Chapters 1 to 6
Chapters 7 to 12
Transport in Plant
Chapters 13 to 17
Chapters 18 to 22
11 Bio Chapter Summary
The complete combustion of glucose yields energy during
. Most of the energy produced during respiration is given out as heat. CO
O are the end products of respiration.
Respiration happens in two main steps in all living beings, viz.
glycolysis and processing of pyruvate.
involves breaking down glucose into pyruvate. This is common in all living beings.
, pyruvate is further processed to produce either lactic acid or ethyl alcohol. There is incomplete oxidation of glucose in anaerobic respiration.
, pyruvate is further processed to produce carbon dioxide and water; alongwith energy. There is complete oxidation of glucose in case of aerobic respiration.
respiratory balance sheet
gives theoretical value about net gain of ATP for every glucose molecule oxidized.
Respiratory process involves both catabolism and anabolism; because breakdown and synthesis of substrates are involved. Hence, respiratory pathway is considered as an
rather than a catabolic one.
The ratio of the volume of CO
evolved to the volume of O
consumed during respiration is called the
respiratory quotient (RQ)
or respiratory ratio. The RQ for carbohydrates is 1. The RQ for fat and protein is less than 1.
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