In nearly every living thing on earth, where does the energy to regenerate adenosine triphosphate from adenosine diphosphate come from?
AFrom the breakdown of nucleic acids
BFrom the diffusion of dissolved salts
CFrom the metabolism of glucose
DFrom the absorption of infrared rays
Answer & Solution
Correct answer: C. From the metabolism of glucose
1. Adenosine triphosphate behaves like a rechargeable battery that must be recharged after use.
2. Energy must be put back into the system to reattach the third phosphate group.
3. In nearly every living thing on earth that energy comes from the metabolism of glucose.
4. Glucose catabolism is therefore the direct link between exergonic breakdown and endergonic cell work.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 7 "Cellular Respiration", section 7.1 Energy in Living Systems_
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