Multiple Choice
Which of the following correctly represents the number of levels of protein structure involved in protein folding?
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4. Protein Structure
Protein Folding
Multiple Choice
In the context of protein folding, which property primarily determines the function of a protein?
A
Its mRNA sequence and codon usage in the gene
B
Only its amino acid composition, regardless of sequence or folding
C
The number of peptide bonds in the polypeptide chain
D
Its three-dimensional (tertiary/quaternary) structure formed by folding
Verified step by step guidance1
Understand that a protein's function is closely related to its specific shape or structure, which is determined by how the polypeptide chain folds into its three-dimensional form.
Recognize that the primary structure of a protein is its amino acid sequence, but this sequence alone does not determine function without proper folding.
Recall that the folding process leads to the formation of secondary, tertiary, and sometimes quaternary structures, which create the unique active sites and interaction surfaces necessary for function.
Note that while the mRNA sequence and codon usage influence the amino acid sequence, they do not directly determine the protein's functional shape after folding.
Conclude that the correct property determining protein function is its three-dimensional (tertiary or quaternary) structure formed by folding, as this structure enables the protein to interact specifically with other molecules.
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