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13 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Photosystems do what?
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captured light energy that can be transferred to other molecules to produce energy intermeditaes
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What does the thylakoid membrane of chloroplast contain?
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protein complexes and pigment.
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What are the two different protein complexes and pigments in the thylakoid membrane called?
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Photosystem (I) – discovered first. Photosystem(II) – occurs first
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What happens in the pigment molecules in PSII and PSI
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Light excites the pigment molecules
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what happens in the PSII? (general statement)
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Excited electrons travel to PSI
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What happens in PSII? (3 steps specific)
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– water is oxidized generating O2 and H+– Release of electrons into the transport chain– energy used to make H+ electrochemical gradient
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What happens in PSI?
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NADPH is made by the addition of H+ through the electrochemical gradient
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What happens to H+ in PSI? (3 steps)
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There is an H+ gradient created by 3 things that is pushing H+ through the ETC using ATP Synthase.
1. H+ in thylakoid lumen by splitting water. 2.H+ by ECT pumping H+ into lumen.3. H+ from formation of NADPH in stroma |
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What is the process of ATP Synthesis?
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1. Chemiosmotic(relating to the movement of ions across a semipermeable membrane).
2. Driven by flow of H+ from thylakoid lumen into stroma via ATP synthase. |
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What happens to the flow of Electrons in PSII and PSI? (2 steps)
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Electrons begin at PSII and eventually transfer to NADPH. Linear process produces ATP and NADPH in equal amounts.
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Where does Cyclic photophosphorylation happen?
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PSI
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What happens in cyclic photophosphorylation? (3 part)
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1. Light excites electrons in PSI.
2. High energy electrons sent to ferrodoxin. 3. Cyclic electron flow favored when NADPH level is high |
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What are the Noncyclic parts of PSI and PSII?
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1. Electrons begin at PSII and eventually transfer to NADPH.
2. Linear process produces ATP and NADDPH in equal amounts. |
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