Among the following,the essential amino acid is

Which of the following basic amino acids is the least basic?

The incorrect statement about denaturation of proteins is

All of the following statements apply to proteins except

Which structure$(s)$ of proteins remain$(s)$ intact during the denaturation process?

The number of possible tripeptides formed involving alanine $(ala)$,glycine $(gly)$,and valine $(val)$,where no amino acid has been used more than once is: