The edible portions of the leek are the white base of the leaves (above the roots and stem base), the light green parts, and to a lesser extent the dark green parts of the leaves. One of the most popular uses is for adding flavor to stock.
HOME BIOLOGY DEFINITION. Peptide bond. A peptide bond is a chemical bond formed between two molecules when the carboxyl group of one molecule reacts with the amino group of the other molecule, releasing a molecule of water (H 2 O). This is a dehydration synthesis reaction, and usually occurs between amino acids.
Explain how a peptide bond forms between two amino acids. A peptide bond links the carboxyl group of one amino acid with the amino group. List and describe the three major components of an amino acid. Explain amino acids may be grouped according to the physical and chemical properties of the R group. At the pH in a cell, the amino and carboxyl groups are usually ionized.