What are the different ways in which glucose is oxidised to provide energy in various organisms? Give one example of each.

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Solution

There are two ways in which glucose is oxidised to provide energy in various organisms

Aerobic respiration - Oxidation of glucose in presence of oxygen. It involves the complete oxidation of glucose into carbon dioxide and water. A considerable amount of energy (38 ATPs) is released in this process. For example - most animals and plants carry out aerobic respiration.

Anaerobic respiration - Oxidation of glucose in absence of oxygen. It may be of two types:

(a). Anaerobic respiration in yeast: The glucose is partially oxidised to form ethanol and carbon dioxide to release energy,
(b). Anaerobic respiration in muscle cells: The glucose is partially oxidised to form lactic acid and release energy.

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Q. What are the different ways in which glucose is oxidised to provide energy in various organisms? Give one example of each.

Q. What are the different ways in which glucose is oxidised to provide energy in various organisms? Explain with equations. Which of these processes provides the maximum energy?

Q. (a) Name two different ways in which glucose is oxidized to provide energy in various organisms.
(b) Write any two differences between the two ways of oxidation of glucose in organisms.

Consider the following chemical reactions which take place in different organisms/tissues under various conditions
(i) Glucose $R e s p i r a t i o n - ------ \to$ Ethanol + Carbon dioxide + Energy
(ii) Glucose $R e s p i r a t i o n - ------ \to$ Carbon dioxide + Water + Energy
(iii) Glucose $R e s p i r a t i o n - ------ \to$ Lactic acid + Energy

(a) Name one organism which respires according to equation (i)above.
(b) Name one organism which respires according to equation (ii) above.

(c) When and where does respiration represented by equation (iii) above take place?
(d) Which equation/equations represent aerobic respiration?
(e) Which equation/equations represent anaerobic respiration?
(f)Which of the above reactions produces the maximum amount of energy?

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What are the different ways in which glucose is oxidised to provide energy in various organisms?

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