What functional group pairing allows amino acids to bond tog

What functional group pairing allows amino acids to bond together to form polypeptides? bonding of amine group to acid group bonding of amine group to R group bonding of amine group to amine group bonding of acid group to acid group

Bonding of amine group to acid group.

CONH bond is called amide bond which was formed by reaction ( condensation ) of acid group and amine group which inturn releases water.