RNA is able to exit the nucleus through nuclear pores. These are large protein complexes that act as gateways in the nuclear envelope, the membrane that surrounds the nucleus.

Here's how it works:

1. Transcription: RNA is synthesized within the nucleus from a DNA template.

2. Processing: The newly transcribed RNA undergoes processing steps, including capping, splicing, and polyadenylation.

3. Export Signal: During processing, the RNA acquires specific export signals, which are recognized by proteins called export receptors.

4. Binding: Export receptors bind to the RNA and guide it towards the nuclear pore.

5. Passage: The nuclear pore is a complex structure that allows selective passage of molecules. The export receptors, along with their bound RNA, interact with the nuclear pore proteins, allowing the RNA to pass through the pore.

6. Release: Once in the cytoplasm, the export receptor detaches from the RNA, and the RNA can then be translated into proteins.

This process is highly regulated, ensuring that only mature and functional RNA molecules leave the nucleus and enter the cytoplasm. This prevents errors in protein synthesis and maintains the integrity of the cell.