Biology PYQ 47 of 227 · Plant Physiology: Photosynthesis, Respiration & Nutrition

Chlorophyll absorbs _________ wavelengths of the sunlight.

  1. Ared and blue
  2. Bgreen and blue
  3. Cgreen and red
  4. DMore than one of the above
  5. ENone of the above

68th BPSC

Show answer and explanation

Correct answer: (a) red and blue

Explanation

Chlorophyll absorbs most strongly in the blue (~450 nm) and red (~650-700 nm) regions of sunlight.

It reflects green light, which is why leaves appear green – so green is not absorbed.

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