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Answer :
Final answer:
The transfer of mRNA from the nucleus to the cytosol occurs through the d) Nuclear pore pathway.
Explanation:
mRNA, or messenger RNA, is a crucial molecule in the process of protein synthesis. After transcription in the nucleus, mRNA needs to be transported to the cytosol, where ribosomes are located for translation. This transportation occurs through the nuclear pore pathway.
Within the nucleus, mRNA molecules are synthesized from DNA templates during transcription. Once formed, these mRNA strands must exit the nucleus to reach the cytosol where ribosomes can read the genetic code and synthesize proteins. The nuclear pore complex serves as a selective gateway for this movement. It is a large protein structure embedded in the nuclear envelope, containing proteins that facilitate the export of mRNA. This process is highly regulated and essential for proper cellular function.
To summarize, the transfer of mRNA from the nucleus to the cytosol occurs through the nuclear pore pathway, where the nuclear pore complex acts as a gatekeeper to ensure the correct molecules are transported. This mechanism is fundamental to gene expression and protein synthesis in eukaryotic cells.
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