The processes of aerobic respiration in mitochondria of a cell and anaerobic respiration in yeast and muscle with the help of word equations is shown as follows-

Aerobic Respiration in Mitochondria of a cell:

The final product of glycolysis which is pyruvate is transported from the cytoplasm into the mitochondria where the aerobic respiration takes place.

• There is a complete oxidation of pyruvate by removal of all the hydrogen atoms liberating three molecules of CO₂.

• The electrons are passed to molecular O₂ with synthesis of ATP.

Pyruvate, undergoes oxidative decarboxylation with the help of enzyme, pyruvic dehydrogenase.

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Anaerobic respiration in yeast:

In yeast, there is an incomplete oxidation of glucose under anaerobic conditions where pyruvic acid is converted to CO₂ and ethanol with help of enzymes pyruvic acid decarboxylase and alcohol dehydrogenase.

Anaerobic respiration in muscle:

In the muscle cells, pyruvic acid is reduced to lactic acid by lactate dehydrogenase.

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