Practice question · Select all that apply
Which statements about nuclear transport are correct?
Hints
- Three describe the transport system; one gets the envelope structure wrong.
- The nuclear envelope is a double membrane, continuous with the endoplasmic reticulum.
Show the answer
- A. Small molecules diffuse through pores freely
- C. Large proteins need a nuclear localisation signal
- D. Import of large cargo requires energy
Why
Small molecules pass freely, large ones need a signal and energy. The envelope is a double membrane, and its continuity with the endoplasmic reticulum is what allows newly made membrane protein to reach it.
Practise The Cell Nucleus
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