When Electrons Flow Along the Electron Transport Chains of Mitochondria

question 76

Multiple Choice

When electrons flow along the electron transport chains of mitochondria, which of the following changes occurs?

• A) The pH of the matrix increases.
• B) ATP synthase pumps protons by active transport.
• C) The electrons gain free energy.
• D) The cytochromes phosphorylate ADP to form ATP.
• E) NAD⁺ is oxidized.

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Definitions:

Osmolality

The concentration of solutes per kilogram of solvent in a solution, important in regulating water balance and solute concentration in the body.

Solute Particles

Tiny components of a solution that are dissolved in a solvent, contributing to the chemical and physical properties of the solution.

Pure Water

Water that has been purified to remove impurities, consisting only of H2O molecules.

Acidity

A measure of the concentration of hydrogen ions in a solution, indicating how acidic or alkaline the solution is.