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Q.
Reaction centre of $PS I$ is and reaction centre of $PS II$ is______ .
Photosynthesis in Higher Plants
Solution:
The reaction center of photosystem $I (PS I)$ is referred to as $P_{700}$, where$ "P"$ stands for "Pigment" and $"700"$ stands for the wavelength of light that this particular chlorophyll molecule absorbs most strongly. The reaction center of photosystem $II (PS II)$ is referred to as $P_{680}$ for comparable reasons.