At ATP-G-actin concentrations that are intermediate between the Cc for the (+)end and the Cc for the (-)end,_____ will be observed.The Cc needed for elongation at the (+)end is _____ than that at the (-)end of actin microfilaments.
A)growth;lower
B)shrinking,higher
C)treadmilling,lower
D)none of the above

Question

Quizplus · Accepted Answer

At intermediate ATP-G-actin concentrations, treadmilling is observed, where actin monomers add to the (+) end and dissociate from the (-) end, resulting in overall movement of the filament. The Cc needed for elongation at the (+) end is lower than that at the (-) end, which means it is easier for actin monomers to add to the (+) end and therefore promote growth.

At ATP-G-Actin Concentrations That Are Intermediate Between the Cc for the (+)End