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Questions and Answers
What is the process called when a photon energizes chlorophyll and splits water into hydrogen and oxygen ions?
What is the process called when a photon energizes chlorophyll and splits water into hydrogen and oxygen ions?
- Photolysis
- Photophosphorylation
- Photoexcitation
- Cyclic Photophosphorylation (correct)
What two stages does the light reaction occur in?
What two stages does the light reaction occur in?
- Photolysis and Photoexcitation (correct)
- Photoexcitation and Photophosphorylation
- Photophosphorylation and Photolysis
- Photolysis and Photophosphorylation
What is produced by the photolysis of water?
What is produced by the photolysis of water?
- Oxygen
- Hydrogen
- Chlorophyll
- ATP (correct)
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Study Notes
- In the light reaction, a beam of photons energizes chlorophyll and causes it to release an electron, which in turn splits water into hydrogen ions and oxygen ions.
- This process is called photolysis of water and produces ATP.
- Another name for this process is cyclic photophosphorylation.
- It occurs in two stages: photoexcitation of chl-a and photolysis of water.
- In the first stage, a photon ejects an electron from a chlorophyll, which liberates oxygen and water.
- In the second stage, the freed oxygen photolyzes water to produce ATP.
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