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science

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  • No I haven't, what's that?
  • Hey, have you heard of photosynthesis?
  • Ok.
  • Photosynthesis is the process plants go through to convert water, carbon dioxide, and sunlight into food and oxygen.  Let me show you.
  • The equation for photosynthesis is 6CO2 + 6H2O + light energy = C6H12O6 + 6O2. Plants absorb light energy through a plastid called chloroplasts in their cells, photosynthesis occurs in the chloroplast.
  • I'm still confused.
  • See these flowers and the grass and trees? They're going through photosynthesis.  Photosynthesis is affected by light intensity, carbon dioxide concentration and temperature.
  • Plants have tiny openings called stomata. These openings allow plants to exchange gases necessary for photosynthesis. In the chloroplast, there is a colorless fluid called stroma that surrounds the grana.
  • That makes a little more sense.
  • Within the chloroplast there is chlorophyll, a green pigment which makes plants green and converts sunlight into energy via photosynthesis
  • Also in the chloroplast, there are a bunch of tiny sac-like membranes called thylakoids that is the site for light reactions of photosynthesis. Stacks of them are referred to as granum.
  • Mhm.
  • Within the chloroplast there is chlorophyll, a green pigment which makes plants green and converts sunlight into energy via photosynthesis.
  • ATP is a high-energy molecule found in every cell, it stores and supplies the cell with needed energy. NADH transports electrons to the mitochondria.  NADP+ is the electron acceptor of the light reactions.  ADP+ is converted to ATP for the storage of energy during cell metabolism.
  • Oh okay.
  • The light-dependent reaction takes place on the thylakoid membranes of the chloroplast and converts sunlight into chemical energy. Light-independent reactions occur in the stroma and convert carbon dioxide and other compounds into glucose. 
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