Scelta multipla
DNA and RNA are both types of what?
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7. DNA and Chromosome Structure
DNA Structure
Scelta multipla
In the structure of DNA, which pentose sugar is present in the backbone?
A
2-deoxyribose
B
Ribose
C
Glucose
D
Fructose
Guida verificata passo dopo passo1
Recall that DNA stands for deoxyribonucleic acid, which hints at the type of sugar present in its structure.
Understand that the backbone of DNA is composed of alternating sugar and phosphate groups.
Identify that the sugar in DNA is a pentose sugar, meaning it has five carbon atoms.
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.
Conclude that the sugar present in the DNA backbone is 2-deoxyribose, which distinguishes DNA from RNA, where ribose is present.
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