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a. Functional
i. Intronsmay control gene activity
ii. Alternate splicing can give >1 protein from the same gene
b. Evolutionary
i. Exons code for functional domains of proteins
ii. Widely spaced functional components allows recombination č new
proteins
Wiki User
∙ 11y ago
Wiki User
∙ 14y agoIntrons are the unread part of the DNA, which is taken out during transcription. The extrons are then connected together.
Introns = useless
extrons = necessary.
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What are introns and extrons and how are they different?
Exon DNA encodes for the RNA included in the final mRNA transcript that encodes for proteins. Intron DNA is found within exons, but is spliced out as the mRNA molecule is processed.
What are non-coding segments of DNA?
this is the correct answer i promise exonsIt's right ^^ It's not introns because introns do not code.
What happens to the introns and exons during transcription?
After transcription, the mRNA is processed by the spliceosome, which splices out the introns (because introns are not part of the coding sequences for protein), and "stitches" the exons together to form the final transcript that is sent to the ribosome for translation.
What are the sequences within mRNA that are spliced out?
Introns
In eukaryotes only exons are translated?
Correct. The mRNA transcibed from the DNA in the nucleus has both exons and introns; the introns are taken out and the exons are left in. The mended exons exit the nucleus and the introns stay in the nucleus. Only the exons are translated at the ribosomes. (In Eukaryotic cells only)
Which type of cell does not possess introns and extrons and produces polycystronic mRNA?
A prokaryotic cell.
What is cut out of RNA molecules?
Introns are cut out of RNA molecules. Extrons are "spliced" together afterwards. Think of a long strand that is white with blue on the ends. The white of the strand is the intron, while the blue color are the extrons. The white color or the "intron" is cut out, and then the two blue strands merge together known as the extrons splicing together.
What are introns and extrons and how are they different?
Exon DNA encodes for the RNA included in the final mRNA transcript that encodes for proteins. Intron DNA is found within exons, but is spliced out as the mRNA molecule is processed.
When was Introns - album - created?
Introns - album - was created on 2006-03-13.
Which part of the DNA molecule contains the genetic information used to make proteins?
The part of the DNA molecule that carries the genetic information is called the gene. It is the basic unit of heredity. The nucleotide base sequence encodes information. The bases of A,T and C,G code for the order of an Amino Acid which are the proteins. These four bases form millions of combinations that code for all the genetic material in a cell. These structures form the rungs of the ladder. DNA contains two different types of genes, known as introns and extrons. Extrons code for protein synthesis, and introns, as far as we can tell, play a role in determining when specific extrons will be expressed (which is to say, when they will actually be used for protein synthesis) and when they will remain dormant. Almost, the 4 types of nucleotides are "read" in groups of 3 to make 1 codon. Other than a start and stop codon, the rest are translated into amino acids. Those acids become proteins which are then made into genes, or cells of some kind.
Why are introns copied and then removed from the RNA sequence?
Introns were copied and then removed from the RNA sequence because they were placeholders.
What is the role of introns in gene regulation?
Introns are removed through RNA splicing. They don't play a role.
Do mitochondria have introns?
No, prokaryotes do not have introns, and therefore do not do RNA processing. However, eukaryotes do.
Why do the introns have to br removed?
Introns are the non-coding parts of the gene. If you didn't remove introns, the wrong protein may be produced because they allow more than one protein to be produced from a single gene.
Which one exons or introns is spliced out when primary RNA is processed?
The introns are the sections which are spliced out to create the mature form of mRNA.
What is the small pieces of DNA that are edited out of the mRNA message before it is expressed?
During the transcription, when the mRNA is being processed, the introns are removed and the exons are connected together.
What are non-coding segments of DNA?
this is the correct answer i promise exonsIt's right ^^ It's not introns because introns do not code.
