Which of the following takes part directly in the process of photosynthesis and is NOT an accessory pigment?

Chlorophyll b

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Chlorophyll a

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Carotene

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Xanthophyll

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Solution

The correct option is B
Chlorophyll a

Accessory pigments are light-absorbing pigments, found in photosynthetic organisms, that work in conjunction with chlorophyll a. Chlorophyll b, carotene and xanthophyll are called accessory pigments as they do not directly take part in photosynthesis whereas chlorophyll a directly takes part in photosynthesis by absorbing sunlight.

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Chlorophyll-'a' is the primary pigment for the light reaction. What are accessory pigments? What is their role in photosynthesis?

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