NEET Biology question

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

(A)The central, unoverlapped part of the thick (myosin) filament in the A-bandCorrect
(B)Extension of actin filaments through the whole of the A-band
(C)The central gap between two successive Z-lines
(D)Extension of myosin filaments beyond the Z-line into the I-band

Answer: (A)

Solution

In a resting sarcomere, the thin filaments only partially overlap the free ends of the thick filaments, leaving a central part of the thick

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Question ID VK-117148