I Know why the caged bird sings
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Carbohydrates are organic compounds that contain equal amounts of carbon and oxygen atoms, and twice as many hydrogen atoms.
Simple carbohydrates called monosaccharides are made of a single sugar molecule.
Glucose and fructose are monosaccharides.
Disaccharides, such as sucrose and lactose, are simple carbohydrates made of two monosaccharides bonded together.
Simple carbohydrates are a source of energy for living things.
Glucose is the main carboyhdrate that living things break down and convert into usable energy.
Key Concepts in Complex Carbohydrates
Complex carbohydrates, or polysaccharides, are many monosaccharides bonded together.
Starch is a common polysaccharide that consists of many glucose molecules. It has a branching structure.
Plants store extra glucose in the form of starch. Animals and plants break down starch into glucose to use as an energy source.
Plants use complex carbohydrates for energy storage and to build structures.
Cellulose is a complex carbohydrate made of many glucose molecules. It forms the cell walls that give plants shape and support.
Glycogen is a complex carbohydrate that animals use to store extra glucose. Molecules of glycogen are more highly branched than starch molecules.
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