biology - bioenergetics.

• Limiting factors of photosynthesis


  • CO2
  • Temperature
  • Light intensity
  • Amount of chlorophyll
• Uses of glucose from photosynthesis


  1. Release energy in respiration

  2. Produce starch

  3. Convert to fats

  4. Produce cellulose

  5. Make amino acids to synthesise proteins
• What is Anaerobic respiration and why does it happen?

  • Occurs when there is insufficient oxygen
  • Releases less energy than aerobic respiration
  • Oxidation of glucose is incomplete
• What is Metabolism?

  The sum of all chemical reactions in the body
• Anaerobic respiration in yeast?


  Glucose > ethanol + carbon dioxide
• What is Lipid synthesis?

  1 glycerol molecule + 3 fatty acid molecules
• What happens during exercise?


  1. Aerobic respiration increases

  2. Body cells need more oxygen

  3. (so) Breathing rate and volume increase

  4. (so) More oxygen into bloodstream

  5. Heart rate increases to pump oxygenated blood around body
• Oxygen debt


  The extra oxygen your body needs to deal with accumulated lactic acid
• Anaerobic respiration in muscle?

  glucose > lactic acid