ATP Hydrolysis in a Test Tube Releases Only About Half

question 6

Multiple Choice

ATP hydrolysis in a test tube releases only about half as much energy as ATP hydrolysis in the cell.Which of the following statements is the best explanation for this observation?

• A)Cells maintain higher internal pressure,which speeds up the reaction rate.
• B)Reactant and product concentrations in the cell are different from the standard conditions used in a test tube.
• 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.

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