A small protein (molecular weight = 25,000 daltons) is injected into a cell and observed in the nucleus a short time later. What type of transport has taken place?
A small protein (molecular weight = 25,000 daltons) is injected into a cell and observed in the nucleus a short time later
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Passive Transport. A 25,000-dalton protein is small enough to diffuse through nuclear pores without any expenditure of energy.