Question

Differentiate between globular and fibrous proteins.

Answer 1

Globular protein	Fibrous protein
Have almost spherical shape due to folding of polypeptide chains.	Polypeptide chains consists of thread like molecule which tend to lie side by side to form fibres.
Soluble in water.	Insoluble in water.
Sensitive to small changes of temper­ature and pH. Therefore they undergo denatura- tion on heating or an treatment with acid or base.	Stable to moderate change of temperature and pH.
The interaction are (i) disulphide bridging (ii)  intermolecular hydrogen (iii)  vanderwaals attraction (iv)  dipolar attraction	Held together by disulphide bridges and weak intermolecular hydrogen bonds.