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Describe the different roles of macromolecules in biology and giving examples. There are four types of macromolecules that I am going to describe: Proteins, carbohydrates, lipids and nucleic acid. I will also describe the functions and why they are important in our bodies. Proteins Proteins are polymers of amino acids that are joined head-to-tail in a long chain that is then folded into a three-dimensional structure unique to each type of protein. The covalent linkage between two adjacent amino acids in a protein (or polypeptide) chain is called a peptide bond. There are twenty amino acids that make up proteins. Each amino acid has a typical generic structure as depicted in the diagram 1, the only variance in each amino acid lies in a unique side chain (R group). Diagram 1: Most of the amino acids have a carboxyl group and an amino group as shown above. At physiological pH the natural amino acids...

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