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Biology · CELL THE UNIT OF LIFE

हिन्दी

What is the typical width of the perinuclear space between the outer and inner nuclear membranes, and what is the primary role of nuclear pores traversing this envelope?

  1. 1 to 5 nm; selective passage of lipids only into the cytoplasm
  2. 10 to 50 nm; bidirectional movement of RNA and protein molecules between nucleus and cytoplasm
  3. 100 to 500 nm; irreversible extrusion of degraded chromatin fragments
  4. 50 to 100 nm; unidirectional transport of ribosomal subunits exclusively into the nucleoplasm

Correct answer · Option 2

10 to 50 nm; bidirectional movement of RNA and protein molecules between nucleus and cytoplasm

Explanation

The perinuclear space is 10 to 50 nm wide, and nuclear pores allow bidirectional movement of RNA and protein molecules between the nucleus and the cytoplasm.
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