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Question

Accessory photosynthetic pigments in most green plants are

A
Chlorophyll a
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B
Chlorophyll b
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C
Carotenoids and xanthophylls
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D
Both (b) and (c)
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Solution

The correct option is D Both (b) and (c)
Chlorophyll a is found in almost all photosynthetic plants except bacteria it is called primary photosynthetic pigment because it performs primary reactions of photosynthesis which involve the conversion of light energy into chemical energy. other photosynthetic pigments like chlorophyll b, xanthophylls and carotenes are called accessory pigments. They absorb light energy of different wavelengths, broaden the spectrum of light absorption and hand over the energy to chlorophyll aq through electron spin resonance and also protect chlorophyll a from photo-oxidation.
So the correct option is 'both (b) and (c)'.

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