Cellular processes are carried out by many different types of molecules, mostly proteins. the function of each protein molecule depends on its shape which, in turn, is determined by the protein's specific sequence of

The function of each protein molecule depends on its shape, which in turn is determined by the protein specific sequence of AMINO ACIDS.
Proteins are a type of macro molecules that are made from amino acids, each protein is a long chain of different amino acids. There are twenty different amino acids in existence. Protein carry out several crucial functions in the cells of living organisms. The specific functions which a protein carries out is determined by its shape and the three dimensional structure of the protein. The shape of the protein depend on the type of amino acids that made up the protein. 

The basic building blocks of dna and rna are nucleotides