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What is meant by tertiary structure of p...

What is meant by tertiary structure of proteins?

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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.
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[A] : Peptide bonds are present in primary , secondary & tertiary structures of proteins . [R] : All structures of protein contain amino acids .

Assertion : Enzymes become denatured at high temperature . Reason : the tertiary structure of proteins gets damaged at high temperature .