Oxygen required for terminal oxidation enters mitochondria as
A
Glucose
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B
Activated acetic group
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C
Oxygen gas
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D
Pyruvic acid
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Solution
The correct option is C Oxygen gas The terminal oxidation which takes place inside mitochondria involves the reduction of oxygen which has entered mitochondria in the form of gas inhales during breathing. This oxygen is reduced to water by transferring electrons from cyt a3 and 2H+ from the medium. The reaction occurs in the presence of enzyme cytochrome oxidase.