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Question 2

List the similarities and differences between aerobic and anaerobic respiration.

Answer

Similarities between Aerobic and Anaerobic Respiration

          Aerobic respiration               Anaerobic respiration
1. In aerobic respiration, energy is produced by the breakdown of food (like glucose). 1. In anaerobic respiration also energy is produced by the breakdown of food (like glucose).
2. Aerobic respiration takes place in the cells of the organism. 2. Anaerobic respiration also takes place in the cells of the organism.

Differences between Aerobic and Anaerobic Respiration

           Aerobic respiration           Anaerobic respiration
1. Aerobic respiration takes place in the presence of oxygen. 1. Anaerobic respiration takes place in the absence of oxygen.
2. Complete breakdown of food occurs in aerobic respiration. 2. Partial breakdown of food occurs.
3. The end products in aerobic respiration are carbon dioxide and water. 3. The end products in anaerobic respiration may be alcohol and carbon dioxide like in yeast, or lactic acid like in muscles.
4. Aerobic respiration produces a considerable amount of energy. 4. Much less energy is produced in anaerobic respiration.
5. Fermentation process is shown by the anaerobes in the cytoplasm. In this Glucose breaks down into ethyl alcohol and carbon dioxide without using oxygen, also known as alcoholic fermentation and lactic acid fermentation.
Alcoholic fermentation or yeast oxidization:-
C6H12O6 →   2 C2H5OH      + 2 CO2      + Energy
(Glucose)    (Ethyl alcohol) (Carbon dioxide)


5. Glucose get break down into the carbon dioxide, water and energy is released in the form of ATP is aerobic respiration. It yields more energy available in glucose.

C6H12O6 + 6O2  → 6CO2 + 6H2O + Energy
(Glucose) (Oxygen) (Carbon dioxide)   (Water) (Stored in ATP)

 

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