pls answer this

Dear Student,

Ans. Option ii) Both Assertion and Reason are true but Reason is not the correct explanation of Assertion. 

The helical polypeptide chain undergoes coiling and folding to form a complex three-dimensional shape referred to as tertiary structure of proteins. These coils and folds are arranged to hide the non-polar amino acid chains and to expose the polar side chains. The tertiary structure is held together by the weak bonds formed between various parts of the polypeptide chain.

Regards