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Solution


Q.

Function/s of accessory pigments is/are
I.   They enable wider range of wavelength of incoming light for photosynthesis
II.  They absorb light and transfer the energy to chlorophyll-a
III. They protect reaction centre from photo-oxidation
Select the correct option
 a) I and II     b) II and III         c)    Only I         d)    I, II and III
1 A
2 B
3 C
4 D

Ans.

(d) 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. Indeed, they not only enable a wider range of wavelength of incoming light to be utilised for photosynthesis but also protect chlorophyll-a from photooxidation