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Home Q & A Board Biology-Related Homework Help Zoology and Botany (Moderator: ehd123)
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plwebb1 plwebb1
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9 years ago
If so, why? Do they not do the same thing?
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#1
9 years ago
Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids. Many Prokaryotes have only one photosystem, Photosystem II (so numbered because, while it was most likely the first to evolve, it was the second one discovered). Eukaryotes have Photosystem II plus Photosystem I. Photosystem I uses chlorophyll a, in the form referred to as P700. Photosystem II uses a form of chlorophyll a known as P680.
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#2
9 years ago
Photosystem I clusters boost electrons to a higher energy state by absorbing light with a wavelength of 700 nm (nanometers).

Photosystem II clusters do the same thing except with light that has a wavelength of 680 nm.

So, they aren't necessarily the same thing Nerd Face
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