Question : Pectin, which is responsible for the firmness and softness of fruits is mainly composed of which acid unit?
Option 1: Aspartic acid
Option 2: D-Galacturonic acid
Option 3: Lactic acid
Option 4: Glutamic acid
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Correct Answer: D-Galacturonic acid
Solution : The correct option is D-galacturonic acid.
Pectin, a complex carbohydrate found in the cell walls of plants, is primarily composed of galacturonic acid units. These units are linked together to form a polymer. Pectin is a common ingredient in food processing, especially when producing jams, jellies and other preserves. It gives fruits their gel-like consistency.
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