Question

Primary protein is a linear chain of amino acids with :

• A. N- terminal at both ends
• B. C- terminal at both ends
• C. N- terminal at right end and C- terminal at left end
• D. N- terminal at left end and C- terminal right end

Answer 1

Answer: (D)

N- terminal at left end and C- terminal right end

Primary protein structure is the linear sequence of amino acids in a peptide or protein. By convention, the primary structure of a protein is reported starting from the amino-terminal (N) end to the carboxyl-terminal (C) end. Protein biosynthesis is most commonly performed by ribosomes in cells.
So, the correct option is option D.