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NEETZoologyLocomotion and Movement

What is the heavy meromyosin (HMM) component?

Options

  1. ATail
  2. BHead and short arm
  3. CFilamentous actin
  4. DTroponin

Correct answer

B. Head and short arm

Step-by-step solution

The striated appearance of myofibrils is due to the distribution pattern of two important proteins - Actin and Myosin. The light bands contain actin and the dark bands contain myosin.The light bands in a myofibril contain actin and is called I-band or Isotropic bandThe actin filaments are thinner as compared to the myosin filamentsEach actin (thin) filament is made of two "F" (filamentous) actins helically wound to each other.Each "F" actin is a polymer of monomeric "G" (Globular) actinsTwo filaments of another pro

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