What structure is composed of protein filaments and is located in the center of the thick filaments?
A)Z disk
B)titin
C)M line
D)actin

Question

Quizplus · Accepted Answer

The M line is a protein structure located in the center of the sarcomere, at the midpoint of the thick filaments. It is composed of various proteins, including myomesin and M-protein, and helps to stabilize and anchor the thick filaments in place during muscle contraction.

What Structure Is Composed of Protein Filaments and Is Located