B4- bioenergetics

• 5 uses of glucose

  Respiration

  make fat for warmth

  produce cellulose to strengthen cell walls

  combine with nitrates to make amino acids

  converted to starch for storage
• 4 limiting factors of photosynthesis

  Light intensity

  co2 concentration

  temperature

  chlorophyll concentration
• Why is knowledge of Limiting factors useful 


  Helps growers to keep best conditions of greenhouses to maximise growth rate and maintain profit
• Use of energy from aerobic respiration 


  Chemical reactions that build up large molecules

  movement

  active transport
• Equation of anaerobic respiration in animals and plants

  Glucose-> lactic acid

  glucose-> ethanol + co2
• Why is there less energy made in anaerobic respiration

  oxidation of glucose is incomplete
• Bodies réponse to exercise

  Breathing rate increase

  heart rate increases more oxygenated blood to muscles
• What is converted into glucose

  Glycogen
• Where does blood transport lactic acid and why

  Liver to be converted into glucose
• What is oxygen debt


  Amount oxygen extra needed to react with lactic acid to remove
• What is metabolism


  Sum Of all reactions in a cell or the body
• What is glucose used for in plants

  Converted into starch

  converted into cellulose

  glucose combine with nitrate ions to form amino acids
• How are excess amino acids removed from body

  Broken down to form urea and excreted in urine
• 4 examples of metabolic reactions 


  respiration

  photosynthesis

  glucose to starch

  glucose + nitrate ions to amino acids
• RPA what apparatus can you use to collect bubbles

  Potometer
• What is the inverse square law


  Light intesity inversely 1/distance squared
• What happens when you double distance beaker from light source

  Bubbles fall by factor of 4
• RPA- problems

  Bubbles hard to count

  not all bubbles same size