25.

In liver, how do the electrons of cytoplasmic NADH gain access to the mitochondrial matrix?

• a. via reduction of oxalate to malate in the cytosol followed by transport of malate into the mitochondria
• b. via transport of cytoplasmic NADH into the mitochondria, using a NADH/OH- antiport
• c. via reduction of dihydroxyacetone phosphate to glycerol phosphate, followed by transport of glycerol phosphate into the mitochondria
• d. via direct reduction of Complex I, using a site on the cytoplasmic side of the inner mitochondrial membrane