Which of the following is the best explanation for this observation? When 10,000 molecules of ATP are hydrolyzed to ADP and Pi in a test tube, about twice as much heat is liberated as when a cell hydrolyzes the same amount of ATP.
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A. Cells are open systems, but a test tube is a closed system. B. Cells are less efficient at heat production than nonliving systems. C. The hydrolysis of ATP in a cell produces different chemical products than does the reaction in a test tube. D. The reaction in cells must be catalyzed by enzymes, but the reaction in a test tube does not need enzymes. E. Cells convert some of the energy of ATP hydrolysis into other forms of energy besides heat.
The answer to this is letter E. Cells convert some of the energy of ATP hydrolysis into other forms of energy besides heat. This is something that happens to the body all the time. The body is like an enclosed space too. The energy of ATP does not always result in getting more heat.
A lot of times, the energy is used for different purposes. It can be used by people to move. It can be used by people to think. The energy received from the cells can be used for the various situations that people have to go through every day. Cells are very much efficient and even more so than non-living systems for sure.