what is the bond called that connects amino acids into peptides
The bond is called a peptide bond. During translation, messenger RNA is translated into proteins in the ribosomes by transfer RNA molecules. The transfer RNA molecule have amino acids attached to its molecule. Each animo acid has its own codon, or three nucleotide sequence. The anticodon (complementary bases to the codon) on the transfer RNA are attach to the codon on the messenger RNA sequence. This verifies whether or not transfer RNA has the correct amino acid. The amino acids are attached by peptide bonds which are covalent bonds (very strong).
Amino acids subunits are connected by a peptide bond between the carboxyl group and chain of amino acids connected by peptide bonds is called a polypeptide chain.