Match List-I with List-II. Choose the correct answer from the options given below :
- A-III, B-IV, C-II, D-I
- A-III, B-II, C-I, D-IV
- A-I, B-III, C-II, D-IV
- A-IV, B-III, C-II, D-I
Answer
(1) A-III, B-IV, C-II, D-I
Solution
A. Primary structure — sequence of amino acids in the polypeptide chain (A-III).
B. Secondary structure — folding of the chain into an -helix or -pleated sheet (B-IV).
C. Tertiary structure — further 3-D folding, stabilised by bonds such as disulphide bonds (C-II).
D. Quaternary structure — assembly of more than one polypeptide (subunit), e.g. human haemoglobin with 4 subunits (D-I).
Thus, A-III, B-IV, C-II, D-I.
Answer: (1)