DEFINITIONS AND KEY POINTS FOR Respiration

TERMS DEFINITIONS
Respiration The series of oxidation reduction reactions in which substances (glucose) are oxidized to carbon dioxide

and   oxygen  and   energy  is  releasedis   called
respiration.

Aerobic respiration Aerobic respiration takes place in the presence of free oxygen. It includes Krebs cycle and electron transport chain.
‘Anaerobic respiration Anaerobic respiration takes place in the absence of free oxygen. This process is called fermentation.
Krebs cycle Krebs cycle is a series of reactions in which the pyruvate from glycolysis is oxidized to CO,.
Electron

transport chain

The collection of electron carrier molecules embedded in the inner membrane of the mitochondrion is called electron transport chain.
oxidative


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phosphorylation

the synthesis of ATP molecule in the presence of oxygen is called oxidative phosphorylation.
Chemiosmosis The coupling reaction in which synthesis of ATP molecule takes during movement of H ‘ across an 11. gradient is called Chemiosmosis.
Respiratory substrate The organic substances of the cells used up in the respiratory process arc called respiratory substrate.
Respiratory quotient

The ratio of the volume of carbon dioxide give out to the volume of oxygen absorbed (C0702) is
called the respiratory quotient.

 

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