The Chemistry Of Biology Practice Test

Name the four nitrogenous bases for RNA.

Adenine, Cytosine, Guanine, Uracil Adenine, Cytosine, Guanine, Thymine Adenine, Uracil, Guanine, Thymine Cytosine, Guanine, Uracil, Thymine

Correct Answer:

Adenine, Cytosine, Guanine, Uracil

Explanation:

RNA is built from four nitrogenous bases: adenine, cytosine, guanine, and uracil. Thymine is used in DNA, not RNA, so uracil takes thymine’s place in RNA. The set adenine, cytosine, guanine, and uracil matches RNA’s actual base composition, while options that include thymine or omit uracil do not fit.

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