Multiple Choice
In the structure of DNA, what is the name of the five-carbon sugar found in each nucleotide?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, which set correctly describes the three components of a DNA nucleotide?
A
A phosphate group, a deoxyribose sugar, and a nitrogenous base
B
A deoxyribose sugar and two nitrogenous bases
C
A phosphate group, a ribose sugar, and a nitrogenous base
D
A phosphate group, a deoxyribose sugar, and an amino acid
Verified step by step guidance1
Recall that a nucleotide, the basic building block of DNA, consists of three main components: a sugar, a phosphate group, and a nitrogenous base.
Identify the sugar specific to DNA nucleotides, which is deoxyribose, distinguishing DNA from RNA (which contains ribose).
Recognize that the phosphate group is attached to the 5' carbon of the sugar, forming the backbone of the DNA strand.
Understand that the nitrogenous base (adenine, thymine, cytosine, or guanine) is attached to the 1' carbon of the deoxyribose sugar.
Combine these components to confirm that the correct set describing a DNA nucleotide is: a phosphate group, a deoxyribose sugar, and a nitrogenous base.
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