Photosynthesis:
- photosynthesis transfers electrons from water to energy-poor carbon dioxide molecules, forming energy rich sugar molecules
- This electron transfer is an example of an oxidation-reduction process: the water is oxidized (loses electrons) and the CO2 is reduced (gains electrons)
- Photosynthesis, the process by which green plants and certain other organisms transform light energy into chemical energy . During photosynthesis in green plants, light energy is captured and used to convert water, Carbon dioxide and minerals into oxygen and energy-rich organic compound
- In PSII, ( 680nm) the electrons are removed from water molecules to create oxygen and protons. These protons are then directed through Photosystem I (PSI) to create carbohydrates from carbon dioxide
Cellular Respiration:
- Starting with 6 carbon sugar, glycolysis produces two 3 -carbon pyruvate molecules
- glycolysis does not require oxygen
- All the reactions in glycolysis occurs in the Cytoplasm, each step is catalyzed by a specific enzyme
- Krebs cycle begins after the two molecules of the three carbon sugar produced in glycolysis are converted to acetyl CoA
- ETC (electron transport chain) requires oxygen directly
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