Multiple Choice
In DNA structure, what is the name of the sugar found in the DNA backbone?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In DNA structure, a nucleotide of DNA may contain which of the following components?
A
Ribose sugar, a phosphate group, and uracil
B
Deoxyribose sugar and a nitrogenous base only (no phosphate group)
C
Deoxyribose sugar, a phosphate group, and a nitrogenous base (A, T, G, or C)
D
Amino acid, ribose sugar, and a phosphate group
Verified step by step guidance1
Recall the basic structure of a DNA nucleotide, which consists of three main components: a sugar, a phosphate group, 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.
Recognize the nitrogenous bases specific to DNA: adenine (A), thymine (T), guanine (G), and cytosine (C). Note that uracil (U) is found only in RNA, not DNA.
Understand that each nucleotide in DNA also contains a phosphate group, which links the sugar of one nucleotide to the sugar of the next nucleotide, forming the backbone of the DNA strand.
Combine these facts to conclude that a DNA nucleotide contains deoxyribose sugar, a phosphate group, and one of the nitrogenous bases A, T, G, or C.
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