Exam questions

• How cells use the energy from respiration


  • To combine small molecules to make larger molecules
  • To break large molecules into smaller molecules
  • For muscle contraction
  • To maintain our body temperature
  • To move substances around the cell
• Reasons animals cells prefer aerobic respiration to anaerobic respiration


  • Anaerobic respiration doesn't break down the glucose molecule completely, and so releases less energy than aerobic respiration
  • Anaerobic respiration produces lactic acid which can damage cells and leads to an oxygen debt