DEFINITIONS AND KEY POINTS FOR Respiration

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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 ---------------------------- ---------------------------- 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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