Question

List (in order)/describe the 5 levels of coupling.

Answer 1

Proteins have four levels of organization: primary, secondary, tertiary, and quaternary. These levels describe the linear sequence of amino acids, the folding of the protein chain, the overall 3D shape, and the arrangement of multiple subunits. Protein structure and function are intertwined, as the structure of a protein determines its specific function.

Step-by-step explanation:

1. Primary structure: The linear sequence of amino acids in a protein.
2. Secondary structure: The folding of the protein chain into repeating patterns, such as alpha helices and beta sheets.
3. Tertiary structure: The overall 3D shape of the protein, formed by interactions between amino acid side chains.
4. Quaternary structure: The arrangement of multiple protein subunits into a functional protein complex.

Protein structure and function are closely linked. The unique structure of a protein determines its specific function. For example, enzymes have an active site with a shape that fits the substrate, allowing them to catalyze specific chemical reactions.