Alpha-keratin is a protein present in

Which structure of protein is controlled by genes?

What type of amino acids are leucine,isoleucine,and valine?

What is released during the formation of a peptide bond?

If $R$ group is hydroxy methyl,then the amino acid is.........

Statement $P$: The quaternary structure of proteins is either globular or fibrous.
Statement $Q$: The three-dimensional arrangement of molecules consisting of a single polypeptide chain is the quaternary structure of proteins.