ATP and reaction coupling

A scientist hydrolyzes ATP in a laboratory test tube. He finds that about 3 times as much heat is released than when the same amount of ATP is hydrolyzed in a cell.

What best explains the scientist's observation?

(Choice A)
ATP hydrolysis in a cell makes different products than in a test tube.
(Choice B)
Enzymes in cells use heat energy to catalyze reactions.
(Choice C)
Cells are less efficient at producing heat.
(Choice D)
Cells often convert some of the energy from ATP hydrolysis into other usable forms.

Biology library

Course: Biology library > Unit 7

Problem