Which Occurs in a Pyrimidine, but Not in a Purine

question 136

Multiple Choice

Which occurs in a pyrimidine, but not in a purine?

• A) Two nitrogens in a six-sided ring
• B) A double-bonded pair of carbon atoms in a six-sided ring
• C) Two carbonyl groups as part of a six-sided ring
• D) An amino group bonded to a six-sided ring
• E) A five-sided ring fused to a six-sided ring

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Definitions:

Gerontologists

Scientists or practitioners who specialize in the study of aging and the health, well-being, and social issues affecting older adults.

Long Life

Living for an extended period, often beyond the average lifespan for a species or demographic group.

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The average period that a person may expect to live.

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A measure of the frequency of occurrence of death in a defined population during a specified interval.