Question

Which sentence does describe definition of tertiary structure of proteins?

A. Tertiary structure of proteins is defined as amino acid sequence of their polypeptide chain(s)
B. Tertiary structure of proteins is defined as regular set up of their polypeptide chain(s) to form
            a-helix or b-sheets.
C. Tertiary structure of proteins is defined as spatial set up of domains of proteins linked by
            peptide bounds.
D. Tertiary structure of proteins is defined as spatial set up of subunits of proteins linked by
            disulfide bounds.

Explain the difference between hydrogen bounds and electrostatic attractions involved in protein folding.

Answer 1

C sentence describe the definition of tertiary structure of proteins.

Hydrogen bonding and electrostatic attractions both are non covalent interactions but hydrogen bond is more strong non covalent bond.

Hydrogen bonding involves the attraction of dipole-dipole between partially electropositive and highly electonegative.

Electrostatic attractions involve the ionic interaction between ions and molecules with full charge of opposite signs.