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BIO NMDCAT Proteins
nmdcat.online June 29, 2026

The primary structure of a protein refers to the

A. Local folding patterns like α-helices and β-sheets
B. Overall three-dimensional fold of a single polypeptide chain
C. Linear sequence of amino acids joined by peptide bonds
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D. Association of multiple polypeptide subunits

📝 Explanation

Primary structure is the linear, genetically determined sequence of amino acids in a polypeptide chain, held together by covalent peptide bonds. This sequence dictates all higher levels of protein structure.

📖 Additional Information

  • Local folding patterns like α-helices and β-sheets
  • Overall three-dimensional fold of a single polypeptide chain
  • Linear sequence of amino acids joined by peptide bonds
  • Association of multiple polypeptide subunits

Primary structure is the linear, genetically determined sequence of amino acids in a polypeptide chain, held together by covalent peptide bonds. This sequence dictates all higher levels of protein structure.

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