Multiple Choice
DNA is classified as which type of biological macromolecule?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
Which sugar is found in the backbone of DNA?
A
Deoxyribose
B
Glucose
C
Fructose
D
Ribose
Verified step by step guidance1
Understand that DNA (Deoxyribonucleic acid) is a polymer made up of nucleotides, and each nucleotide consists of three components: a phosphate group, a nitrogenous base, and a sugar molecule.
Recall that the sugar in the backbone of DNA is a five-carbon sugar, which is crucial for forming the structure of the DNA strand.
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 glucose and fructose are six-carbon sugars (hexoses) and are not components of nucleic acid backbones.
Conclude that the sugar forming the backbone of DNA is deoxyribose, which links with phosphate groups to create the sugar-phosphate backbone of the DNA double helix.
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