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Glucose is a monosaccharide (the simplest type of carbohydrate), whereas starch is a polysaccharide. Starch consists of many chains of glucose.
A carbohydrate is an organic compound with the basic formula of CH2O, where there are twice as many hydrogen to oxygen atoms in the formula. Another term for carbohydrate is saccharide. Glucose, is a monosaccharide which has a lower molecular weight than starch, a polysaccharide. This is because many glucose molecules can be joined one to the other, by a process of dehydration synthesis, to form a larger molecule of starch, a polysaccharide. Where the prefix mono means single, the prefix poly refers to many. Glucose cannot be hydrolyzed to smaller carbohydrates. The formula for glucose is C6H12o6, and it is used as fuel by living things. The polysaccharide starch, which is a polymer of glucose is a plant storage molecule. In animals, excess glucose is converted to glycogen, or "animal starch" and can be stored in the liver and muscle cells.
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