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Which of the following is a characteristic of a quaternary protein structure?(a) Formed by any single peptide chain in a whole protein molecule(b) Arrangement of polypeptide chains(c) Arrangement of different folding of the structure(d) Arrangement of the water molecules on the surfaceI have been asked this question during an online interview.I need to ask this question from Biopharmaceuticals topic in chapter Biopharmaceuticals of Drug Biotechnology

Answer»

The correct option is (a) Formed by any SINGLE peptide chain in a whole protein molecule

To EXPLAIN I would say: Many proteins consist of a single polypeptide chain, and are DEFINED as monomeric proteins. Others may consist of two or more polypeptide chains that may be structurally IDENTICAL or totally unrelated. The ARRANGEMENT of these polypeptide subunits is called the quaternary structure of the protein.



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