1. Which of the following is an amino acid not found in proteins?A. asparagineB. ornithineC. isoleucineD. proline2. Which amino acid has the one-letter symbol E?A. AlysineB.phenylalanineC.histidineD.glutamic acid3. Which amino acid has the three-letter symbol asn?A.aspartic acidB.asparagineC.alanineD.arginine4. Which is a correct pair of abbreviations for an amino acid?A.Gin/NB.Tyr/TC.Asn/ND.Phe/PE.Pro/Q5. Which amino acid has a benzene-like ring?A.Glutamic AcidB.HistidineC.IsoleucineD.SerineE.Tyrosine6. Which amino acid is classified as polar?A.LB.HC.PD.I7. Which amino acids contain sulfur?A.cysteine and lysineB.cysteine and methionineC.arginine and methionineD.cysteine and isoleucine8. Which amino acid takes on a positive charge when the R-group gains a proton?A.Glutamic AcidB.HistidineC.GlutamineD.TyrosineE.Glycine