7. Which one is the final electron acceptor in the electron transport chain?(A)complex IV(B)oxygen(C)coenzyme Q(D)cytochrome C

6. Which one of the following statements is true about catabolic pathways?(A)They combine molecules into more complex and energy-rich molecules.(B)They belong to the reduction reaction.(C)They are usually coupled with anabolic pathways and generate energy in the form of ATP.(D)They do not need enzyme catalysts.