Multiple Choice
In the context of DNA structure, which of the following components is NOT found in DNA?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the structure of DNA, what is the name of the five-carbon sugar found in each nucleotide?
A
Ribose
B
Fructose
C
Glucose
D
2-deoxyribose
Verified step by step guidance1
Recall that DNA (deoxyribonucleic acid) is composed of nucleotides, each containing three components: a phosphate group, a nitrogenous base, and a five-carbon sugar.
Understand that the sugar in DNA nucleotides is different from the sugar in RNA nucleotides; DNA contains a sugar that lacks one oxygen atom compared to RNA.
Identify that the sugar in DNA is called 2-deoxyribose, which means it is a ribose sugar missing an oxygen atom at the 2' carbon position.
Note that ribose is the sugar found in RNA nucleotides, while glucose and fructose are sugars involved in energy metabolism, not nucleic acid structure.
Therefore, the five-carbon sugar in DNA nucleotides is named 2-deoxyribose.
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