Final answer:
Gene expression can be regulated through post-transcriptional modifications such as RNA splicing and RNA stability. In addition, the transport of RNA from the nucleus to the cytoplasm is critical for gene expression.
Step-by-step explanation:
Gene expression can be controlled in RNA processing and nuclear transport through post-transcriptional modifications and regulations.
RNA Splicing: In this process, introns (non-coding regions) are removed from the pre-mRNA, and exons (coding regions) are joined together to form mature mRNA.
- RNA Stability: The stability of mRNA in the cytoplasm can be altered by RNA-binding proteins and microRNAs. These molecules can bind to specific regions of mRNA, either increasing or decreasing its stability.
- RNA created and spliced in the nucleus needs to be transported to the cytoplasm for translation. This transport is facilitated by the nuclear pore complex.
The primary topic of this question is how gene expression is controlled through RNA processing and nuclear transport.