What kind of peptide Alanylglycyl phenylalanine is?

Tripeptide

The correct answer is option 4. Tripeptide.

A tripeptide is a peptide composed of three amino acid residues linked together by peptide bonds. In the case of "Alanylglycylphenylalanine," it contains three different amino acids: alanine, glycine, and phenylalanine. A peptide bond is a covalent bond formed between the carboxyl group of one amino acid and the amino group of another amino acid, resulting in the formation of a peptide linkage and the release of a water molecule. "Alanylglycylphenylalanine" consists of three amino acids (alanine, glycine, and phenylalanine) linked together by two peptide bonds. The first peptide bond links alanine to glycine, and the second peptide bond links glycine to phenylalanine.

Since "Alanylglycylphenylalanine" contains three amino acid residues linked together by peptide bonds, it is classified as a tripeptide. Each amino acid residue contributes to the overall structure and properties of the peptide.