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Question

The highest rate of photosynthesis in green plants is in .......... and .......... region of light spectrum.

A
Yellow and orange
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B
Green and violet
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C
Red and blue
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D
Violet and blue
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Solution

The correct option is C Red and blue
The maximum photosynthesis takes place in blue and red regions of the visible light as indicated by the absorption spectra of chlorophyll a and chlorophyll b. Absorption spectrum of a particular pigment is the curve plotted on a graph paper representing the amount of light absorbed at each wavelength by that pigment. The absorption spectra of these pigments show that they absorb maximum at 480 nm (blue light) and 680 nm (red light) regions of spectrum.
Thus, the correct answer is option C.

679117_639529_ans_ccea6cb8cbd34a10a401a9864f3fe1c8.png

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