What Structure Contains Proteins That Stabilize the Thin Filaments

Question

What structure contains proteins that stabilize the thin filaments?
A) Z line
B) M line
C) A band
D) I band

Accepted Answer

The Z line is a protein structure that anchors the thin filaments and contains proteins that stabilize them. It is located at the ends of the sarcomere and marks the boundary between adjacent sarcomeres. The other options (M line, A band, and I band) do not contain proteins specifically dedicated to stabilizing thin filaments.