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Section 4: Nucleic Acids

Nucleic Acids

1.

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If a molecule contains a 5-carbon sugar, the nitrogen base uracil, and can be used in protein synthesis, then the molecule is __________.
A)DNA
B)RNA
C)thymine
D)cytosine
2.
Nucleic acids are made of nucleotides. There are three components to a nucleotide. Which of the following correctly identifies those three parts?
A)nitrogen base, phosphate, and a five-carbon sugar
B)hydroxyl base, phosphate, and a five-carbon sugar
C)nitrogen base, phosphate, and a six-carbon sugar
D)nitrogen base, a protein, and a five-carbon sugar
3.
DNA is a molecule made of two long chains of nucleotides that are arranged in a distinctive, three-dimensional physical structure. What is this three-dimensional structure?
A)a spherical macromolecule
B)a double helix
C)a single helix
D)a pleated sheet
4.
What is the principle function of DNA?
A)stores genetic information
B)causes molecules to transfer from one place in the body to another
C)sends messages to different parts of the body
D)stores energy for later use
5.
What sugar is used to make DNA?
A)ribose
B)ribulose
C)dextrose
D)deoxyribose
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