Final answer:
Multiple amino acids joined by peptide bonds are referred to as polypeptides, which can ultimately form proteins through continuous addition of amino acids.
Step-by-step explanation:
Multiple amino acids connected with peptide bonds are called polypeptides.
An amide bond joining two amino acid units is referred to as a peptide bond. This bond is significant because it allows the formation of long chains of amino acids, which can continue to react with additional amino acids to create proteins.
For clarity, a single amino acid is known as a monopeptide; two linked by a peptide bond is a dipeptide. Similarly, chains of three, four, five, and beyond are called tripeptides, tetrapeptides, pentapeptides, etc., respectively. When the chain reaches a certain length of amino acids, it is typically called a polypeptide or a protein, depending on the size and complexity.