Carotenoids are made up of units of ......

Which property of the pigment is responsible for its ability to initiate the process of photosynthesis? Why is the rate of photosynthesis higher in the red and blue regions of the spectrum of light?

How many chlorophyll molecules combine to form quantasomes?

Explain Light harvesting complexes $(LHC)$.

What can we conclude from the statement that the action and absorption spectrum of photosynthesis overlap? At which wavelengths do they show peaks?

Chlorophyll '$a$' and '$b$' show maximum absorption in