Multiple Choice
In the context of DNA structure, what are the monomers (basic repeating subunits) that make up a DNA molecule?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the context of DNA structure, what are the monomers that make up a DNA polymer?
A
Fatty acids and glycerol
B
Amino acids
C
Monosaccharides (simple sugars such as glucose)
D
Deoxyribonucleotides (nucleotides consisting of a deoxyribose sugar, phosphate group, and nitrogenous base)
Verified step by step guidance1
Understand that DNA is a polymer, which means it is made up of repeating smaller units called monomers.
Recall the structure of DNA: it consists of a sugar-phosphate backbone and nitrogenous bases attached to the sugar.
Identify the monomer unit of DNA as a nucleotide, which is composed of three parts: a deoxyribose sugar, a phosphate group, and a nitrogenous base.
Recognize that these nucleotides are specifically called deoxyribonucleotides because the sugar in DNA is deoxyribose (lacking one oxygen atom compared to ribose in RNA).
Conclude that the monomers making up a DNA polymer are deoxyribonucleotides, not fatty acids, amino acids, or simple sugars.
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