Biology / Unit 3 Bio 0591 short lesson, about 20 seconds
Photosystem Structure
Captions available
The idea
A photosystem pairs a light-harvesting complex of antenna pigments with a reaction center, funneling light energy to a special chlorophyll a pair that releases an electron.
In practice
Hundreds of antenna pigments in one photosystem pass captured energy inward until it reaches the reaction center.
Where people slip
Only energy, not an electron, passes between antenna pigments — an electron releases only at the reaction center.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
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