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Photosynthesis and Cellular Respiration

Photosynthesis and Cellular Respiration. Metabolism. The total of all chemical reactions that take place in an organism. Most chemical reactions in an organism require enzymes. An enzyme is a protein that speeds up a chemical reaction . Photosynthesis.

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Photosynthesis and Cellular Respiration

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  1. PhotosynthesisandCellular Respiration

  2. Metabolism The total of all chemical reactions that take place in an organism. Most chemical reactions in an organism require enzymes. An enzyme is a protein that speeds up a chemical reaction.

  3. Photosynthesis • The process of converting light energy into chemical energy and storing that energy in the bonds of a sugar (glucose) • Producers – including plants, algae and some bacteria – are photosynthetic • Takes place in the chloroplast of a cell • carbon dioxide + water → glucose + oxygen CO2 + H2O → C6H12O6 + O2

  4. Photosynthesis Almost all living things depend on sunlight! carbon dioxide oxygen Sunlight (energy) glucose water

  5. Cellular Respiration Respiration – the process in which chemical reactions break down food molecules into simpler substances and release stored energy. There are two types of cellular respiration – aerobic and anaerobic.

  6. Anaerobic Respiration • Does not use oxygen to release energy from glucose and only generates 2 ATP. This occurs when there is no oxygen or not enough oxygen for aerobic respiration. • Occurs in both producers and consumers. • Takes place in the cytoplasm. • Products include carbon dioxide, lactic acid and alcohol.

  7. Aerobic Respiration • Uses oxygen to release energy from glucose in order to generate a maximum of 38 ATP (adenosine triphosphate) • Occurs in both producers and consumers

  8. Aerobic Respiration glucose + oxygen → carbon dioxide + water C6H12O6 + O2 → CO2 + H2O

  9. Aerobic Respiration oxygen carbon dioxide water glucose ATP (energy)

  10. Photosynthesis vs. Cellular Respiration

  11. Photosynthesis vs. Cellular Respiration glucose + oxygen ATP (energy) sunlight (energy) carbon dioxide + water

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