Which of the following descriptions about tertiary structure of protein are correct
A.
All polypeptide chains with tertiary structure have biological activities.
B.
Most hydrophilic groups are located on the surface of tertiary structure.
C.
The stability of tertiary structure is maintained by covalent bonds.
D.
T ertiary structure is t hree-dimensional arrangement of all atoms in a polypeptide chain.
E.
Formation of tertiary structure i s the result of interaction between side chain groups of a polypeptide chain.