NEET Biology question
The Z-scheme of photophosphorylation follows the sequence: PS-II -> acceptor -> ETS -> PS-I -> electron acceptor -> NADP+, with transfers labelled A (PS-II to acceptor), B (acceptor through ETS to PS-I and PS-I to its own acceptor), C, and D (acceptor to NADP+). Which option correctly describes A, B, C and D as uphill or downhill transfers?
Answer: (A)
Solution
Excitation of the reaction-centre electron by light is an energetically "uphill" jump (A, and similarly at PS-I, C), while the subsequent transfer of
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