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 protein is a peptide, but a peptide is not always a protein. As the article pointed out, a peptide with 50 or more amino acids is considered a protein. Anything less than that and it doesn't meet the protein qualification. 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.