No, because tropomyosin cannot move before calcium ions bind to troponin
Explanation:
Tropomyosin cannot move unless calcium binds to troponin. This is because this is the main purpose of calcium being in this system. Tropomyosin acts as a gateway and stops actin to bind with myosin. If tropomyosin moves anyways, then there is no requirement of calcium in the system. It is of further importance to consider that stimulus from nerve impulse causes calcium gates to open, thus causing series of actions causing muscle contraction.
