A Level Biology Practice Exam

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What are polysaccharides made of?

Multiple amino acids linked together
A single sugar monomer
Many sugar monomers (monosaccharides)
Only fatty acids linked together

The correct answer is: Many sugar monomers (monosaccharides)

Polysaccharides are indeed made up of many sugar monomers, which are also known as monosaccharides. These long chains of monosaccharides are held together by glycosidic bonds formed through dehydration synthesis. Common examples of polysaccharides include starch, glycogen, and cellulose, each consisting of different types and arrangements of glucose molecules. The structural variations among polysaccharides play key roles in their biological functions, such as energy storage and providing structural support in plant cell walls. Understanding that polysaccharides are composed of multiple linked monosaccharides is essential in the study of carbohydrates and their diverse roles in living organisms.