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Why is chlorophyll-a called an essential...

Why is chlorophyll-a called an essential pigment?

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Chlorophyll-a is the only pigment that can absorb and convert light energy into chemical energy, hence it is called essential pigment .
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Knowledge Check

  • Chlorophyll b. chlorophyll d and cholorophyll c are major pigments in________. _______.and _________.respectively

    A
    Chlorophyceae, phaeophyceae and rhodophyceae
    B
    Phaeophyceae, rhodophyceae and chlorophyceae
    C
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    D
    Chlorophyceae, rhodophyceae and phaeophyceae

  • $ Nostoc has chloropyll "a" and phycocyanin pigments. ! Chlorophyll "a" helps in oxygenic photosynthesis.

    A
    If both As and R are correct and R is correct explanation of As
    B
    If both As and R are correct but R is not correct explanation of As
    C
    If As is correct, R is wrong
    D
    If both As and R are wrong.

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    Suppose there were plants that had a high concentration of Chlorophyll-b, but lacked chlorophyll-a, would it carry out photosynthesis? Then why do plants have chlorophyll-b and other accessory pigments?

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