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824  Explain the photophosphorylation in terms of chemiosmosis

Page history last edited by reimerkylie12@gsiscommunity.sc.kr 10 years, 6 months ago

 

Go to 3.8 Assessment statements

 

Photophosphorylation with in a plant cell occurs in the thylakoid of the chloroplast, when H+ protons pass through the CF1 particle and their energy is used to bond inorganic phosphate with an ADP molecule. Reducing the ADP and forming ATP. This begins when pigment 680 absorbs energy from the suns light and passes it on to an electron. This electron is so energized that it breaks away from pigment 680 and travels down an electron transport change. The sudden loss of energy cause by the missing electron causes pigment 680 to oxidize water and absorb 2 electrons. The water, minus it's electrons is left as two hydrogen protons and half an oxygen molecule. The Oxygen is secreted as waste but the H+ protons remain with in the thylakoid. The concentration of H+ protons increases creating a concentration gradient in which the thylakoid as a higher concentration of H+ protons and the stroma has a low concentration of H+ ions. The H+ protons then flow by facilitated diffusion through the CF1 particle and their energy is used to bond inorganic phosphate with an ADP molecule. Reducing the ADP and forming ATP. This last step is known as photophosphorylation. For more information go to ____.

http://access.mmhs.ca/docs/Science/MMHS%20Web%20Folder/Kamla/KReid%20Web%20page.htm

 

 

Comments (1)

jeonelizabeth12@gsiscommunity.kr said

at 8:32 pm on Mar 16, 2011

Kylie; I think this page has really good information. Yet, wouldn't it much better if it is organized in bullet points?
Also, I think the diagram is kinda... cut. Woudln't http://upload.wikimedia.org/wikipedia/commons/1/18/Thylakoid_membrane.png better for this topic??
Thanks :)

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