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What is the molecule transcribed from DNA called?
initially its hrRNA or pre-mRNA. (same thing different name). this then undergoes some modification like splicing, capping and polyadenalation to make mRNA which is then translated into protein.
True or false In prokaryotes a cap and tail are plaved on the of an mRNA transcript to prevent the mRNA from being down?
False. In prokaryotes the transcript is immediately translated into proteins. This complex has its own technical name which escapes me for the moment. There is no modification of the gene needed as it is not leaving the nucleus the prokaryote does not have.
What process occurs when the DNA of a gene makes an mRNA molecule?
Transcription. In eukaryotes, the DNA is transcribed into pre-mRNA which then undergoes modification (involving the loss of introns). The newly polished mRNA is then transported out of the nucleus, into the cytoplasm to undergo translation by means of the ribosome. The ribosome translates the mRNA by pairing it with tRNA producing and amino acid sequence. The amino acid sequence is then shaped into a protein that is used in numerous ways to perform tasks throughout the organism.
Is removal of intervening sequences a modification which is likely to happen to the mRNA in eukaryotic cell?
Yes, a lot. Its happening here right now as I type this answer, and righ there while you sit reading this answer. It happens all the time.
What carry instructions for making proteins?
mRNA
How does pre mRNA become mRNA?
in the transition from pre-mRNA to mRNA, there are two major events that transform the polynucleotide chain. The first, is a modification of the ends, on the 5' end, there is a G cap added ( a g cap is derived from gtp), this g cap both helps the binding to ribosomes and protects against the break down by ribonuclease, to the 3' end a modification is made where by the AAUAAA sequence(which signals the cleaving enzyme)is cleaved off and replaced by a poly A sequence (100-200 nucleotides long), which assists in the transport of the mRNA out of the nucleous, and is vital to the polynucleotide's stability. The second modification is when the introns are removed, leaving just the exons.Hope this was helpful, -Brother of Captain Yitz
What is the molecule transcribed from DNA called?
initially its hrRNA or pre-mRNA. (same thing different name). this then undergoes some modification like splicing, capping and polyadenalation to make mRNA which is then translated into protein.
How is mRNA stabilized before leaving the nucleus for translation?
Before leaving the nucleus, the mRNA is modified (post-transcriptional modification). It is protected from ribonucleases by adding a 5' cap and a (3') poly A tail. These modifications help to stabilise the mRNA by preventing degradation by nucleases.
True or false In prokaryotes a cap and tail are plaved on the of an mRNA transcript to prevent the mRNA from being down?
False. In prokaryotes the transcript is immediately translated into proteins. This complex has its own technical name which escapes me for the moment. There is no modification of the gene needed as it is not leaving the nucleus the prokaryote does not have.
What process occurs when the DNA of a gene makes an mRNA molecule?
Transcription. In eukaryotes, the DNA is transcribed into pre-mRNA which then undergoes modification (involving the loss of introns). The newly polished mRNA is then transported out of the nucleus, into the cytoplasm to undergo translation by means of the ribosome. The ribosome translates the mRNA by pairing it with tRNA producing and amino acid sequence. The amino acid sequence is then shaped into a protein that is used in numerous ways to perform tasks throughout the organism.
What does a nucleus do in protein production and modification?
The nucleus is where DNA which codes for proteins is stored. The DNA is transcribed to make mRNA in the nucleus. The mRNA then leaves the nucleus where it is translated on the ribosomes into a series of amino acids which make up a protein. So the role of the nucleus is to tell the cell which proteins to make.
What is the function of snRNP?
The action of snRNPs is essential to the removal of introns from pre-mRNA, a critical aspect of post-transcriptional modification of RNA, occurring only in the nucleus of eukaryotic cells. Additionally, U7 snRNP is not involved in splicing at all, as U7 snRNP is responsible to process the 3′ stem-loop of histone pre-mRNA.
Is removal of intervening sequences a modification which is likely to happen to the mRNA in eukaryotic cell?
Yes, a lot. Its happening here right now as I type this answer, and righ there while you sit reading this answer. It happens all the time.
What carry instructions for making proteins?
mRNA
What is concept of mRNA?
Messenger RNA id transcribed from the DNA of the nucleus and then, after modification, leaves the nucleus. The mRNA is then threaded through a ribosome where translation takes place. A transfer RNA brings the amino acid that matches the three base codon of the mRNA to the ribosome, as these codons proceed through the ribosome the matching amino acids attach one to the other in a long chain that exists the ribosome as a polypeptide; the primary structure of a protein.
What does reverse transcriptase use from DNA?
Reverse transcriptase use mRNA to form DNA. mRNA
How do I do RNA modification?
Ribonucleotides are important macromolecules in organisms, as well as carriers of genetic information of cells, some viruses, and viroids. RNA can be divided into many types according to its function, mainly including the following types: mRNA, tRNA, rRNA, miRNA, snRNA, etc. For RNA with DNA coding, the work in the cell can be completed by the production of the protein it carries. Under the premise that the actual genetic sequence does not change, the change of gene expression will be affected by the chemical modification of RNA. This kind of epigenetic modification affects the biological processes of many organisms. BOC Sciences is capable of doing RNA modification.
