There are four main biological molecules inside living organisms: proteins, carbohydrates, lipids, and nucleic acids. Carbohydrates are polymers of the monomer, glucose. Carbohydrates are are used by humans as energy and are stored in the body as glycogen. Lipids are glycerol molecules that have three hydroxic groups on them. This allows them to form three ester bonds with fatty acid molecules, which is the basic structure of a lipid molecule. Nucleic acids are made of nucleotides, which are adenine, thymine, cytosine, and guanine, the things that make up DNA molecules. Proteins are made of different variations of 20 amino acids to form an endless amount of combinations. Each protein has a different combination, making the end of the protein unique, which allows it to attach to receptors in your body. Proteins can range from antibodies to transporters Various chains of protein can have various amounts of amino acids. Proteins are arguably one of the most essential parts of living organisms.
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