For the Hydrolysis of ATP to ADP + ᵢ

question 3

Multiple Choice

For the hydrolysis of ATP to ADP + ᵢ, the free energy change is -7.3 kcal/mol under standard conditions (1 M concentration of both reactants and products) . In the cellular environment, however, the free energy change is about -13 kcal/mol. What can we conclude about the free energy change for the formation of ATP from ADP and ᵢ under cellular conditions?

• A)It is +7.3 kcal/mol.
• B)It is less than +7.3 kcal/mol.
• C)It is about +13 kcal/mol.
• D)It is greater than +13 kcal/mol.
• E)The information given is insufficient to deduce the free energy change.

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Definitions:

Foreign Particles

Tiny, extraneous substances not naturally part of a system, often causing harm or disruption.

Active Site

Pocket in an enzyme where substrates react and are converted to products.

Substrate

Molecule that an enzyme acts upon and converts to a product; reactant in an enzyme-catalyzed reaction.

Oxidation-Reduction Reactions

Chemical reactions involving the transfer of electrons between two substances, altering their oxidation states and often producing energy.