Genes contain the coded formula needed by the cell to produce proteins. Proteins are the most common of the complex molecules in your body. Types of proteins include:
structural proteins, such as those which form hair, skin and muscle
messenger proteins, such as hormones, which travel around your body controlling such things as the sugar content of your blood
enzymes, which carry out most of the life processes inside your body, for example making haemoglobin for your red blood cells.
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