This preview has intentionally blurred sections. Sign up to view the full version.View Full Document
Unformatted text preview: 680 . Photosystem I evolved very early; photosystem II evolved later. Details of the Light-Dependent Reactions Photosystem II The diagrams that follow are less magnified views of the chloroplast and thylakoid shown in the diagram above. The antenna shown above is represented by a single green circle below. Notice that there are two photosystems and therefore two antennas. The blue circles represent the electron transport system (discussed later). During the light reactions, pigment molecules within the P 680 antenna absorb a photon of light energy. The energy from that molecule is passed to neighboring molecules and eventually makes its way to the reaction center molecule as previously described. When the reaction center molecule becomes excited, it loses its electron to an electron acceptor....
View Full Document
This note was uploaded on 12/15/2011 for the course BIO BSC1010 taught by Professor Gwenhauner during the Fall '10 term at Broward College.
- Fall '10