Multiple Choice
In the DNA double helix, what interaction primarily holds the two antiparallel strands together?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, what is the name of the pentose sugar found in the DNA backbone?
A
2-deoxyribose
B
Glucose
C
Ribose
D
Fructose
Verified step by step guidance1
Recall that DNA (deoxyribonucleic acid) is composed of a sugar-phosphate backbone and nitrogenous bases.
Identify that the sugar in the backbone of DNA is a pentose sugar, meaning it has five carbon atoms.
Understand that the sugar in DNA differs from the sugar in RNA by the absence of one oxygen atom on the 2' carbon.
Recognize that the sugar in DNA is called 2-deoxyribose, which means it is ribose lacking an oxygen atom at the 2' position.
Confirm that the other options (glucose, ribose, fructose) are sugars but not the specific pentose sugar found in DNA.
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