KEY TAKEAWAYS •
There are four types of biomolecules, including carbohydrates, proteins, lipids, and nucleic acids.
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Lipids can be simple fatty acids, phospholipids, and sterols, which have somewhat different properties.
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Peptides and proteins are made from combinations of amino acids. They have different structural features depending on what amino acids are in the peptide chain.
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The major polysaccharides in nature are glycogen, starch, and cellulose.
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Polysaccharides and disaccharides are made from glycosidic linkages between certain carbohydrate monomers.
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Biochemical techniques can be used to identify pathogens according to different characteristics inside the cell or on the cell membrane itself.
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