Which photosystem is inactive in the red drop | vedclass

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Question

(C) The red drop phenomenon refers to the sharp decrease in the rate of photosynthesis when plants are exposed to monochromatic light with wavelengths

Vedclass · Accepted Answer

$PS-II$

Vedclass · Answer

(C) The red drop phenomenon refers to the sharp decrease in the rate of photosynthesis when plants are exposed to monochromatic light with wavelengths greater than $680 \ nm$.This occurs because $PS-II$ (Photosystem $II$) is primarily excited by light wavelengths up to $680 \ nm$.When the wavelength exceeds $680 \ nm$,$PS-II$ becomes inactive,leading to a drop in the photosynthetic rate as the electron transport chain is disrupted.

Which photosystem is inactive in the red drop phenomenon?

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