Changing a single amino acid in a protein consisting of 325 amino acids would
A) alter the primary structure of the protein, but not its tertiary structure or function.
B) cause the tertiary structure of the protein to unfold.
C) always alter the biological activity or function of the protein.
D) always alter the primary structure of the protein and disrupt its biological activity.
E) always alter the primary structure of the protein, sometimes alter the tertiary structure of the protein, and affect its biological activity.

Question

Quizplus · Accepted Answer

Changing a single amino acid can cause a change in the primary structure of a protein by altering the specific sequence of amino acids. Additionally, because the sequence of amino acids determines the protein's shape, any changes to the primary structure can affect the tertiary structure or 3D shape of the protein. Changes in the tertiary structure can lead to changes in the protein's function or biological activity. However, it is not always the case that a single amino acid change will disrupt the function of the protein, as some changes may be well-tolerated or may not affect critical functional regions of the protein.

Changing a Single Amino Acid in a Protein Consisting of 325