Question

Listed below are certain proteins.
Which of them are the only structural proteins ?
(i) Collagen
(ii) Trypsin
(iii) Keratin
(iv) Actin
(v) Albumin
(vi) Tubulin

• A. (i), (iii), (vi)
• B. (ii), (iv), (v), (vi)
• C. (i), (iii), (iv), (v), (vi)
• D. (i), (iii), (iv), (vi)

Answer 1

The correct option is D (i), (iii), (iv), (vi)

Structural proteins
Structural proteins are the proteins which play an important role in cell shape maintenance in all organisms, movement and in providing support to bones, muscles, hair and muscles in animals. Some structural proteins are:

●Collagen - It is found in the connective tissues of the body like tendons, ligaments and skin, etc.
●Keratin - It is found in nails, skin and hair.
●Actin - It is found in the cytoskeletal microfilaments and in muscle fibrils
●Tubulin - It is found in the microtubules.
Final answer
(c) (i), (iii), (iv), (vi)