Final answer:
Glucose is not a polysaccharide; it is a simple sugar and a monosaccharide, whereas starch, glycogen, and cellulose are all polysaccharides composed of glucose units. so, option 1 is the correct answer.
Step-by-step explanation:
Among the carbohydrates listed — glucose, glycogen, starch, and cellulose — glucose is not a polysaccharide. Polysaccharides are long-chain polymers of monosaccharides like glucose and are used for energy storage or structural support in living organisms. Starch, glycogen, and cellulose are all polysaccharides composed of glucose units, but glucose itself is a simple sugar, specifically a monosaccharide. Glycogen, referred to as animal starch, is a highly branched polysaccharide which serves as energy storage in animals and bacteria. Plants primarily store energy in the form of starch, which is also a polysaccharide, and cellulose is another polysaccharide that acts as an important structural component of cell walls in plants.
Glucose is a monosaccharide and not a polysaccharide. It is the simple sugar that is used as the main source of energy in organisms. Glycogen and starch are polysaccharides that are used for energy storage in animals and plants, respectively. Cellulose is also a polysaccharide, but it functions as a structural component of plant cell walls.