Multiple Choice
In contrast to RNA, DNA contains which nitrogenous base instead of uracil?
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7. DNA and Chromosome Structure
DNA Structure
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A DNA nucleotide may be made up of a phosphate group along with which of the following components?
A
a deoxyribose sugar and a carboxyl group
B
a ribose sugar and a fatty acid
C
a ribose sugar and a nitrogenous base
D
a deoxyribose sugar and a nitrogenous base
Verified step by step guidance1
Recall the basic structure of a DNA nucleotide, which consists of three main components: a phosphate group, a sugar, and a nitrogenous base.
Identify the type of sugar present in DNA nucleotides. DNA contains deoxyribose sugar, which differs from ribose sugar found in RNA.
Understand that the nitrogenous base is one of the four bases in DNA: adenine, thymine, cytosine, or guanine.
Eliminate options that mention ribose sugar or unrelated groups like carboxyl groups or fatty acids, as these are not part of DNA nucleotides.
Conclude that the correct components paired with the phosphate group in a DNA nucleotide are a deoxyribose sugar and a nitrogenous base.
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