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.
metallic bond-a chemical bond in which electrons are shared over many nuclei and electronic conduction occurs. peptide bond, peptide linkage-the primary linkage of all protein structures; the chemical bond between the carboxyl groups and amino groups that unites a peptide.ttraction, attractive force-the force by which one object attracts another. covalent bond-a chemical bond that involves sharing a pair of electrons between atoms in a molecule. cross-link, cross-linkage-a side bond that links two adjacent chains of atoms in a complex molecule.