Question

The following statement about the primary structure of a protein is true, except

• A. It may be branched.
• B. It is determined by the structured of the corresponding DNA.
• C. It is unique to that protein and it determines the tertiary structure of the protein.
• D. It is the sequence of amino acids in the protein.

Answer 1

The correct option is A It may be branched.

Primary structure of protein refers to the linear chain of amino acids produced by linking together of amino acids through peptide bonds. The sequence of amino acids in the primary structure is determined by the sequence of nucleotides in nucleic acid acting as genetic material. The primary chain of amino acids folds into secondary structures like $\alpha$-helix and $\beta$-sheets. Tertiary structure is formed by folding of the secondary structures on to themselves, so that it is an interaction between secondary structures.