1. What is the primary role of chlorophyll in photosynthesis?
    A. Absorption of water
    B. Absorption of light
    C. Transport of nutrients
    D. Conversion of glucose
    Answer: B. Absorption of light
  2. Which pigment is essential for capturing light energy in photosynthesis?
    A. Carotenoids
    B. Xanthophyll
    C. Chlorophyll
    D. Phycobilins
    Answer: C. Chlorophyll
  3. What color of light is least absorbed by chlorophyll?
    A. Red
    B. Blue
    C. Green
    D. Violet
    Answer: C. Green
  4. In which part of the chloroplast is chlorophyll found?
    A. Stroma
    B. Thylakoid membrane
    C. Outer membrane
    D. Inner membrane
    Answer: B. Thylakoid membrane
  5. Chlorophyll primarily absorbs which colors of light?
    A. Red and blue
    B. Green and yellow
    C. Orange and purple
    D. Green and blue
    Answer: A. Red and blue
  6. What is the role of magnesium in the chlorophyll molecule?
    A. Transporting electrons
    B. Absorbing carbon dioxide
    C. Serving as the central atom for light absorption
    D. Fixing nitrogen
    Answer: C. Serving as the central atom for light absorption
  7. Which type of chlorophyll is most common in plants?
    A. Chlorophyll A
    B. Chlorophyll B
    C. Chlorophyll C
    D. Chlorophyll D
    Answer: A. Chlorophyll A
  8. Which process directly depends on chlorophyll in photosynthesis?
    A. Carbon fixation
    B. ATP synthesis
    C. Light absorption and conversion to chemical energy
    D. Water absorption
    Answer: C. Light absorption and conversion to chemical energy
  9. **The tail of a chlorophyll molecule is: **
    A. Polar
    B. Hydrophobic
    C. Hydrophilic
    D. Ionic
    Answer: B. Hydrophobic
  10. What happens to chlorophyll when it absorbs light?
    A. It becomes oxidized
    B. It releases oxygen
    C. Electrons become excited
    D. It breaks down
    Answer: C. Electrons become excited
  11. The green color of chlorophyll is due to its ability to reflect which wavelength of light?
    A. Blue
    B. Red
    C. Green
    D. Violet
    Answer: C. Green
  12. Chlorophyll absorbs light most effectively at which wavelengths?
    A. 400-450 nm and 650-700 nm
    B. 500-550 nm
    C. 700-750 nm
    D. 300-350 nm
    Answer: A. 400-450 nm and 650-700 nm
  13. The head of the chlorophyll molecule is called:
    A. Porphyrin ring
    B. Carbon tail
    C. Lipid chain
    D. Protein chain
    Answer: A. Porphyrin ring
  14. Which accessory pigment assists chlorophyll in photosynthesis?
    A. Hemoglobin
    B. Carotenoids
    C. Keratin
    D. Urobilin
    Answer: B. Carotenoids
  15. What is the primary function of chlorophyll B?
    A. Storing energy
    B. Fixing carbon dioxide
    C. Absorbing light wavelengths not absorbed by chlorophyll A
    D. Breaking down glucose
    Answer: C. Absorbing light wavelengths not absorbed by chlorophyll A
  16. Chlorophyll A is predominantly found in:
    A. Cyanobacteria and higher plants
    B. Fungi and algae
    C. Animals
    D. Soil microbes
    Answer: A. Cyanobacteria and higher plants
  17. What happens to chlorophyll in the fall season in deciduous plants?
    A. It increases
    B. It degrades
    C. It converts into carotenoids
    D. It becomes inactive
    Answer: B. It degrades
  18. Which reaction center is associated with chlorophyll A?
    A. PSI and PSII
    B. PSI only
    C. PSII only
    D. Cytoplasmic reactions
    Answer: A. PSI and PSII
  19. The chemical formula of chlorophyll A is:
    A. C55H72MgN4O5
    B. C35H70MgO4
    C. C20H25N4O2
    D. C40H56O6
    Answer: A. C55H72MgN4O5
  20. Chlorophyll is essential for which type of photosynthesis?
    A. Chemoautotrophic
    B. Photoautotrophic
    C. Heterotrophic
    D. Saprotrophic
    Answer: B. Photoautotrophic
  21. Which of the following organisms lack chlorophyll?
    A. Cyanobacteria
    B. Fungi
    C. Algae
    D. Bryophytes
    Answer: B. Fungi
  22. Chlorophyll plays a role in which stage of photosynthesis?
    A. Light-dependent reaction
    B. Calvin cycle
    C. Glycolysis
    D. Krebs cycle
    Answer: A. Light-dependent reaction
  23. What does chlorophyll produce during photosynthesis?
    A. Glucose
    B. Oxygen
    C. Excited electrons
    D. NADPH
    Answer: C. Excited electrons
  24. Which factor does NOT affect chlorophyll function?
    A. Light intensity
    B. Temperature
    C. Presence of oxygen
    D. Water availability
    Answer: C. Presence of oxygen
  25. Chlorophyll B absorbs light most efficiently in which wavelength range?
    A. 500-550 nm
    B. 400-450 nm
    C. 650-700 nm
    D. 700-750 nm
    Answer: A. 500-550 nm
  26. Chlorophyll contains which metal ion?
    A. Magnesium
    B. Iron
    C. Copper
    D. Zinc
    Answer: A. Magnesium
  27. Which process is initiated by chlorophyll in photosynthesis?
    A. Splitting of water molecules
    B. Production of starch
    C. Reduction of NADP+
    D. Fixation of CO2
    Answer: A. Splitting of water molecules
  28. What is the first step of photosynthesis involving chlorophyll?
    A. ATP synthesis
    B. Absorption of light energy
    C. Glucose formation
    D. Oxygen release
    Answer: B. Absorption of light energy
  29. What is the role of accessory pigments like carotenoids?
    A. Reduce the need for chlorophyll
    B. Absorb additional light wavelengths
    C. Generate oxygen directly
    D. Store light energy
    Answer: B. Absorb additional light wavelengths
  30. Why does chlorophyll appear green?
    A. It absorbs all light except green
    B. It reflects red light
    C. It emits green light
    D. It absorbs blue light only
    Answer: A. It absorbs all light except green

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