A) NADPH
B) ATP and NADPH
C) ATP, NADPH and Oz
D) ATP
Correct Answer: D
Solution :
| [D] Cyclic-photophosphorylation involves only pigment system-I. When the photons activate PS-I, a pair of electrons are raised to a higher energy level. They are captured by primary acceptor, which passes them on to ferredoxin, plastoquinone, cytochrome complex, plastocyanin and finally back to reaction centre of PS-I, ie, \[{{\text{P}}_{\text{700}}}\]. At each step of electron transfer, the electrons lose potential energy. Their trip down hill is caused by the transport chain to pump \[{{\text{H}}^{\text{+}}}\] across the thylakoid membrane. The proton gradient thus established is responsible for farming ATP (2 molecules). No reduction of NADP to NADPH \[\text{+}{{\text{H}}^{\text{+}}}\]. |
You need to login to perform this action.
You will be redirected in
3 sec
