Small molecules (

Question

Small molecules (< 20 kd) enter nuclei by way of
A) passive diffusion through nuclear pore complexes.
B) selective transport through nuclear pore complexes.
C) active transport across the nuclear envelope membranes.
D) passive diffusion across the nuclear envelope membranes.

Quizplus · Accepted Answer

Small molecules (< 20 kd) can enter nuclei through the nuclear pore complexes by passive diffusion. The nuclear pore complexes act as selective gates and allow the free diffusion of small molecules below this size limit.

Small Molecules (< 20 Kd) Enter Nuclei by Way of