13. Christian Anfinsen denatured ribonuclease (a single polypeptide chain) using a substance that reduces (breaks) disulfide bonds, causing the ribonuclease to unfold and lose its activity. Which of the following describes why the protein lost its activity? A. the secondary structure of the protein was changed B. the primary structure of the protein was altered C. No RNA was present to be degraded D. The structure of a protein dictates is function; the denatured (unfolded) ribonuclease did not have the correct structure 14. Which portion of an amino acid is unique among the different amino acids? A. the carboxyl group B. the amino group C. the hydrocarbon chain D. the N-terminus E. the R-group 15. Suppose you discovered a new amino acid. Its R-group contains only hydrogen and carbon atoms. Predict the behavior of this amino acid. A. It is hydrophobic. B. It is hydrophilic. C. Relative to the amino acids found in organisms, its interactions with water will be intermediate. D. Relative to the amino acids found in organisms, its interactions with water will be very high
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The protein lost its activity because the secondary structure of the protein was changed. When the disulfide bonds were broken, the protein unfolded, and its structure was altered. Since the structure of a protein dictates its function, the denatured ribonuclease Show more…
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