JEE MainChemistryBiomolecules
Identify the INCORRECT statement among the following:
Options
- ATyrosine is an aromatic amino acid but is considered non-essential.
- BMethionine is a sulfur-containing amino acid that readily undergoes dimerization via disulfide bond formation.
- CProline is the only standard naturally occurring amino acid that contains a secondary amino group.
- DHistidine, Arginine, and Lysine are classified as basic amino acids.
Correct answer
B. Methionine is a sulfur-containing amino acid that readily undergoes dimerization via disulfide bond formation.
Step-by-step solution
Let us evaluate each statement: Tyrosine contains a phenolic ring (aromatic) and can be synthesized in the human body from phenylalanine, making it a non-essential amino acid. This statement is correct. Proline has its side chain bonded to the -amino group, forming a pyrrolidine ring. It is an imino acid containing a secondary amine. This statement is correct. Histidine, Arginine, and Lysine contain basic functional groups in their side chains (imidazole, guanidino, and primary amino groups, respectively), classify