Which of the following would you use to inhibit the contraction of muscle in vitro as a control for an experiment you are conducting? A. a motor protein ATPase inhibitor

B. a drug that increases T-tubule depolarization

C. a drug that increases sarcoplasm Ca2+ concentration

D. a Ca2+-ATPase inhibitor

E. All would inhibit muscle contraction.

The correct answer is option A. a motor protein ATPase inhibitor.

Explanation:

Motor proteins are sub-atomic motors that utilize ATP hydrolysis to move along cytoskeletal filaments inside the cell. They satisfy numerous capacities inside the biological system, controlling the sliding of filaments for muscle contraction and intervening intracellular movement along biopolymer filament tracks.  

The two globular head motor areas in heavy chains can change over the chemical energy of ATP hydrolysis into mechanical work to move along microtubules.

Thus, in vitro experiment inhibitor of the motor protein, ATPase will be a control.

c. live where it’s cold and icy