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What part is longer in an eukaryotic cell intron or exons?
In eukaryotic cells, introns are generally longer than exons. While exons are the coding regions that are expressed in proteins, introns are the non-coding segments that are spliced out during RNA processing. As a result, the total length of introns often exceeds that of exons, especially in complex genes with multiple introns.
Why do eukaryotic genes have introns but introns are absent from prokaryotic cells?
Look at the sheer amount of DNA that is contained into a eukaryotic gene (eukaryotes have more DNA to code for and so they can leave some of the DNA out, also look at the way the DNA is formed i.e. Eukaryotic genes are double stranded helixes and prokayrotic genes are a single strand of circular dna.
What portion of an eukaryotic gene is not spliced out?
In a eukaryotic gene, the portion that is not spliced out is the exons. Exons are the coding sequences that remain in the mature mRNA after the introns, which are non-coding regions, have been removed during the splicing process. These exons are then translated into proteins, while the introns are discarded.
Why prokaryotes do not have introns?
Prokaryotes do not have introns in their DNA because they lack a nucleus and have a simpler genetic organization compared to eukaryotes. Their genes are typically continuous sequences without interruptions, unlike eukaryotic genes which can have introns that need to be spliced out during gene expression.
Why would a prokaryote fail to express a transplanted eukaryotic gene?
The biggest obstacle to expressing eukaryotic genes in prokaryotes is their structure. Eukaryotic genes have non-coding introns inserted between the coding exons, and these introns must be spliced out of the primary mRNA transcript before translation can proceed. The splicing is done by the spliceosome, a large, complex of RNA and protein. Prokaryotes do not have spliceosomes, thus eukaryotic genes would be transcribed with the introns intact, and translation by the ribosome would proceed on the primary mRNA transcript, resulting in non-functional proteins.
What is the possible function of introns in eukaryotic DNA?
Introns in eukaryotic DNA may play a role in regulating gene expression, promoting genetic diversity, and facilitating the evolution of new genes.
Are introns present in prokaryotes?
No, introns are not present in prokaryotes. They are found in eukaryotic organisms, where they are removed during the process of gene expression.
Why are there introns present in eukaryotic genes?
Introns are present in eukaryotic genes because they allow for alternative splicing, which enables a single gene to code for multiple proteins. This increases the diversity of proteins that can be produced from a single gene, allowing for greater complexity and regulation in eukaryotic organisms.
What part is longer in an eukaryotic cell intron or exons?
In eukaryotic cells, introns are generally longer than exons. While exons are the coding regions that are expressed in proteins, introns are the non-coding segments that are spliced out during RNA processing. As a result, the total length of introns often exceeds that of exons, especially in complex genes with multiple introns.
Why do eukaryotic genes have introns but introns are absent from prokaryotic cells?
Look at the sheer amount of DNA that is contained into a eukaryotic gene (eukaryotes have more DNA to code for and so they can leave some of the DNA out, also look at the way the DNA is formed i.e. Eukaryotic genes are double stranded helixes and prokayrotic genes are a single strand of circular dna.
Sections of RNA molecules that are removed before eukaryotic gene becomes functional?
introns
What happens to introns in eukaryotic mRNA during the process of splicing?
During the process of splicing in eukaryotic mRNA, introns are removed. This leaves only the exons, which are the coding regions, to be joined together to form the final mRNA molecule that will be translated into a protein.
What portion of an eukaryotic gene is not spliced out?
In a eukaryotic gene, the portion that is not spliced out is the exons. Exons are the coding sequences that remain in the mature mRNA after the introns, which are non-coding regions, have been removed during the splicing process. These exons are then translated into proteins, while the introns are discarded.
Why prokaryotes do not have introns?
Prokaryotes do not have introns in their DNA because they lack a nucleus and have a simpler genetic organization compared to eukaryotes. Their genes are typically continuous sequences without interruptions, unlike eukaryotic genes which can have introns that need to be spliced out during gene expression.
What might be the evolutionary advantage of genes being interrupted by introns?
An intron is an area in the DNA that has not been translated into a protein. One evolutionary advantage of genes being interrupted by introns is that it reduces the occurrence of genetic mutations.
What are the regions of DNA called that code for protein?
The coding regions of many eukaryotic genes are interrupted by non-coding sequences known as INTRONS. They are stretches of DNA whose transcripts are absent from mature mRNA product.
What is the primary transcript of eukaryotic genes?
the primary transcript usually has a exons and introns which need to undergo splicing to remove the introns and re-splicing to join the exons ..after this process the resulting mRNA is a mature mRNA.
