Mcqs | Role of Chlorophyll in Photosynthesis

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  1. The thylakoid membranes of chloroplasts contain:
    (A) Nucleus (B) Mitochondria (C) Ribosomes (D) Pigments
  2. The main pigment of photosynthesis is:
    (A) Chlorophyll-b (B) Carotenoids (C) Chlorophyll-a (D) Xanthophyll
  3. Accessory pigments include:
    (A) Chlorophyll-a only (B) Chlorophyll-b and carotenoids (C) DNA and RNA (D) Enzymes and proteins
  4. The main function of pigments in photosynthesis is:
    (A) To store starch (B) To absorb sunlight and convert it into chemical energy (C) To transport water (D) To release oxygen
  5. Approximately how much light falling on a leaf is absorbed for photosynthesis?
    (A) 10% (B) 5% (C) 1% (D) 50%
  6. Which lights are most effective in photosynthesis?
    (A) Yellow and green (B) Orange and violet (C) Blue and red (D) Black and white
  7. Chlorophyll-a absorbs light of:
    (A) Yellow and green wavelengths (B) Blue and red wavelengths (C) Infrared wavelengths (D) Ultraviolet wavelengths
  8. The wavelengths not absorbed by chlorophyll-a are:
    (A) Wasted (B) Converted into glucose directly (C) Absorbed by accessory pigments (D) Destroyed by enzymes
  9. When pigments absorb light, what happens first?
    (A) ATP is formed directly (B) Oxygen is released (C) Electrons are released (D) Carbon dioxide is fixed

  10. The high-energy electrons released from pigments are used for:
    (A) Formation of glucose directly (B) Absorption of more water (C) Formation of ATP and reduction of NADP to NADPH (D) Transport of minerals

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