What are the differences between aerobic and anaerobic respiration? Name some organisms that use the anaerobic mode of respiration.
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Aerobic respiration |
Anaerobic respiration |
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1. Aerobic respiration takes place in the presence of free oxygen. |
1. It takes place in the absence of oxygen. |
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2. In aerobic respiration complete oxidation of glucose takes place. |
2. In anaerobic respiration the glucose molecule is incompletely broken down. |
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3. End products of aerobic respiration are CO2, water and energy. |
3. End product of anaerobic respiration are ethyl alcohol (or lactic acid) CO2 and a little energy. |
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4. Large amount of energy is released i.e., 38 molecules of ATP per glucose molecule. |
4. Small amount of energy is released i.e., 2 ATP molecules per glucose molecule. |
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5. First step of aerobic respiration (glycolysis) takes place in cytoplasm while second (Kreb’s cycle) and third (Electron transport chain) steps take place in mitochondria. |
5. Complete anaerobic respiration occurs in cytoplasm. |
Organisms which use anaerobic respiration are yeasts, bacteria and parasites like tape worm (Taemia), Ascaris etc.
