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Question

Which of the following light is required for photosynthesis?

A
Green
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B
Yellow
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C
Blue and red
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D
Yellow and violet
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Solution

The correct option is C Blue and red
Photosynthesis occurs in only a part of visible spectrum called as PAR or photosynthetically active region. This region spans from 400 nm to 700 nm wavelength of light. Most of the photosynthesis occurs in blue and red light. Maximum photosynthesis occurs in red light followed by blue light.

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