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

question 27

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,all of the following occur except:

• 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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