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Question

The active component of photosystem -I is composed of


A

Chlorophyll-a with absorption peak at 680nm

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B

Chlorophyll-a with absorption peak at 700nm

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C

Chlorophyll-h with absorption peak at 680nm

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D

Chlorophyll-a & h with absorption peak at 700nm

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Solution

The correct option is B

Chlorophyll-a with absorption peak at 700nm


The reaction centre is different in both the photosystems. In PS I the reaction centre chlorophyll a has an absorption peak at 700 nm, hence is called P700, while in PS II it has absorption maxima at 680 nm, and is called P680.


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