Types of Respiration
Respiration
is classified into two types as aerobic and anaerobic respiration (Figure 14.4)
Respiration
occurring in the presence of oxygen is called aerobic respiration. During aerobic respiration, food materials
like carbohydrates, fats and proteins are completely oxidised into CO2,
H2O and energy is released. Aerobic respiration is a very complex
process and is completed in four major steps:
1.
Glycolysis
2.
Pyruvate oxidation (Link reaction)
3.
Krebs cycle (TCA cycle)
4.
Electron Transport Chain (Terminal oxidation).
In the
absence of molecular oxygen glucose is incompletely degraded into either ethyl
alcohol or lactic acid (Table 14.1). It includes two steps:
1.
Glycolysis
2.
Fermentation
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