Multiple Choice
In the DNA double helix, which type of bond holds the two strands together through complementary base pairing?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the structure of DNA, which sugar is found in the backbone of the molecule?
A
Ribose
B
Glucose
C
2-deoxyribose
D
Fructose
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 differs from the sugar found in RNA.
Identify that the sugar in DNA lacks one oxygen atom compared to the sugar in RNA, making it a 'deoxy' sugar.
Recognize that the specific sugar in DNA is called 2-deoxyribose, which means it is ribose missing an oxygen atom at the 2' carbon.
Conclude that among the options given, 2-deoxyribose is the correct sugar found in the DNA backbone.
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