Multiple Choice
In the DNA double helix, which type of bond holds the two strands together through complementary base pairing?
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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