2023 paper

• explain why there is a greater ratio of wound infections in open surgery compared to key hole(2)

  • larger area open for bacteria/pathogens to enter and cause infection
• describe what would happen to pyruvate if the link reaction stopped(2)

  • it would be used in anaerobic respiration
  • reduced NAD provides hydrogen
  • it is reduced/converted to lactate
• explain why the coloured liquid moves to the left in a respirator investigation(2)

  • the organisms respiring aerobically so therefore is taking in oxygen
  • this decreases the pressure pulling the liquid left