The different shapes and functions of different proteins are determined by

The different shapes and functions of different proteins are determined by THE R GROUPS OF THE AMINO ACIDS THEY CONTAIN.

Explanation:

Amino acids are organic compounds which have an amino group and a carboxyl group. They are categorised by the presence of functional group, R.

The R group gives the properties such as shapes size, polarity, pH and function for each each amino acid.

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