Coagulation of egg, on heating is because of :
- Denaturation of protein occurs
- Biological property of protein remains unchanged
- Breaking of the peptide linkage in the primary structure of protein occurs
- The secondary structure of protein remains unchanged
Answer
(1) Denaturation of protein occurs
Solution
As per NCERT, on heating, the hydrogen bonds holding the secondary and tertiary structures break ⇒ the protein unfolds (helix uncoils) and loses its biological activity — denaturation; boiled-egg coagulation is the NCERT example.
(A): denaturation occurs ⇒ (A) correct
(B): biological activity is lost ⇒ (B) wrong
(C): primary structure (peptide bonds) stays intact ⇒ (C) wrong
(D): secondary structure is destroyed ⇒ (D) wrong
Answer: (1)