Aerobic and anaerobic respiration are vital metabolic pathways used by living organisms to release energy.
Write the balanced chemical symbol equation for aerobic respiration.
Explain how the rate of respiration in a culture of unicellular yeast cells is affected by changes to abiotic (non-living) factors.
In a commercial hydroponic greenhouse, tomato plants are grown with their roots submerged in a liquid nutrient solution. If the aeration pumps fail, the dissolved oxygen concentration in the solution drops to near zero.
Explain how this lack of oxygen affects the respiration of root cells and how this ultimately reduces the growth of the plants.
10 exam-style questions on Edexcel IGCSE Biology Respiration. Each one has a worked solution and a mark scheme showing where the marks go.