Which of the following scenarios does NOT normally occur on a nuclear pore compl
ID: 99531 • Letter: W
Question
Which of the following scenarios does NOT normally occur on a nuclear pore complex?
A protein complex is imported into the nucleus, with ONLY one of its subunits containing a nuclear localization signal (NLS).
In a single pore, an NLS-containing protein is imported, while at the same time a nuclear export signal (NES)-containing protein is exported.
A nuclear import receptor is exported from the nucleus through the pore.
A protein is imported on its own through the pore, without the need for a separate import receptor.
All of the above are possible scenarios and occur naturally.
a.A protein complex is imported into the nucleus, with ONLY one of its subunits containing a nuclear localization signal (NLS).
b.In a single pore, an NLS-containing protein is imported, while at the same time a nuclear export signal (NES)-containing protein is exported.
c.A nuclear import receptor is exported from the nucleus through the pore.
d.A protein is imported on its own through the pore, without the need for a separate import receptor.
e.All of the above are possible scenarios and occur naturally.
Explanation / Answer
ANSWER:
(d) A protein is imported on its own through the pore, without the need for a separate import receptor.
Because the transport through nuclear pore complex is directional which occurs with the help of importin receptors and the exporting. The proteins do not get imported on its own.
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