Question

The thick filaments in a sarcomere of a myofibril are held together by a thin fibrous membrane called

• A. Dobie’s line
• B. Krause’s membrane
• C. Z – Line
• D. M – Line

Hint:

In muscle fibers, the M-line is the central line in the sarcomere where the thick myosin filaments are anchored. It is crucial for maintaining the structure during muscle contraction.

Answer 1

The Correct Option is D

In the structure of the myofibril, the thick filaments in a sarcomere are connected by a fibrous membrane. This membrane is known as the M-line. The M-line plays a crucial role in the structural integrity and the alignment of thick filaments (myosin) within the sarcomere.