Respuesta :
An electron is stimulated from the ground state to a higher energy level as a result of the absorption of a photon in the PAR range by a photosynthetic pigment.
These excited states can go from one pigment molecule to another, but because moving from carotenoids and chlorophyll b to chl an is energetically less favourable, excited states created on those pigment molecules end up on chl a.
What is a Photosystem ?
The functional components of photosynthesis are called photosystems, and they are identified by specific pigment organisation and association patterns.
- Photosystems are responsible for absorbing and transferring light energy, which implies transferring electrons. The thylakoid membranes contain photosystems in terms of physical location.
- Photosystem I and Photosystem II have been identified in plants and algae. Each of them consists of chlorophyll molecules, accessory pigments, proteins and other molecules.
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