ATP hydrolysis in a test tube releases only about half as much energy as ATP hydrolysis in the cell. Which of the following is the best explanation for this observation?
A) Cells maintain higher internal pressure, which speeds up the reaction rate.
B) ATP hydrolysis in a test tube occurs under standard conditions; in the cell, reactant and product concentrations differ from standard conditions.
C) ATP hydrolysis in a cell produces different products than ATP hydrolysis in a test tube.
D) ATP hydrolysis in cells is catalyzed by enzymes, which releases more energy than the uncatalyzed reaction in a test tube.

Question

Quizplus · Accepted Answer

In cells, the concentrations of reactants and products are not at standard conditions, which affects the energy released during ATP hydrolysis.

ATP Hydrolysis in a Test Tube Releases Only About Half