Multiple Choice
In protein biochemistry, the specific linear amino acid sequence of a protein is its:
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4. Protein Structure
Primary Structure of Protein
Multiple Choice
In biochemistry, what best defines the primary structure of a protein?
A
The local folding of the polypeptide backbone into -helices and -sheets stabilized by hydrogen bonds
B
The association of multiple polypeptide subunits into a functional protein complex
C
The linear sequence of amino acids in a polypeptide chain, linked by peptide bonds
D
The overall three-dimensional shape of a single polypeptide chain formed by side-chain interactions such as hydrophobic effects and disulfide bonds
Verified step by step guidance1
Understand that the primary structure of a protein refers to the most basic level of protein organization.
Recognize that the primary structure is defined by the linear sequence of amino acids in a polypeptide chain.
Know that these amino acids are linked together by peptide bonds, forming a continuous chain.
Distinguish the primary structure from higher levels of structure: secondary (local folding like α-helices and β-sheets), tertiary (overall 3D shape), and quaternary (assembly of multiple polypeptide subunits).
Conclude that the primary structure is essentially the unique order of amino acids, which ultimately determines the protein's higher-level structures and function.
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