In the graph to the right, the magnitude of concentration difference across the
ID: 323063 • Letter: I
Question
In the graph to the right, the magnitude of concentration difference across the nuclear pore complexes (NPCs) is plotted for four molecules (A to D) as a function of time, starting from an arbitrarily chosen initial concentration difference. Indicate which curve corresponds to each of the following molecules. Put the letter in the corresponding parenthesis.
( ) A large protein that is being actively transported across the NPC
( ) A small water-soluble molecule
( ) A small protein composed of a few dozen residues
( ) A large protein that is NOT actively transported into or out of the nuclear.
Concentration difference across the nuclear envelope (nM)Explanation / Answer
B. A small water-soluble molecule
D. A large protein that is NOT actively transported into or out of the nuclear.
C. A small protein composed of a few dozen residues
A. A large protein that is being actively transported across the NPC
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