In protein biochemistry, the specific linear amino acid sequence of a protein is its:

• A. Quaternary structure
• B. Primary structure
• C. Tertiary structure
• D. Secondary structure

Answer: (B)

Verified step by step guidance

1. Understand that proteins have different levels of structural organization: primary, secondary, tertiary, and quaternary structures.
2. Recall that the primary structure of a protein refers to the specific linear sequence of amino acids linked by peptide bonds.
3. Recognize that the secondary structure involves local folding patterns like alpha-helices and beta-sheets formed by hydrogen bonding.
4. Know that the tertiary structure is the overall three-dimensional shape of a single polypeptide chain, including interactions between side chains.
5. Identify that the quaternary structure refers to the assembly of multiple polypeptide chains into a functional protein complex.