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What is the name of the dark band in a myofibril?

Options

  1. AZ-line
  2. BThick filament
  3. CI-band
  4. DA-band

Correct answer

D. A-band

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 filaments. Hence, they are commonly referred to as thin filaments and thick filaments, respectively. The dark band in a myofibril is called A or Anisotropic band and contains myosin .Skeletal musc

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