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    Question

    Chlorophyll-a is present in all photosynthetic organisms

    except
    A green algae Correct Answer Incorrect Answer
    B photosynthetic bacteria Correct Answer Incorrect Answer
    C green sulfur bacteria Correct Answer Incorrect Answer
    D higher plants Correct Answer Incorrect Answer

    Solution

    Green sulfur bacteria lack chlorophyll-a, relying on bacteriochlorophyll for photosynthesis. Chlorophyll-a is found in higher plants, green algae, and photosynthetic bacteria. Information Booster:                     

    1. Chlorophyll-a is the primary pigment in oxygenic photosynthesis.
    2. Green sulfur bacteria perform anoxygenic photosynthesis.
    3. Bacteriochlorophyll absorbs light wavelengths different from chlorophyll-a.

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