Although legalization activists and many marijuana users believe smoking pot has no negative effects, scientific research indicates that marijuana use can cause many different health problems. Marijuana is the most commonly used illicit drug in the United States.
A peptide bond (amide bond) is a covalent chemical bond formed between two amino acid molecules.ne loses a hydrogen and oxygen from its carboxyl group (COOH) and the other loses a hydrogen from its amino group (NH 2). This reaction produces a molecule of water (H 2 O) and two amino acids joined by a peptide bond (-CO-NH-).
The amino acids of a protein chain are covalently joined by amidebonds, often called peptide bonds: for this reason, proteins are also known as polypeptides .Proteins thus have a repeating backbone from which 20 different possible kinds of side chainsprotrude (see Figure 1-8).he amino acids of a protein chain are covalently joined by amidebonds, often called peptide bonds: for this reason, proteins are also known as polypeptides .Proteins thus have a repeating backbone from which 20 different possible kinds of side chainsprotrude (see Figure 1-8).