1.

Answer the following questions briefly. 1. What are reducing sugars? 2. What is meant by denatu ration of a protein? 3. How is oxygen replenished in our atmosphere?

Answer»

1. Reducing sugar:

All those carbohydrates which reduce Fehling’s solution and Tollens’ reagent are referred to as reducing sugars. All monosaccharides whether aldose or ketose are reducing sugars.

2. Denaturation of a protein:

When 2° and 3° structure of a protein is destroyed due to the physical changes like temperature, change in pH, it is called denaturation of a protein. Example: Coagulation of egg white on boiling.

3. We take oxygen from atmosphere and release CO2 . Plants take up CO2 and H2O from the atmosphere to prepare their food in the presence of sunlight and release O2 thus O2 is replenished in atmosphere.



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