The ΔG of ATP Hydrolysis in a Test Tube Under

question 21

Multiple Choice

The ΔG of ATP hydrolysis in a test tube under standard conditions is -7.3 kcal/mol. The ΔG for the reaction A+B C under the same conditions is +4.0 kcal/mol. How would the addition of an enzyme that catalyzes A+B C most likely alter the coupled reactions?

• A) It would increase the rate of production of C and decrease the overall ΔG for the coupled reactions.
• B) It would increase the rate of production of C and increase the overall ΔG for the coupled reactions.
• C) It would result in no change in the rate of production of C and decrease the overall ΔG for the coupled reactions.
• D) It would result in no change in the overall ΔG for the coupled reactions.

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