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How is ‘respiration’ different from ‘breathing’? Explain the processes of ‘aerobic’ respiration and ‘anaerobic’ respiration.



Breathing is the process by which oxygen is taken in (inhalation) and carbon dioxide is released out (exhalation). Respiration involves the oxidation of the food we eat to release energy. Carbon dioxide produced as a result of this is released out during exhalation. Aerobic respiration: During aerobic respiration, the oxidation of food takes place in the presence of oxygen. Aerobic respiration can be summarised by the given equation:
C6H12O6 + 6O2   ---------> 6CO2 + 6H2O + 2900 kJ/mol
Anaerobic respiration: During anaerobic respiration, food is broken down in the absence of oxygen. It is also known as fermentation and is more common in microorganisms such as yeast. Sometimes pyruvate gets converted into lactic acid in muscles by the process of anaerobic respiration.
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