Well biochemistry is the study of the chemistry that makes life work – from the metabolism to make energy, all the way through to the chemical that store information in your cell (DNA) and how this information is used. It involves the study of proteins, lipids and carbohydrates – and altough lots of it is carbon chemistry there are metal ions and such too.
It looks at all organisms from viruses and bacteria to plants and us! but generally it only considers what is going on at the small level in terms of molecules and chemistry
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