48. The ultimate electron acceptor in the electron transport chain is (A) NAD+ (B) FAD. (C) oxygen. (D) ADP.

3. In the sodium-potassium pump (A) sodium is transported out of the cell and potassium into the cell, both against concentration gradients (B) sodium is transported into the cell and potassium out of the cell, both against concentration gradients (C) sodium is transported out of the cell and potassium into the cell, both in the same direction as concentration gradients (D) sodium and potassium are both transported out of the cell against concentration gradients

48. The ultimate electron acceptor in the electron transport chain is
(A) NAD+
(B) FAD.
(C) oxygen.
(D) ADP.

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