How does the concerted model explain the simultaneous conversion of all subunits between the T state and R state?

• A. The model suggests that all subunits convert together due to a natural equilibrium between the T and R states.
• B. The model suggests that subunits convert sequentially from T to R state.
• C. The model suggests that subunits convert independently based on substrate binding.
• D. The model suggests that subunits convert only when an inhibitor is present.

Answer: (A)