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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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40. Mention the functions of carotenoids.

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