7. The terminal electron acceptor during the light phase of photosynthesis in green plants is(A)Hydrogen (H2→ H2О).(B)NAD+(→ NADH).(C)NADP+ (→ NADPH).(D)Oxygen (O2→ H2O).(E) Sulfur (→ H2S).

12. In the reoxidation of QH2 by purified ubiquinone-cytochrome c reductase (Complex III) from heart muscle, the overallstoichiometry of the reaction requires 2 mol of cytochrome e per mole of QH2 because:(A)cytochrome c is a one-electron acceptor, whereas QH₂ is a two-electron donor.(B)cytochrome c is a two-electron acceptor, whereas QH₂ is a one-electron donor.(C)cytochrome c is water soluble and operates between the inner and outer mitochondrial membranes(D)heart muscle has a high rate of oxidative metabolism, and therefore requires twice as much cytochrome c as QH, forelectron transfer to proceed normally.(E)two molecules of cytochrome c must first combine physically before they are catalytically active.

7. The terminal electron acceptor during the light phase of photosynthesis in green plants is
(A)Hydrogen (H₂→ H₂О).
(B)NAD⁺(→ NADH).
(C)NADP⁺ (→ NADPH).
(D)Oxygen (O₂→ H₂O).
(E) Sulfur (→ H₂S).

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