What term is given to the unfolding of proteins?

The correct answer is Option (3) → Denaturation

NCERT (2026-27 edition):
10.2.4 Denaturation of Proteins – “… When a protein in its native form, is subjected to physical change like change in temperature or chemical change like change in pH, the hydrogen bonds are disturbed. Due to this, globules unfold and helix get uncoiled and protein loses its biological activity. This is called denaturation of protein. During denaturation secondary and tertiary structures are destroyed but primary structure remains intact.”