Barber Practice State Board Practice Exam

What structure is formed when amino acids are joined together by end bonds?

1. Polypeptide Chain

2. Amino Chain

3. Protein Structure

4. Enzymatic Chain

The correct answer is: Polypeptide Chain

When amino acids are joined together by end bonds, they form a polypeptide chain. This is a fundamental aspect of protein chemistry. Polypeptides are long chains made up of amino acids linked by peptide bonds, which are a specific type of end bond formed between the carboxyl group of one amino acid and the amino group of another. The sequence and arrangement of these amino acids determine the characteristics and functions of the resulting protein. Polypeptide chains can fold and coil into specific shapes, leading to the complex three-dimensional structures that proteins exhibit, which are crucial for their biological functions. While the other options refer to related concepts in protein biology, they do not accurately describe the immediate structure formed from the joining of amino acids by end bonds. For instance, while a protein structure is the final functional configuration of one or more polypeptides, it is not the direct result of amino acid bonding in the initial stages. Similarly, the terms "amino chain" and "enzymatic chain" are not standard terminology used in biochemistry to describe the process of amino acids linking together through end bonds.