Final answer:
The degree of polarity of peptides can be determined by analyzing the amino acids they are composed of. Polar amino acids contribute to more polar peptides, while nonpolar amino acids contribute to more nonpolar peptides. By comparing the amino acids in the given peptides, we can order them based on their degree of polarity.
Step-by-step explanation:
The peptides can be ordered based on the degree of polarity of their constituent amino acids. The more polar amino acids are considered more polar peptides, while the more nonpolar amino acids are considered more nonpolar peptides. To determine the degree of polarity, we need to look at the characteristics of the side chains of the amino acids.
The amino acids in peptide A are Serine (S), Glycine (G), Alanine (A), Lysine (K), Arginine (R), Histidine (H). Comparing these amino acids, we can see that Serine and Lysine are polar amino acids, while Glycine, Alanine, Arginine, and Histidine are nonpolar amino acids. Therefore, peptide A would be considered the most polar peptide.
Similarly, we can analyze the amino acids in the remaining peptides to determine their degree of polarity:
Peptide B: Cysteine (C), Alanine (A), Tryptophan (W), Asparagine (N), Glycine (G), Glutamine (Q), Valine (V). Cysteine, Tryptophan, and Asparagine are polar amino acids, while Alanine, Glycine, Glutamine, and Valine are nonpolar amino acids. Therefore, peptide B would be considered less polar than peptide A but more polar than the remaining peptides.
Peptide C: Phenylalanine (F), Tryptophan (W), Glycine (G), Threonine (T), Serine (S), Isoleucine (I), Leucine (L), Alanine (A). Phenylalanine, Tryptophan, Isoleucine, Leucine, and Alanine are nonpolar amino acids, while Glycine, Threonine, and Serine are polar amino acids. Therefore, peptide C would be considered less polar than peptide B but more polar than the remaining peptides.
Peptide D: Aspartic acid (D), Aspartic acid (D), Alanine (A), Glutamic acid (E), Isoleucine (I), Histidine (H), Tryptophan (W), Alanine (A). Aspartic acid, Glutamic acid, Isoleucine, Histidine, and Tryptophan are nonpolar amino acids, while Alanine is a polar amino acid. Therefore, peptide D would be considered less polar than peptide C and peptide B but more polar than the remaining peptides.
Peptide E: Serine (S), Serine (S), Threonine (T), Alanine (A), Methionine (M), Tyrosine (Y), Arginine (R), Lysine (K). Serine, Threonine, Alanine, Methionine, Tyrosine, Arginine, and Lysine are polar amino acids. Therefore, peptide E would be considered the least polar peptide.