BOTANY Higher Secondary Second Year - Textbooks Online

In anaerobic respiration, the respiratory substrate is not completely
oxidized to release energy. Glucose is split into two molecules of pyruvic
acid. The pyruvic acid is further converted into either ethanol or organic
acids like lactic acid. Fermentation is a good example for anaerobic
respiration.
5.3.6. Respiratory quotient
Respiratory quotient may be defined as “the ratio between the volume
of carbondioxide given out and oxygen consumed during respiration”.
This value depends upon the nature of the respiratory substrate and its rate
of oxidation.
(i) Respiratory quotient of a carbohydrate
Glucose
(ii) Respiratory quotient of an organic acid
Malic acid
(iii) Respiratory quotient of fatty acid
32
Palmitic acid Sucrose
212
(more than one)
(less than one)