Question

15. Which of the following statement is correct (a)Fibrous proteins are generally soluble in water (b)Albumin is an example of fibrous proteins (c)In fibrous proteins, the structure is stabilised by hydrogen bonds and disulphide bonds (d)pH does not affect the primary structure of protein​

Answer 1

Of the following statement (c)In fibrous proteins, the structure is stabilised by hydrogen bonds and disulphide bonds is correct

• In fibrous proteins the polypeptide chains run parallel with each other and the structure is stabilised by hydrogen bonds and disulphide bond. The structure formation is fibre like. Hence, option c is correct.
• Fibrous proteins are not soluble in water. Fibrous proteins like keratin don't dissolve in water. Hence, option a is incorrect.
• Albumin is an example of globular protein. Hence, option b is incorrect.
• pH affects the primary structure of protein, hence option d is incorrect.

Answer 2

(c) In fibrous proteins, the structure is stabilized by hydrogen bonds and disulfide bonds is the correct statement.

Explanation:

• Fibrous proteins are made up of polypeptide chains that are elongated and fibrous in nature or have a sheet like structure.

• These fibers and sheets are mechanically strong and are water insoluble.

• They are often structural proteins that provide strength and protection to cells and tissue.

• These polypeptide chains are held together by hydrogen and disulphide bond, in parallel manner. Due to which fibre-like structure is obtained. Such proteins are generally known as fibrous proteins. Ex: keratin, myosin.