Question

Which of the following answers describes the most direct consequence of tropomyosin binding to F-actin in muscle cells?

The (-) end of F-actin is stabilized

Loss of actin-ADP subunits from the (+) end is prevented

Myosin binding to F-actin is blocked

ATP hydrolysis by myosin is blocked
The movement of myosin towards the (+) end is blocked

Answer 1

Answer:

\rMyosin binding to F-actin is blocked

Explanation:

Tropomyosin is a protein involved in skeletal muscle contraction and that wraps around actin and prevents myosin from grabbing it. This prevents muscle contractions until the proper signal arrives. When the nervous system tells the muscle cell to contract, calcium is released.