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Answer the following questions briefly: (i) What are reducing sugars? (ii) What is meant by denaturation of a protein? (iii) How is oxygen replenished in our atmosphere? |
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Answer» Solution :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. (ii) 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. (iii) We take oxygen ATMOSPHERE and RELEASE `CO_(2)`. Plants take up `CO_(2) and H_(2)O` from the atmosphere to prepare their food in the presence of sunlight and release `O_(2)`, THUS `O_(2)` is replenished in atmosphere. |
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