Apentix/AP Biology/Unit 3: Cellular Energetics/Question
AP Biologyeasymcq1 pt

Which statement best distinguishes the jobs of ATP and NADH inside a cell?

A.Both molecules store genetic information that ribosomes translate into metabolic enzymes
B.NADH donates phosphate groups to membranes while ATP shuttles electrons directly to oxygen
C.ATP transfers phosphate groups to power cellular work directly, while NADH carries high-energy electrons to the electron transport chain
D.Each molecule must be fully oxidized to carbon dioxide before any usable energy appears

Explanation

Core Concept

ATP is an immediate free-energy currency used to drive chemical, transport, and mechanical work through coupled reactions. In some cases ATP transfers a phosphate group; in others hydrolysis changes the conformation or interactions of a protein. NADH has a different role as a reduced electron carrier that can donate electrons to respiratory electron transport.

Correct Answer

CATP transfers phosphate groups to power cellular work directly, while NADH carries high-energy electrons to the electron transport chain

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