Multiple Choice
In the context of DNA structure, what is the monomer (basic repeating unit) of DNA?
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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
Fructose
C
Ribose
D
Glucose
Verified step by step guidance1
Understand that DNA (deoxyribonucleic acid) is composed of a sugar-phosphate backbone and nitrogenous bases.
Recall that the sugar in the backbone of DNA is a five-carbon sugar, which is a key structural component.
Differentiate between ribose and deoxyribose: ribose has a hydroxyl group (-OH) on the 2' carbon, while deoxyribose lacks this hydroxyl group at the 2' carbon, having only a hydrogen atom instead.
Recognize that the sugar in RNA is ribose, whereas in DNA it is deoxyribose, which is why DNA is called deoxyribonucleic acid.
Conclude that among the options given (Fructose, Ribose, Glucose, Deoxyribose), the sugar found in the backbone of DNA is deoxyribose.
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