The H-zone in the skeletal muscle fibre is du | vedclass

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(A) The correct answer is $A$. Each muscle fibre contains many parallelly arranged myofibrils. Each myofibril consists of serially arranged functional

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the central gap between actin filaments extending through myosin filaments in the $A$-band

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(A) The correct answer is $A$. Each muscle fibre contains many parallelly arranged myofibrils. Each myofibril consists of serially arranged functional units called sarcomeres. Each sarcomere has a central $A$-band composed of thick myosin filaments and two half $I$-bands composed of thin actin filaments on either side,marked by $Z$-lines. In a resting state,the edges of the thin filaments on either side of the thick filaments partially overlap the free ends of the thick filaments. The central part of the thick filament that is not overlapped by thin filaments is known as the $H$-zone.

The $H$-zone in the skeletal muscle fibre is due to

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