Cell Organelles: Structure and Functions · Zoology

Which of the following describes the function of the nuclear pore complex?

  1. Passive diffusion of all cellular proteins regardless of size or charge
  2. Selective transport of RNA and proteins between the nucleus and cytoplasm
  3. Synthesis and insertion of new lipids into the nuclear envelope bilayer
  4. Attachment site for spindle fibers during mitotic chromosome segregation
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Correct answer: Selective transport of RNA and proteins between the nucleus and cytoplasm

Nuclear pores are gatekeepers that regulate the entry and exit of molecules. Small molecules diffuse freely, but large proteins and RNA require specific signal sequences and carrier proteins to pass through.

Difficulty: Medium Question 17 of 20

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