Q.

Reaction centre of PS I is ____ and reaction centre of PS II is ___

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a

P700 ; P900

b

P700 ; P680

c

P680 ; P100

d

P800 ; P600

answer is B.

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Detailed Solution

The reaction centre of photosystem I (PS I) is referred to as P700 where "P" stands for "Pigment" and "700" stands for the wave length of light that this particular chlorophyll molecule absorbs most strongly. The reaction centre of photosystem II (PS II) is referred to as P680 for comparable reason.

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