Question

The muscles involved in locomotory actions and changes of body postures are also called striated muscles because

• A. Sarcolemma forms alternating dark and light bands
• B. Muscle bundles have alternating distribution of regulatory proteins
• C. Fascicles are arranged to form alternating bands
• D. Each myofibril has alternate dark and light bands

Answer 1

The correct option is D Each myofibril has alternate dark and light bands

Answer (3)
The muscle fibres contain parallelly arranged myofibrils which have alternate light and dark bands.
The dark band is called A-band and the light band present on myofibril is called I-band.