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31. Where light reaction occur in C₄Plants ?

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32. Define the term photosynthesis and give two of its significance.

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33. What is light compensation point ?

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34. Prove that the oxygen comes from water and not from the carbon dioxide.

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35. Describe the effect of oxygen on photosynthesis.

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36. Describe Robin Hill experiment.

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37. Describe internal factors affecting photosynthesis.

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38. Write a note on photosynthetic unit.

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39. Write notes on photosystem I and II.

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Functions of Carotenoids :

1. Carotenoids function as accessory pigments. They absorb radiant energy in the mid region of visible spectrum.

2. They protect the chloroplast constituents from nascent oxygen released during photolysis of water.

3. Carotenoids provide colour to the flowers and fruits that help in pollination and dispersal.

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