Proteins and Carbohydrates are different because proteins are nutrients that help build and repair your cells. Proteins are any kind of meat and milk Ex. pork, liver, milk, and beans. Carbohydrates are sugars and starches. Ex. bread, milk, corn and other different things.
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Proteins and Carbohydrates both provide the cells in our bodies with structural support and are made of small structures called monomers, which are very small molecules. They are both major macromolecules important to understanding cells in Biology. Both Proteins and Carbohydrates also have Carbon based backbones.