of DNA structure, what is the five-carbon (pentose) sugar found in DNA nucleotides?
A
Glucose
B
2-deoxyribose
C
Ribose
D
Fructose
Verified step by step guidance1
Understand that DNA nucleotides are composed of three parts: a phosphate group, a nitrogenous base, and a five-carbon sugar (pentose).
Recall that the sugar in DNA is different from the sugar in RNA; DNA contains a sugar that lacks one oxygen atom compared to RNA's sugar.
Identify that the sugar in RNA nucleotides is ribose, which has a hydroxyl group (-OH) attached to the 2' carbon.
Recognize that the sugar in DNA nucleotides is 2-deoxyribose, which is similar to ribose but missing the oxygen atom on the 2' carbon (hence 'deoxy').
Conclude that among the options given, 2-deoxyribose is the correct five-carbon sugar found in DNA nucleotides.
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