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.
A peptide bond (amide bond) is a covalent chemical bond formed between two amino acid molecules. peptide bond can be broken by hydrolysis (the adding of water). In the presence of water they will break down and release 8â16 kilojoule / mol (2â4 kcal / mol) of free energy. This process is extremely slow. In living organisms, the process is catalyzed by enzymes.