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in the presence of oxygen and in the absence of adp, what occurs if the uncouple

ID: 860022 • Letter: I

Question

in the presence of oxygen and in the absence of adp, what occurs if the uncouple 2,4-dinitrophenol is added to a suspension of normal mitochondria five minutes after an oxidizable substrate has been added

a) The substrate cannot be oxidized either with or without 2,4-dinitrophenol unless ADP is also present.

b) Oxidation of the substrate does not occur until the 2,4-dinitrophenol is added. Afterward, oxidation proceeds rapidly until all of the substrate is consumed.

c)There is no effect; oxidation of the substrate continues at the same rate before and after the addition of 2,4-dinitrophenol.

Explanation / Answer

Option b) is correct.