Question

The thick filament is made up of monomeric proteins called ______i_______ which has 2 parts, a globular head with short arm and a tail, the former is referred to as ______ii________ while the latter is referred to as ______iii________.

• A. i- meromysosin, ii- heavy meromyosisn, iii- light meromyosisn
• B. i- tropomyosin, ii- light meromyosisn, iii- heavy meromyosisn
• C. i- tropomysosin, ii- heavy meromyosisn, iii- light meromyosisn
• D. i- meromysosin, ii- light meromyosisn, iii- heavy meromyosisn

Answer 1

The correct option is A i- meromysosin, ii- heavy meromyosisn, iii- light meromyosisn

Myosin makes up the thick filament and is a polymerised protein. It is made up of meromyosin, a monomeric protein. Meromyosin has 2 parts: a globular head with short arm, called heavy meromyosin, and the tail, called light meromyosin. The head is an active ATPase enzyme that has binding sites for both ATP and actin filaments.