Why Is the ΔG of ATP Hydrolysis in the Cell

question 29

Multiple Choice

Why is the ΔG of ATP hydrolysis in the cell about twice as great as the ΔG of ATP hydrolysis in a test tube under standard conditions?

• A) A cell is an open system, whereas a test tube is a closed system.
• B) ATP hydrolysis in a test tube releases more heat than ATP hydrolysis associated with cellular metabolism.
• C) Reactant and product concentrations in the test tube are different from those in the cell.
• D) ATP hydrolysis in cells is catalyzed by enzymes, whereas the reaction in a test tube occurs spontaneously.

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Definitions:

360-Day Year

A simplified accounting method that assumes there are 360 days in a year, used for calculating interest and other financial metrics.

Principal

The original sum of money borrowed in a loan, or the initial amount of investment, excluding interest or profit.

Ordinary Simple Interest

Interest calculated on the principal amount only, without compounding, over a specific period.

360-Day Year

An accounting convention used for interest calculations where the year is simplified to 360 days to ease the computation process.