Which of the following is a polysaccharide?

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Prepare for the WJEC Food Science and Nutrition Level 3 Test. Use multiple choice questions with instant feedback for effective study. Be confident and ready for the exam!

Multiple Choice

Which of the following is a polysaccharide?

Explanation:
Polysaccharides are long chains of sugar units linked together, forming polymers. Starch fits this definition because it is a plant storage polysaccharide made up of many glucose units joined by glycosidic bonds (primarily alpha-1,4 bonds with some alpha-1,6 branches in amylopectin). Fructose and galactose are monosaccharides, the simplest sugars that cannot form long chains on their own. Sucrose is a disaccharide, consisting of glucose and fructose linked together, not a polymer. So starch is the correct choice because it is a true polysaccharide, made of many glucose units. In foods, starch acts as a major storage carbohydrate in plants and thickens when heated due to gelatinization.

Polysaccharides are long chains of sugar units linked together, forming polymers. Starch fits this definition because it is a plant storage polysaccharide made up of many glucose units joined by glycosidic bonds (primarily alpha-1,4 bonds with some alpha-1,6 branches in amylopectin). Fructose and galactose are monosaccharides, the simplest sugars that cannot form long chains on their own. Sucrose is a disaccharide, consisting of glucose and fructose linked together, not a polymer. So starch is the correct choice because it is a true polysaccharide, made of many glucose units. In foods, starch acts as a major storage carbohydrate in plants and thickens when heated due to gelatinization.

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