... are the simple sugars or monosaccharides. The most important is glucose. They are an important source of energy for plants, animals and humans. Proteins are polymers constructed of 20 different amino acids which in turn are composed of carbon, hydrogen, oxygen, nitrogen and sometimes sulfur and are combined in ways to form the protein molecules an organism needs. They form the ... carries oxygen to cells. Other protein in the cells use the oxygen to break down the sugar glucose to create the energy the body needs. Proteins also form important bodily structures, they are the important pa...

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• Grade Level: Undergraduate