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, B, C only

A, B, D only

A, B, C, 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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