First slide

What is Light Reaction?

Question

Which is true for PS II?

Easy

A

It is involved in both cyclic and non-cyclic photophosphorylation.
B

It is never involved with spitting of water molecules.
C

It has chlorophyll a in its reaction center whose absorption maxima is at 680 nm.
D

The reaction centre chlorophyll a has an absorption peak at 700 nm.

Solution

PS II it has reaction center with specialised chlorophyll a whose absorption maxima is at 680 nm, and is called P680. It is involved only in non-cyclic photophosphorylation. It is associated with oxygen evolving complex and involved in splitting of water molecules.

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