AQA Biology Respiration Revision Notes

• 1Aerobic respiration requires oxygen and produces more energy than anaerobic respiration.
• 2Anaerobic respiration occurs in the absence of oxygen and results in the production of lactic acid or ethanol.
• 3Glycolysis is the first stage of both aerobic and anaerobic respiration, occurring in the cytoplasm.
• 4The Krebs cycle and oxidative phosphorylation are stages of aerobic respiration that occur in the mitochondria.
• 5Respiration is vital for ATP production, which powers cellular processes.

Respiration is how cells get energy from food. When we eat, our bodies break down glucose using oxygen to create energy, carbon dioxide, and water. If there's no oxygen, our cells can still get energy but produce less and create substances like lactic acid. This process is crucial for all living things to function.