Which row correctly describes the structure of proteins?
- APrimary structure is the number of amino acids present in a protein; tertiary structure is the result of cross bonding between all the amino acids in the primary structure; quaternary structure is the polypeptides that link together to form a protein
- BPrimary structure is the order of amino acids present in a protein encoded by DNA; tertiary structure is the shape formed by folding of a polypeptide and held together by hydrogen bonds; quaternary structure contains two types of polypeptide that interact forming the shape of a protein
- CPrimary structure is the result of translation of an mRNA molecule by a ribosome into a chain of amino acids; tertiary structure is the result of ionic and hydrogen bonds, disulfide bridges and hydrophobic interactions between amino acids; quaternary structure is formed by four polypeptides and an additional reactive group attached to the protein
- DPrimary structure is the sequence of amino acids in a protein coded by an mRNA molecule; tertiary structure is formed as a result of interaction of the side chains of amino acids in the primary structure; quaternary structure is formed by the linking together of more than one polypeptide to form a protein