A segment of a protein consists of the following amino acid sequence: 
—Ile—Phe—Thr—Asp—
Based on their properties, identify the amino acids found in the interior and exterior of the protein. What is the relationship between a protein's primary structure and its tertiary structure?

• A. Thr and Asp are likely to be found in the interior of the protein, while Ile and Phe are likely found on the exterior of the protein. The primary structure dictates the specific interactions and folding patterns that result in the unique tertiary structure of the protein.
• B. Ile and Phe are likely to be found in the interior of the protein, while Thr and Asp are likely found on the exterior of the protein. The primary structure dictates the specific interactions and folding patterns that result in the unique tertiary structure of the protein.
• C. Thr and Asp are likely to be found in the interior of the protein, while Ile and Phe are likely found on the exterior of the protein. The primary structure prevents amino acid interactions which allows folding patterns that result in the unique tertiary structure of the protein.
• D. Ile and Phe are likely to be found in the interior of the protein, while Thr and Asp are likely found on the exterior of the protein. The primary structure prevents amino acid interactions which allows folding patterns that result in the unique tertiary structure of the protein.

Answer: (B)