Question

Match List I with List II :List - I	List – II
A.	Primary structure of protein
B.	Secondary structure of protein
C.	Tertiary structure of protein
D.	Quaternary structure of protein
Choose the correct answer from the options given below :

• A. A-III, B-IV, C-II, D-I
• B. A-III, B-II, C-I, D-IV
• C. A-I, B-III, C-II, D-IV
• D. A-IV, B-III, C-II, D-I

Answer 1

Answer: (A)

A-III, B-IV, C-II, D-I

Answer 2

A. Primary structure of protein : The primary structure is the linear sequence of amino acids in a polypeptide chain. A-II

B. Secondary structure of protein : The secondary structure refers to local folded structures within the polypeptide chain, stabilized by hydrogen bonds. Common secondary structures include alpha helices and beta sheets. B-IV

C. Tertiary structure of protein : The tertiary structure is the overall 3D arrangement of a polypeptide chain, stabilized by various interactions, including disulfide bonds, hydrogen bonds, hydrophobic interactions, and ionic bonds. C-II

D. Quaternary structure of protein: The quaternary structure is the arrangement of mul tiple polypeptide chains (subunits) in a protein complex. Human hemoglobin, composed of four subunits, is an example of a protein with quaternary structure. D-I