Multiple Choice
Which set correctly lists the nitrogenous bases found in DNA?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, what sugar is found in the backbone of DNA nucleotides?
A
Fructose
B
Ribose
C
Glucose
D
Deoxyribose
Verified step by step guidance1
Recall that DNA (deoxyribonucleic acid) is composed of nucleotides, each consisting of three parts: a phosphate group, a nitrogenous base, and a sugar molecule.
Understand that the sugar in the backbone of DNA nucleotides is a five-carbon sugar, which is crucial for forming the sugar-phosphate backbone.
Differentiate between the sugars found in nucleic acids: ribose is found in RNA, while deoxyribose is found in DNA. The key difference is that deoxyribose lacks one oxygen atom compared to ribose.
Recognize that fructose and glucose are sugars but are not components of nucleic acid backbones; they are primarily involved in energy metabolism.
Conclude that the sugar found in the backbone of DNA nucleotides is deoxyribose, which gives DNA its name and structural properties.
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