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Choose the incorrect statement
Option: 1
In cyclic electron flow, only Photosystem is used in order to produce ATP
Option: 2
In cyclic photophosphorylation, are not produced as byproducts
Option: 3
Oxygen is not evolved in cyclic photophosphorylation.
Option: 4
In cyclic photophosphorylation, donor and final electron acceptors are same plastoquinone.
Answers (1)
Light Reaction: Cyclic Photophosphorylation -
- In cyclic electron flow, only Photosystem 1 is used in order to produce ATP as a product but does not create any NADPH or O2 as a byproduct.
- Only occurs when plant cells are in need of ATP.
- It was discovered by Frankel in Purple-Sulphur bacteria.
- As the light rays fall on the reaction centre, the chl. a molecule gets excited and passes these electrons to the molecule that has the ability to get reduced i.e. molecule with greater redox potential.
- After losing the electron the photocentre becomes oxidized. The expelled electron passes through a series of carriers.
- The electrons are returned by plastocyanin (Pc) to the P700 pigment in the reaction centre to complete the cycle.
-
In cyclic photophosphorylation, donor and final electron acceptors are same i.e. . Hence, the correct answer is option d.
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