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Which fractions of the visible spectrum of solar radiations are primarily absorbed by carotenoids of the higher plants?

1. Violet and blue
2. Blue and green
3. Green and red
4. Red and violet

Correct answer: Violet and blue

Solution

Carotenoids in higher plants absorb mainly in the short-wavelength region of visible light, especially violet and blue. This helps them transfer energy to chlorophyll and protect the photosynthetic apparatus from excess light.

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