1.

Regarding secondary structure of a protein, correct statement(s) is/are (A) peptide bonds possess regional planarity(B) C = O and -NH- of different peptide chains are held by Van der Waal attarctions (C ) closely packed arrangement so as to minimise repulsion between ''R'' groups.

Answer»

only C
only B
A and B only
A and C only 

ANSWER :D


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