Photosystems - The antenna, the reaction center, and the...

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Photosystems The closely packed pigment molecules and the reaction center form a unit referred to as an antenna complex . Photons of light that are picked up by any of the pigment molecules in the antenna pass their energy to nearby pigment molecules until it is eventually passed to a special molecule of chlorophyll a called the reaction center . The reaction center molecule becomes ionized and it loses its electron to an electron acceptor. This electron will need to be replaced.
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Unformatted text preview: The antenna, the reaction center, and the electron transport molecules make up a photosystem. There are two kinds of photosystems in eucaryotes. The reaction center chlorophyll molecule of photosystem I absorbs 700 nm light best and is therefore called P 700 . The reaction center of photosystem II absorbs 680 nm light best and is called P 680 . Photosystem I evolved very early; photosystem II evolved later....
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This note was uploaded on 11/10/2011 for the course BIOLOGY bi 101 taught by Professor - during the Fall '10 term at Montgomery.

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