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Photosynthesis and Cellular Respiration

Photosynthesis and Cellular Respiration. Chap.6&7. Final points on photosynthesis. It is done by autotrophs . (plants)

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Photosynthesis and Cellular Respiration

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  1. Photosynthesis and Cellular Respiration Chap.6&7

  2. Final points on photosynthesis • It is done by autotrophs. (plants) • It starts with light reactions that occur in photosystem one and two in which sunlight is captured, absorbed, synthesized into ATP through the process of chemiosis. (chloroplast) • Then the Calvin cycle fixates carbon. ( breaks CO2 apart so it can be made into sugar) • At night, plants break down the stored sugar for energy by cellular respiration. (mitochondria)

  3. Relationship between photosynthesis and Cellular Respiration • cellular respiration is essentially the reverse reaction of photosynthesis. • The formula for photosynthesis is 6 H2O + 6 CO2 + light energy ----------> C6 H12 O6 + 6 O2 and the formula for cellular respiration is C6 H12 O6 + 6 02 ----------> 6 H2O+ 6 CO2+ energy • From the formulas here, you can see that the products of photosynthesis fuel cellular respiration and the products of cellular respiration fuel photosynthesis. • Photosynthesis uses energy from sunlight to build glucose and release oxygen from carbon dioxide and water. Cellular respiration combines oxygen with glucose in the mitochondria to produce ATP; water (along with a little heat) and carbon dioxide are produced as well. • (wikipedia.com)

  4. Cellular Respiration • Done by autotrophs and heterotrophs. • Makes ATP. Some ATP is used by the cell to function. • Is a continuous cycle in heterotrophs but happens only at night in autotrophs.

  5. Stages of Cellular Respiration • Begins with glycolysis (breaking down of glucose into smaller carbon chains) in the cytoplasm of a cell. -

  6. Anaerobic Respiration • If no O2 is present then two types of fermentation can occur: Lactic Acid fermentation (animal cells) Alcoholic fermentation (yeast and plant cells)

  7. Lactic Acid Fermentation • Causes muscle soreness or cramps.

  8. Alcoholic Fermentation • No O2 is used to make this:

  9. Krebs Cycle

  10. Aerobic Respiration • - If O2 is present - Aerobic respiration takes place during the Krebs cycle. This is done in the “power house” of the cell known as the mitochondrion.

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