5 days ago · A protein is a naturally occurring, extremely complex substance that consists of amino acid residues joined by peptide bonds. Proteins are present in all living organisms and include many …

: any of numerous substances that consist of chains of amino acids, contain the elements carbon, hydrogen, nitrogen, oxygen, and often sulfur, include many compounds (as enzymes and hormones) …

Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues.

Proteins are molecules made of amino acids that send signals between cells, support digestion, help your muscles move and protect you from infection.

Oct 11, 2025 · Proteins are large molecules made up of chains of amino acids that are important for cell function, tissue structure, and body regulation. Most people in the U.S. consume more protein than …

Dec 13, 2017 · Proteins are a large class of biomolecules and macromolecules consisting of chains of amino acids called polypeptides. While simple proteins consist of a single polypeptide, many proteins …

Proteins are made up of long chains of amino acids, but they don't resemble linear pieces of spaghetti. The atoms in these long chains have their own attractive and repulsive properties.