In eukaryotes, after transcription has occurred, introns are edited out and __ are expressed. mutrons Exons Axons Introns
The correct answer and explanation is:
The correct answer is Exons.
In eukaryotes, the process of transcription results in the formation of a precursor messenger RNA (pre-mRNA). This molecule contains both introns (non-coding sequences) and exons (coding sequences). After transcription, the pre-mRNA undergoes a process called RNA splicing, which removes the introns and connects the remaining exons together. This edited mRNA is then transported out of the nucleus and into the cytoplasm, where it serves as a template for protein synthesis.
The process of splicing is facilitated by a complex machinery called the spliceosome, which recognizes specific sequences at the intron-exon boundaries. Once the introns are removed, the exons are joined together to form a mature mRNA transcript that can be translated into a protein. The exons represent the regions of the gene that code for the amino acid sequence of the protein.
It’s important to note that introns do not code for proteins. Their removal during the splicing process ensures that the final mRNA contains only the coding sequences that are needed to synthesize a functional protein. While some of the regions within introns may have regulatory functions or contribute to the diversity of gene expression, they are not part of the final protein-coding sequence.
Mutrons and axons are not terms used in the context of transcription or RNA processing. Therefore, exons are the correct answer, as they are the expressed sequences that remain after the introns are removed.