How does the process of gene expression work?
Gene expression is the process by which genetic information is used to create functional gene products, such as proteins. The process of gene expression involves two main stages: transcription and translation.
In transcription, the DNA sequence of a gene is copied into a messenger RNA (mRNA) molecule, which carries the genetic information to the ribosome, the site of protein synthesis. In the nucleus, the DNA double helix unwinds and one of the strands is used as a template to synthesize a complementary RNA molecule. This RNA molecule is modified and processed to form a mature mRNA molecule, which can then exit the nucleus and move to the cytoplasm.
In translation, the ribosome reads the sequence of codons in the mRNA molecule and uses this information to assemble a chain of amino acids, the building blocks of proteins. The order of amino acids in the protein is determined by the sequence of nucleotides in the mRNA molecule. The process of translation involves three main steps: initiation, elongation, and termination.
Several factors can regulate the process of gene expression, including transcription factors, epigenetic modifications, and post-transcriptional processing. Understanding how these processes work is essential for developing new treatments for genetic disorders and diseases.
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