Question

31. Name the type of respiration in which the end products are:
(a) C2H5OH and CO2
(b) CO2 and H2O
(c) Lactic acid
Give one example of each case where such a respiration can occur.
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Answer 1

Answer:

a- anaerobic respiration e.g bacteria

b-aerobic respiration e.g human

c-anarobic respiration e.g muscle cell

Answer 2

(a) C2H5OH and CO2

• This is an anaerobic respiration , since it doesn't use oxygen for respiration.

• The process here is called alcoholic fermentation.

• The organism responsible for conversion is yeast.

• Yeast converts respiratory product , glucose into ethanol or ethyl alcohol and carbon dioxide i the absence of oxygen.

• This type of respiration occurs in case of baking of bread and brewing industry.

• The holes in the bread are due to the bubbles formed by carbon dioxide.

(b) CO2 and H2O

• This is an aerobic respiration , since it uses oxygen for the breakdown of glucose.

• Here the respiratory product ,glucose is breakdown into carbon dioxide and water.

• Aerobic respiration releases large amount of energy than anaerobic respiration.

• This type of respiration takes place in all cells of human.

(c) Lactic acid

• This is an anaerobic respiration ,since it doesn't use oxygen.

• In human muscle cells, this type of respiration occurs during sternous exercise.

• This type of respiration is called lactic acid respiration

• In curdling of milk , the lactic acid bacteria converts milk to curd .

• In this process , the lactose is used by the bacteria to produce ATP.

• As a result ,lactic acid is produced.