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2) You are studying actin polymerization in a solution. You perform an experiment where you add...

2) You are studying actin polymerization in a solution. You perform an experiment where you add free actin, and wait a sufficiently long time. You notice that at some concentration of added actin, increasing the concentration of actin beyond that point increases the average actin filament mass in grams/mL

A) The point at which actin filament mass increases is the critical concentration

B) dPol/dt=0, so free actin concentration is the same across the entire range of added concentrations.

C) Above the critical concentration, actin monomer concentration remains constant

D) A and C

E) A B, and,C

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Option C is the right answer as a critical concentration (Cc) is a concentration at which G-actin is in equilibrium with F-Actin so the amount of G-actin beyond the Cc will add up into F-actin and increases the mass, therefore, actin monomer conectration will be same beyond Cc.    

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