Q.

Statement I: Chlorophyll a is the chief pigment in light reaction of photosynthesis.Statement II: Chlorophyll a pigment alone absorbs the light energy in a photosystem.

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Statement I and II both are true

Statement I is true but statement II is false

Statement I is false but statement II is true

Statement I and II both are false

answer is 2.

(Detailed Solution Below)

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Detailed Solution

Though chlorophyll a is the major pigment responsible for trapping light, other thylakoid pigments like chlorophyll b, xanthophylls and carotenoids, which are called accessory pigments, also absorb light and transfer the energy to chlorophyll a. Therefore, these pigments enable a wider range of wavelength of incoming light to be utilised during photosynthesis.

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