Question

If 2, 4-dinitrophenol is added to tightly coupled mitochondria that are actively oxidizing succinate ____________

(a) Electron flow will continue but ATP synthesis will not occur

(b) Electron flow will continue but ATP synthesis will be increased

(c) Electron flow will cease but ATP synthesis will continue

(d) Both electron flow and ATP synthesis will be ceased

Answer 1

The correct option is (a) Electron flow will continue but ATP synthesis will not occur

To explain: Electron transfer is catalyzed from succinate or NADH to O2 but no ATP synthesis is coupled to this respiration.