Carbohydrate: Main energy source, Monosaccharides, Starch and glycogen, sugars and starches, , Lipids: energy storage, structure (cell membrane), function (hormones), Fatty Acids, adrenaline and testosterone, , Proteins: energy storage, structure (hair, nails, cartilage, muscle) and function (enzymes), Amino Acids, Lactase and amylase, , Nucleic Acid: hold genetic information, Nucleotides, DNA and RNA, ,

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