Answer:
Tropomysin, calcium
Explanation:
Tropomysin is a protein that prevents muscle contraction hence acts as a contraction inhibitor. It wraps around the actin blocking the binding sites for myosin on the actin.
Muscle will only contract when they get a rush of calcium ions.
The calcium ions binds to troponin, the troponin changes its shape. The change in shape will remove tropomyosin from the binding sites allowing myosin to bind on the actin leading to muscle contraction.
The base which is Uracil or Thymeine
Typically, a vacuole's job consists of isolating harmful materials, storing waste products, storing water in a plant cell, helping maintain the pressure within a cell, and exporting products out of the cell.