Q.

The main forces that stabilize the 2o and 3o structures of a protein are.               (A) Hydrogen bonds                      (B) Bisulphide linkages                   (C) Vanderwaals forces                (D) Electrostatic forces

Moderate

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a

A, B, C only

b

A, B, D only

c

A, B, C, D

d

A, B,  only

answer is C.

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Detailed Solution

2o structure is mainly stabilized by H–bonding. Overall folding of 2o structure represents 3o structure.Thus  20 and 30 structures are stabilized by                    1) Bisulphide linkages (S – S)                2) Vanderwaals forces (between alkyl groups)                3) Electrostatic forces  (between -COO– and -NH3+ )                4) H-bonds between -CO- and -NH- gps
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