99 Percentile Qs Bank for JEE MainChemistryBiomolecules
Which one of the following statements about protein structure is correct ?
Options
- AProteins consisting of one polypeptide can have quaternary structure
- BThe formation of a disulphide bond in a protein requires that the two participating cystine residues be adjace
- CThe stability of quaternary structure in proteins is mainly due to covalent bonds among the subunits.
- DThe information required for the correct folding of a protein is contained in the specific sequence of amino a
Correct answer
D. The information required for the correct folding of a protein is contained in the specific sequence of amino a
Step-by-step solution
The correct folding of a protein is guided by specific interactions among the side chains of the amino acid residues of a polypeptide chain. The two cystine residues that react to form the disulphide bond may be a great distance apart in the primary structure (or on separate polypeptides) but are brought into close proximity by the three - dimension folding of the polypeptide chain.