Multiple Choice
Which of the following describes a DNA-binding motif?
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14. DNA Synthesis
Discovering the Structure of DNA
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Which of the following is a component of a DNA molecule?
A
Uracil
B
Ribose sugar
C
Phosphate group
D
Deoxyribose sugar
Verified step by step guidance1
Understand the structure of a DNA molecule. DNA is composed of nucleotides, each consisting of a phosphate group, a deoxyribose sugar, and a nitrogenous base.
Identify the components of a nucleotide in DNA. The sugar in DNA is deoxyribose, not ribose, which is found in RNA.
Recognize the nitrogenous bases in DNA. DNA contains adenine, thymine, cytosine, and guanine. Uracil is found in RNA, not DNA.
Consider the role of the phosphate group. The phosphate group is a key component of the DNA backbone, linking the deoxyribose sugars together.
Conclude that the correct component of a DNA molecule from the options given is the deoxyribose sugar, as it is specific to DNA and not found in RNA.
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