Multiple Choice
In DNA structure, DNA is composed of repeating subunits called what?
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7. DNA and Chromosome Structure
DNA Structure
Multiple Choice
In the context of DNA structure, what is the monomer (basic repeating unit) of DNA?
A
A monosaccharide (simple sugar)
B
A triglyceride
C
An amino acid
D
A nucleotide (deoxyribonucleotide)
Verified step by step guidance1
Understand that DNA is a polymer, meaning it is made up of many repeating units called monomers.
Recall that the monomers of DNA are called nucleotides, which are also known as deoxyribonucleotides.
Recognize that each nucleotide consists of three components: a phosphate group, a deoxyribose sugar (a monosaccharide), and a nitrogenous base.
Differentiate nucleotides from other biological molecules such as monosaccharides alone, triglycerides, or amino acids, which are monomers of carbohydrates, lipids, and proteins respectively.
Conclude that the correct monomer of DNA is the nucleotide (deoxyribonucleotide), as it is the basic repeating unit that forms the DNA polymer.
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