Why do proteins have to have a 3d shape in order to function properly?

Protein is made up of a sequence of amino acids. The shape of the protein is usually characterize by the sequence of amino acids present. The functionality of protein is based on its shape. The shape of the protein can be a primary, secondary and tertiary. Tertiary structure of the protein allows it to interact or bind with other molecule in a specific way to perform a specific task.

is prokaryotic, one celled organisms, and can be both harmful and good to the body