(a) Aerobic respiration and Anaerobic respiration
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Aerobic respiration |
Anaerobic respiration |
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It uses oxygen for deriving energy. |
1. |
It occurs in the absence of oxygen. |
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It occurs in cytoplasm and mitochondria. |
2. |
It occurs in cytoplasm. |
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The end products of aerobic respiration are carbon dioxide and water. |
3. |
The end products of fermentation are ethyl alcohol and carbon-dioxide. |
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Complete oxidation of respiratory substrate takes place. |
4. |
Incomplete oxidation of respiratory substrate takes place. |
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36-38 ATP molecules are produced. |
5. |
Only 2 ATP molecules are produced. |
(b) Glycolysis and Fermentation
|
Glycolysis |
Fermentation |
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Glycolysis occurs during aerobic and anaerobic respiration. |
1. |
Fermentation is a type of anaerobic respiration. |
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Pyruvic acid is produced as its end product. |
2. |
Ethanol or lactic acid is produced as its end product. |
(c) Glycolysis and citric acid cycle
|
Glycolysis |
Citric acid cycle (Krebs cycle) |
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It is a linear pathway. |
1. |
It is a cyclic pathway. |
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It occurs in the cell cytoplasm. |
2. |
It occurs in the mitochondrial matrix. |
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It occurs in both aerobic and anaerobic respiration. |
3. |
It occurs in aerobic respiration. |
|
One glucose molecule breaks down to generate 2 NADH2 and 2 ATP molecules. |
4. |
It produces 6 NADH2, 2 FADH2, and 2 ATP molecules on breakdown of two acetyl-coA molecules. |
