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Photosynthesis and Respiration

Photosynthesis and 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 Respiration

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  1. Photosynthesisand 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. 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

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

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

  9. 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.

  10. Photosynthesis vs. Cellular Respiration

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

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