Which Statement Best Describes How the Interconversion of ATP and ADP

question 1

Multiple Choice

Which statement best describes how the interconversion of ATP and ADP is responsible for storing and providing energy for cellular reactions?

• A)Energy is stored in ADP and released when ADP adds a phosphate group.
• B)Energy is stored in ADP and released when the phosphoanhydride bond of ATP is broken.
• C)Energy is stored in ATP and released when ADP undergoes phosphorylation.
• D)Energy is stored in ATP and released when the phosphoanhydride bond of ATP is broken.
• E)Energy requiring reactions of the cell drive the phosphorylation of ADP.

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Definitions:

Standard Gibbs Free Energy

A thermodynamic property used to predict the direction of chemical reactions and the extent to which reactions proceed.

Enthalpy

A thermodynamic property representing the total heat content of a system, used to quantify the heat changes that occur in chemical reactions at constant pressure.

Entropy

A measure of the disorder or randomness in a system, often related to the number of available states a system can occupy.

% Conversion

The percentage indicating how much of the reactants have been transformed into products in a chemical reaction.