Photosynthesis & Cellular Respiration

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Photosynthesis & Cellular Respiration
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  • Photosynthesis & Cellular Respiration
  • Photosynthesis and cellular respiration are two life processes that complement each other.
  • Plants make their own food through a process called photosynthesis, which takes place in the chloroplasts of a plant cell.
  • This makes them autotrophs: organisms that form organic substances from inorganic substances.
  • To perform photosynthesis, sunlight must be absorbed by chlorophyll. Water and carbon dioxide move in through the stomata.
  • These reactants are then converted into oxygen and glucose, which are released from the plant through gas exchange.
  • *Cellular respiration converts stored energy into usable energy*
  • Aerobic respiration is a reaction performed by heterotrophs, organisms that cannot produce their own food.
  • Taking place in the mitochondria, oxygen and glucose are taken in and converted to carbon dioxide, water, and ATP energy.
  • When oxygen is not present, heterotrophs must rely on anaerobic respiration. It's usually used as an emergency reaction because it's less efficient, producing only 2 ATP per glucose.
  • Anaerobic respiration occurs in the cytoplasm, where energy is released from glucose during glycolysis.
  • Without photosynthesis or cellular respiration, neither autotrophs nor heterotrophs would survive.
  • How do photosynthesis and cellular respiration correlate?
  • The products of one process are the reactants of the other.
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