JUNE 2024 — Chemistry STD 12 Science — Question

⇒ Proteins can be classified into two types on the basis of their molecular shape.
⇒ (a) Fibrous protein compounds:
→ When the polypeptide chains run parallel and are held together by hydrogen and disulphide bonds, then fibre like structure is formed. Such proteins are generally insoluble in water. Some common example are keratin (present in hair, wool, silk) and myosin (present in muscles) etc.
⇒ (b) Globular protein compounds
→ This structures results when the chains of polypeptides coil around to give a spherical shape. These are usually soluble in water. Insulin and albumins are the common examples of globular proteins.