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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)
Why ligation can be considered the reverse of the restriction enzyme process?
Restriction enzymes cuts out a specific short nucleotide sequence while as the process of ligation, DNA ligase joins them together. So ligase can be considered the reverse of the restriction enzyme process as it joins DNA fragments together instead of cutting them out.
What is the name of the remaining pieces after introns have been cut out of RNA molecules that are spliced together?
The introns are cut out in the spliceisome and the exon portions are spliced together. A poly adenine tail is added to one end and a modified guanine cap added to the other end. Then the mRNA leaves the cell nucleus and heads for the cytoplasm and a ribosome.
Are exons removed during the process of splicing in gene expression?
Yes, exons are not removed during the process of splicing in gene expression. Instead, introns are removed and exons are joined together to form the mature mRNA molecule.
What enzyme is necessary for transcription?
The enzyme RNA polymerase transcribes DNA. This enzyme initiates transcription, joins the RNA nucleotides together, and terminates.
What is the name of the enzyme that joins complementary DNA nucleoitide together?
General term.DNA polymerase.-----------------------
What does Phosphoglycerate kinase do?
Phosphorylase is an enzyme which joins with Glucose-1-phosphate together to make larger starch molecules. it is an example of synthesis (a joing together enzyme)
What enzyme joins pieces of DNA together?
Ligase is used to join DNA strands together
What are the coding segments of a stretch of eukaryotic DNA?
Exons
What principal enzyme involved in DNA replication joins individual nucleotides to produce a DNA molecule?
DNA Polymerase
How many Exons are present in EGFR?
The EGFR gene contains 28 exons.
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)
The special region of an enzyme that joins with the substrate?
The active site is the specific region of an enzyme that binds to the substrate molecule. This is where the chemical reaction catalyzed by the enzyme takes place. The active site is typically a pocket or groove on the enzyme's surface that is complementary in shape to the substrate molecule.
Why are exons important?
Exons are important because they contain the genetic information needed to code for proteins. During gene expression, exons are transcribed into mRNA which is then translated into proteins. Mutations or changes in exons can alter the sequence of amino acids in a protein, leading to functional changes or diseases.
Spliced together during mrna processing?
Exons, after the introns have been cleaved.
What is the difference between exons and introns?
Exons are the DNA sequences that code for proteins. Introns are involved however they dont carry the genetic information that exons carry, the variation provides for revolutionary flexibility allowing cells to shuffle exons between genes to make new ones. A great way to remember which is which is Exons (sounds like Executives, like in a business) have the information and introns (sounds like the interns of a business) dont know anything; exons and inrons, executives and interns. Easy huh?
What are RNA segments joined to one another by spliceosomes?
RNA segments joined together by spliceosomes are called exons. Spliceosomes remove introns from pre-mRNA molecules and ligate exons together to produce a mature mRNA transcript that can be translated into a protein. This process is known as RNA splicing.
