If one amino acid in a protein sequence is changed, what could happen?

A. It could become a carbohydrate.

B. Normal bodily functions can change.

C. Proteins are so complex that one amino acid won't make a difference.

The correct response would be C. Proteins are so complex that a change in one amino acid won't make a big difference.

The primary structure of a prot is decided by sequences of amino acids.

The amino acids are sequenced in a linear polypeptide chain which folds as it is being produced.

it is this three - dimensional folded structure that decides the proteins biological activity.

The amino acids in the chain are linked together by a condensation reaction.

This reaction occurs between an amino and carboxylic acid functional group.

There is always a free amino group at the left hand end of the chain and a free carboxylic acid group at the right, these are known respectively as the N - terminus and the C - terminus. These two free functional groups react together and remove one molecule of water. The resulting link is called a peptide bond