73. Photosynthetic pigments in the thylakoid are light receptors. Which is NOT CORRECT? (A) Chlorophyll a, which participates directly in the light reactions and absorbs best in the red and violet-blue wavelengths and absorbs least in the green, participates directly in the light reactions, but accessory photosynthetic pigments absorb light and transfer energy to chlorophyll a. (B) Accessory pigments include chlorophyll b, carotenoids, and anthocyanin. (C) An overall action spectrum for photosynthesis profiles the relative effectiveness of different wavelengths of radiation in driving the process. The action spectrum of photosynthesis was first demonstrated in 1883 in a clever experiment performed by Thomas Engelmann. (D) The action spectrum of photosynthesis does not match exactly the absorption spectrum of any one photosynthetic pigment, including chlorophyll a. (E) Each light-harvesting complex consists of pigment molecules (which may include chlorophyll a, chlorophyll b, and carotenoids) bound to proteins, in which the light-harvesting complexes act as an antenna for the reaction-center complex.