Question

In skeleton muscle Z-line is connected to.

• A. Actin
• B. Myosin
• C. Tropomyosin
• D. Hensen's line

Answer 1

The correct option is A Actin

• Each myofibril consists of a series of contractile units (sarcomeres) connected at a protein border (the Z line).
• Thin filaments(actin) of adjacent sarcomeres are present in the Z line between the thin filaments are thick filaments(myosin).
• The protein tropomyosin winds around the thin filaments and covers the myosin binding sites. Hence, In skeleton muscle, Z-line is connected to actin.

So, the correct answer is 'actin'.