Question

What is the composition of protein

Answer 1

Proteins are large molecules consisting of many amino-acids connected by “peptide linkages”. Peptide bond is produced when carboxyl radical of one amino acid reacts with the amino (-NH2) group of the other amino acid.

Answer 2

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There are 20 different amino acids which make up proteins. Each amino acid consists of a central carbon. The central carbon is bonded to an amine group (NH2), a carboxyl group (COOH), a hydrogen atom and an R group.

Amino acids can be linked together when the amine group of one amino acid is bonded to the carboxyl group of a different amino acid. The COOH donates an OH group and the NH2 donates a H. The OH and H come together to form a water molecule, so this process is called dehydration synthesis - water is removed to form something new. The bond which holds the amino acids together is called a polypeptide.