Multiple Choice
In double-stranded DNA, adenine (A) always pairs with which base according to Watson-Crick base pairing rules?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, what is the name of the sugar found in the DNA backbone?
A
Glucose
B
Deoxyribose
C
Fructose
D
Ribose
Verified step by step guidance1
Recall that the backbone of DNA is composed of alternating sugar and phosphate groups.
Identify the sugar component in DNA, which is a five-carbon sugar (a pentose sugar).
Understand that DNA contains a sugar called deoxyribose, which differs from ribose by lacking one oxygen atom on the 2' carbon.
Recognize that glucose and fructose are six-carbon sugars (hexoses) and are not part of the DNA backbone.
Conclude that the sugar found in the DNA backbone is deoxyribose.
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