Photosynthesis

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Photosynthesis Notes for HS Biology

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Photosynthesis

  1. 1. Photosynthesis
  2. 2. Uses light energy to make food (glucose) in plants Equation for Photosynthesis 6CO 2 + 6H 2 O + Sunlight C 6 H 12 O 6 + 6O2 Carbon dioxide + water + sunlight glucose + oxygen
  3. 3. <ul><li>Occurs in green leaves </li></ul>-The leaves have cells that contain Chloroplasts -Chloroplasts contain a green pigment called chlorophyll Chlorophyll has the ability to change light energy into chemical bond energy Chlorophyll absorbs red and blue light and reflects green light. chloroplast
  4. 5. Chlorophyll – pigment in chloroplasts <ul><li>Two types: chlorophyll a and chlorophyll b </li></ul><ul><li>Absorb red and blue light </li></ul><ul><li>Reflect Green light </li></ul><ul><li>Having both a & b enable plants to absorb light from a wider region of the spectrum </li></ul><ul><li>What color light would be best for plants to grow in? </li></ul><ul><li>Red & Blue </li></ul>
  5. 6. Photosynthesis only occurs in the light. Provides most of the oxygen in our atmosphere. The rate of photosynthesis depends on: Temperature ( ENZYMES ) Light Intensity Amount of CO 2 available Amount of Water available
  6. 7. Photosynthesis is the opposite of cellular respiration <ul><li>Photosynthesis </li></ul><ul><li>Occurs in Chloroplasts </li></ul><ul><li>Energy Storage </li></ul><ul><li>Uses: CO 2 + H 2 O + light energy </li></ul><ul><li>Makes: C 6 H 12 O 6 (glucose) + O 2 </li></ul><ul><li>Aerobic Respiration </li></ul><ul><li>Occurs in Mitochondria </li></ul><ul><li>Energy Release </li></ul><ul><li>Uses: C 6 H 12 O 6 (glucose) + O 2 </li></ul><ul><li>Makes: CO 2 + H 2 O+ chemical energy (ATP) </li></ul>
  7. 8. Cellular Respiration

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