A. ATP is the universal energy currency of the cell. B. The hydrolysis of ATP to ADP + Pi is endergonic. C. NADH and $FADH_2$ are electron carriers. D. The electron transport chain is located in the inner mitochondrial membrane. E. Cyanide inhibits cytochrome oxidase (Complex IV), blocking ATP synthesis.

Which coenzyme is required for the pyruvate dehydrogenase complex? A) Biotin B) Thiamine pyrophosphate (TPP) C) Coenzyme A only D) Tetrahydrofolate E) S-adenosylmethionine

: Multiple questions linked to one statement; an error in the first can ruin the set.