Multiple Choice
In the context of DNA structure, which nucleotide base is not found in DNA?
7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
Which sugar is found in the backbone of DNA?
A
Glucose
B
2-deoxyribose
C
Ribose
D
Fructose
Verified step by step guidance1
Understand that DNA (deoxyribonucleic acid) is composed of nucleotides, each containing a sugar, a phosphate group, and a nitrogenous base.
Recall that the sugar in the backbone of DNA is a five-carbon sugar, which distinguishes DNA from RNA.
Identify that the sugar in DNA lacks one oxygen atom compared to the sugar in RNA, which is why it is called 'deoxy'.
Recognize that the sugar in DNA is 2-deoxyribose, meaning it is ribose missing an oxygen atom at the 2' carbon position.
Conclude that among the options given (Glucose, 2-deoxyribose, Ribose, Fructose), the correct sugar in the DNA backbone is 2-deoxyribose.
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