Upon the Addition of 2,4-Dinitrophenol (DNP) to a Suspension of Mitochondria

question 2

Multiple Choice

Upon the addition of 2,4-dinitrophenol (DNP) to a suspension of mitochondria carrying out oxidative phosphorylation linked to the oxidation of malate, what does NOT occur?

• A) Oxygen consumption decreases.
• B) Oxygen consumption increases.
• C) The P/O ratio drops from a value of approximately 2.5 to 0.
• D) The proton gradient dissipates.
• E) The rate of transport of electrons from NADH to O₂ becomes maximal.

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