Some sugar solution is taken in a test-tube and a little of substance X in powder form is added to it. The mouth of test - tube is closed with a cork and allowed to stand for sometime. On opening the cork, a characteristic smell of substance Y is obtained and a gas Z is also observed to be formed. The gas Z extinguishes a burning matchstick.
What could be X, Y and Z?
What is the process of converting sugar into substance Y by the action of X known as?
What type of respiration is exhibited by X in the above process?
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X is yeast.
Y is ethanol.
Z is carbon-dioxide.
Fermentation is the process of converting sugar into substance Y by the action of X.
Anaerobic respiration is exhibited by X in the above process.
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Name the main organs of the human digestive system in the order they participate in the process of digestion. Describe how digestion of carbohydrates and proteins take place in our body.