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Unformatted text preview: Poisons • arsenate inhibits pyruvate dehydrogenase, blocking pyruvate oxidation • cyanide inhibits a iron-containing protein in the e- transport chain, blocking e- transport - 1 -Photosynthesis Overview • Organisms need to find energy: they eat other organisms. This is not self-sustaining • Some organisms capture energy from solar radiation • Process is divided in to two steps: • Turn energy of light into ATP and reducing power (NADPH), byproduct is O2: light reac-tions, thylakoid of chloroplast • Use ATP and NADPH to convert CO2 and H2O into sugar (C fixation): dark reactions, stro-ma of chloroplast Light energy capture • Light -> Chlorophyll -> high energy e- from H2O (--> O2) • chlorophyll is inside thylakoid membrane • high energy electron outside thylakoid enters e- transport chain • two uses • pump H+, form gradient, power ATPase, make ATP • H+ is higher inside thylakoid vescicles • reduce NADP+- 2 -...
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This note was uploaded on 06/07/2009 for the course BIS BIS2A taught by Professor Lucacomai during the Spring '09 term at UC Davis.
- Spring '09