bio - bioenergetics

• Glucose in plants is used for:

  • respiration
  • cellulose
  • make amino acid
  • move minerals into plants via active transport
• Aerobic respiration produces more energy in humans than anaerobic respiration =

  aerobic respiration is a complete oxidisation of glucose whereas anaerobic respiration is incomplete
• The breathing rate and volume of each breath increases to bring more oxygen into the body and remove the carbon dioxide produced
• Properties of aerobic respiration:

  • Needs oxyagen
  • Oxygen + glucose --> CO2 + water
  • Releases large amounts of energy
  • Used for low intensity excersise
  • Provides energy over long period of time

  (marathon)
• describe process of photosynthesis

  process where green plants and algae use sunlight to covert carbon dioxide and water into glucose and oxygen
• how does light intensity affect rate of photosynthesis

  increasing light intensity increases rate of photosynthesis until another factor becomes limiting
• what happens during aerobic respiration

  aerobic respiration uses oxygen to break down glucose, releasing energy, water and carbon dioxide
• whys chlorophyll important in photosynthesis

  chlorophyll absorbs light energy which is required for photosynthesis
• how does temperature affect photosynthesis

  higher temperatures increase enzyme activity up to an optimum
• photosynthesis equation:

  carbon dioxide + water --> glucose + oxygen
• endothermic reaction =

  when sunlight is absorbed in plants
• whys glucose stored as starch in plants

  its used as an insoluble to prevent unexpected loss of glucose
• how do you test for starch in plants

  use iodine solution and watch the brown/orange colour change to blue/black
• anaerobic respiration in plants:

  glucose --> carbon dioxide + ethanol
• anaerobic respiration in humans:

  glucose --> lactic acid