In the photosynthetic systems the redox metalloproteins involved in electron transfer are cytochrome (cyt, b), cytochrome bf complex (cyt bf) and plastocyanin (PC). The pathway of electron flow is
(a)PC → cyt b → cyt bf
(b)cyt bf→ cyt b→ PC
(c)cyt b → cyt bf →PC
(d)PC → cyt bf → cyt b
Answer
Answer: C ✓ checked by 4AB · confidence high
Explanation
In the photosynthetic chain electrons pass from cytochrome b through the cytochrome b₆f complex to plastocyanin, which delivers them to photosystem I.