Which of the following statements is true with regard to the light reaction of photosynthesis? Options: A . &nbspIn PS – II reaction centre, chlorophyll – a has an absorption peak of 700 nm, hence called p700 B . &nbspIn PS – I, the reaction centre chlorophyll –a has an absorption maxima at 680 nm and is called p680 C . &nbspThe splitting of water molecule is associated with PS – I D . &nbspPhoto systems – I and II are involved in Z – scheme.

Which of the following statements is true with regard to the light reaction of p

Question

Which of the following statements is true with regard to the light reaction of photosynthesis?

Options:

A . In PS – II reaction centre, chlorophyll – a has an absorption peak of 700 nm, hence called p700

B . In PS – I, the reaction centre chlorophyll –a has an absorption maxima at 680 nm and is called p680

C . The splitting of water molecule is associated with PS – I

D . Photo systems – I and II are involved in Z – scheme.

Answer: Option D
:
D
Photophosphorylation is the synthesis of ATP from ADP and inorganic phosphate in the presence of sunlight. When the two photo systems, work in a series, first PS – II and then the PS – I, a process called non-cyclic phosphorylation occurs in the two photosystems that are connected through an electron transport chain in Z - scheme. (due to the shape of path of electrons flow). Both ATP and NADH + H⁺ are synthesized by this kind of electron flow.

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