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Accessory pigments (chlorophyll b, xanthophylls, carotenoids) function by
AAbsorbing extra wavelengths and transferring energy to chl a
BSynthesising ATP independently of chl a function
CSplitting water to give O2 in the lumen
DCarboxylating RuBP in the chloroplast stroma
Answer & Solution
Correct answer: A. Absorbing extra wavelengths and transferring energy to chl a
Accessory pigments widen the absorption spectrum and funnel energy to the chl a reaction centres. They also protect chl a from photo-oxidation (carotenoids quench singlet oxygen). They do not directly do chemistry.
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