Adenosine triphosphate is built from a core molecule of adenosine monophosphate. Which three parts make up that core molecule?
AGuanine, ribose and three phosphate groups
BGuanine, glucose and one phosphate group
CAdenine, ribose and one phosphate group
DAdenine, glucose and two phosphate groups
Answer & Solution
Correct answer: C. Adenine, ribose and one phosphate group
1. Adenosine monophosphate sits at the heart of adenosine triphosphate.
2. It is an adenine molecule bonded to a ribose molecule and to a single phosphate group.
3. Adding a second phosphate gives adenosine diphosphate and adding a third gives adenosine triphosphate.
4. Ribose is a five-carbon sugar found in ribonucleic acid, so glucose has no place in the core.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.1 Energy in Living Systems_
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