Multiple Choice
Which amino acid is least likely to alter protein shape/function if substituted with an Arg residue?
4. Protein Structure
Altering Primary Protein Structure
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True or false: The following proteins with identical composition are certain to have the same shape/function.
Protein #1: L-G-T-V-R-D Protein # 2: D-R-V-T-G-L
A
True
B
False
Verified step by step guidance1
Understand that proteins are composed of amino acids linked in a specific sequence, and this sequence determines the protein's structure and function.
Recognize that even if two proteins have the same amino acid composition, the order or sequence of these amino acids can be different.
Recall that the primary structure of a protein is its unique sequence of amino acids, which directly influences its secondary, tertiary, and quaternary structures.
Consider that different sequences can lead to different folding patterns, resulting in distinct three-dimensional shapes and functions.
Conclude that identical amino acid compositions do not guarantee identical protein shapes or functions, as the sequence order is crucial.
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