Question

QUESTION 2 What is the main mechanism of action for oxidative phosphorylation? A Uses the free energy of the proton gradient generated as a result of transferring electrons from NADH OF FADH2 to O2 by a series of electron carriers for ATP production B. Uses the net yield of ATP produced by Glycolysis and the Citric Acid Cycle to produce more ATP. Uses the free energy released during redox reactions in Complexes I-IV (the electron transport chain) and is uncoupled to Complex V (ATP synthase) To make more ATP from outside sources such as extracellular proteins.

Answer 1

The correct answer is first option i,e A.

The hydrogen ion gradient created by the pumping of protons during the electron transport chain is used for ATP formation. The proton gradient is created by electron transfer through 4 protein complexes present in inner mitochondrial membrane and these electrons are donated by NADH_​​​2 or FADH_2. The protons flow down the concentration gradient into the matrix through ATP synthase (F0-F1 complex or complex 5), causing it to spin and generates ATP from ADP and Pi.

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