Year 9 IGCSE biology
There are 5 main nutritions - carbohydrates, protein, fat, vitamins, and minerals
Each nutrition have different roles in body
They do most of the work in cells and are required for the structure, function, and regulation of the body's tissues and organs. Proteins are made up of hundreds or thousands of smaller units called amino acids, which are attached to one another in long chain.
The roles of carbohydrate in the body includes providing energy for working muscles, providing fuel for the central nervous system, enabling fat metabolism, and preventing protein from being used as energy.