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.
Peptides are compounds that are formed by linking one or more amino acids with a covalent bond. These compounds are classified as polymers, because they typically link together in long chains. All animals on Earth have them in their body, and in a way, they are one of the building blocks of life. covalent bond is a type of chemical bond that occurs when atoms share electrons. The specific type of covalent bond formed in these compounds is known as a peptide bond or amide bond, and it forms when the carboxl group of one amino acid attaches to another.