Multiple Choice
The tertiary structure of a protein is not directly dependent on _____.
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4. Protein Structure
Tertiary Structure of Protein
Multiple Choice
The tertiary structure of a protein is best described as which of the following?
A
Linear sequence of amino acids in a polypeptide chain linked by peptide bonds
B
Overall three-dimensional folding of a single polypeptide chain driven by interactions among side chains (R groups)
C
Local regular structures such as -helices and -sheets formed primarily by backbone hydrogen bonding
D
Association of multiple polypeptide subunits into a functional protein complex
Verified step by step guidance1
Understand the levels of protein structure: primary, secondary, tertiary, and quaternary.
Recall that the primary structure refers to the linear sequence of amino acids linked by peptide bonds.
Recognize that secondary structure involves local folding patterns like α-helices and β-sheets stabilized mainly by hydrogen bonds in the backbone.
Identify that tertiary structure describes the overall three-dimensional shape of a single polypeptide chain, which is stabilized by interactions among the side chains (R groups) such as hydrophobic interactions, hydrogen bonds, ionic bonds, and disulfide bridges.
Note that quaternary structure refers to the assembly of multiple polypeptide subunits into a functional protein complex.
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