The following observations are made on a 30-residue polypeptide: (a) Unordered structure is observed in water but a helical conformation is observed in a medium of low dielectric constant. (b) The peptide is resistant to degradation by proteases. (c) Red blood cells are lysed by the peptide. (d) β-mercaptoethanol has no effect on peptide structure. Which of the following statements can be correctly attributed to the above observations?

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Biology · Biochemistry

Verified Solution4 OptionsUpdated: October 2026👁️1 View

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Correct answer

The peptide is entirely composed of D-amino acids and is amphipathic.

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Answer 1

The peptide is entirely composed of L-aromatic amino acids.

Answer 2

The peptide is rich in disulphide bonds between D-cysteines.

Answer 3

The peptide is entirely composed of L-amino acids and is not amphipathic.

Answer 4

The peptide is entirely composed of D-amino acids and is amphipathic.

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