Multiple Choice
How many levels of structure do proteins have?
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2. Cell Chemistry & Cell Components
Proteins
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What level of protein structure describes the spatial location of every atom in a protein?
A
Primary structure
B
Tertiary structure
C
Quaternary structure
D
Secondary structure
Verified step by step guidance1
Understand the four levels of protein structure: primary, secondary, tertiary, and quaternary.
The primary structure refers to the sequence of amino acids in a polypeptide chain.
The secondary structure involves local folding into structures like alpha-helices and beta-sheets, stabilized by hydrogen bonds.
The tertiary structure describes the overall 3D shape of a single polypeptide chain, including the spatial arrangement of all its atoms.
The quaternary structure refers to the spatial arrangement of multiple polypeptide chains in a protein complex, if applicable.
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