10
lesson pretestMultiple Choice

Pretest

Question 10 • CMS 2026-2027 Biology CREDIT RECOVERY

Which statement best describes the components of nucleic acids?

Answer
A
They are made up of nitrogenous bases, sugars, and phosphates.
B
They are made up of carbon, hydrogen, and oxygen only.
C
They are made up of chains of amino acids.
D
They are made up almost entirely of carbon and hydrogen.

Explanation

Nucleic acids such as DNA and RNA are built from nucleotides. Each nucleotide contains a nitrogenous base, a sugar, and a phosphate group, so the best description is that they are made up of nitrogenous bases, sugars, and phosphates. Chains of amino acids make up proteins, not nucleic acids.

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