Proteins

Are there different proteins made by the same total number of amino acids?

Do the –H groups bound to the central carbons participate in the peptide bond?

What is the structural flat representation of an amino acid molecule?

What are proteins? How can the protein diversity of living beings be explained?

Does every amino acid have a central carbon? To which organic group is that central carbon bound?

Does the chemical reaction to unite amino acids incorporate or liberate atoms? What are the chemical entities incorporated or liberated in this reaction?

Do the amine and the carboxyl groups attached to central carbons participate in the union between amino acids? 

Which of the following is a non protein amino acid

(A) Ornithine

(B) β-alanine

(C) γ-amino butyric acid

(D) All of these

What is the importance of the –R group (variable radical) in an amino acid molecule?