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mRNA modifications refer to the chemical changes made to the RNA molecule after it is transcribed from DNA. These modifications can include capping, polyadenylation, and various internal modifications that affect stability, translation, and overall function. If something is described as "not a modification to the mRNA," it suggests that it does not involve altering the RNA itself, but may pertain to other processes or components in gene expression.
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In prokaryotes a cap and tail are placed on the ends of an mrna transcript to prevent the mrna from being broken down?
Actually, in prokaryotes, a cap and tail are not added to the mRNA transcript. Instead, prokaryotic mRNA is directly translated without modification. This is in contrast to eukaryotes, where mRNA undergoes modification at the 5' end with a cap and at the 3' end with a poly-A tail to protect it from degradation.
What is the purpose of polyadenylation of mRNA of the nucleus?
Polyadenylation of mRNA in the nucleus serves several key purposes: it adds a long stretch of adenine nucleotides (the poly(A) tail) to the 3' end of the mRNA transcript, which enhances mRNA stability and protects it from degradation. This modification also plays a crucial role in the regulation of nuclear export, facilitating the transport of mature mRNA to the cytoplasm. Additionally, the poly(A) tail is important for efficient translation of the mRNA into protein by aiding in the initiation of translation.
What are the the three parts of protein synthesis?
Protein synthesis consists of three main parts: transcription, translation, and post-translational modification. During transcription, the DNA sequence of a gene is copied into messenger RNA (mRNA) in the nucleus. Next, during translation, the mRNA is read by ribosomes in the cytoplasm to assemble amino acids into a polypeptide chain, forming a protein. Finally, post-translational modification involves the folding and chemical modification of the protein to achieve its functional form.
Is removal of intervening sequences a modification which is likely to happen to the mRNA in eukaryotic cell?
Yes, removal of intervening sequences (introns) is a common modification that occurs to pre-mRNA in eukaryotic cells through a process called splicing. This process removes the introns and joins the coding regions (exons) together to form mature mRNA that can be translated into proteins.
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.
In prokaryotes a cap and tail are placed on the ends of an mrna transcript to prevent the mrna from being broken down?
Actually, in prokaryotes, a cap and tail are not added to the mRNA transcript. Instead, prokaryotic mRNA is directly translated without modification. This is in contrast to eukaryotes, where mRNA undergoes modification at the 5' end with a cap and at the 3' end with a poly-A tail to protect it from degradation.
How does pre mRNA become mRNA?
Pre-mRNA undergoes a process called RNA splicing, where non-coding regions (introns) are removed and the coding regions (exons) are joined together. This forms mature mRNA, which can then be translated by ribosomes into proteins.
What is the purpose of polyadenylation of mRNA of the nucleus?
Polyadenylation of mRNA in the nucleus serves several key purposes: it adds a long stretch of adenine nucleotides (the poly(A) tail) to the 3' end of the mRNA transcript, which enhances mRNA stability and protects it from degradation. This modification also plays a crucial role in the regulation of nuclear export, facilitating the transport of mature mRNA to the cytoplasm. Additionally, the poly(A) tail is important for efficient translation of the mRNA into protein by aiding in the initiation of translation.
What are the the three parts of protein synthesis?
Protein synthesis consists of three main parts: transcription, translation, and post-translational modification. During transcription, the DNA sequence of a gene is copied into messenger RNA (mRNA) in the nucleus. Next, during translation, the mRNA is read by ribosomes in the cytoplasm to assemble amino acids into a polypeptide chain, forming a protein. Finally, post-translational modification involves the folding and chemical modification of the protein to achieve its functional form.
Is removal of intervening sequences a modification which is likely to happen to the mRNA in eukaryotic cell?
Yes, removal of intervening sequences (introns) is a common modification that occurs to pre-mRNA in eukaryotic cells through a process called splicing. This process removes the introns and joins the coding regions (exons) together to form mature mRNA that can be translated into proteins.
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?
mRNA is stabilized in the nucleus through the addition of a 5' 7-methylguanosine cap and a 3' poly-A tail. These modifications protect the mRNA from degradation and signal for its export to the cytoplasm for translation. Additionally, RNA-binding proteins assist in stabilizing mRNA and regulating its processing.
Know the correct order of the steps of protein symtem?
The correct order of protein synthesis is transcription (DNA is copied into mRNA), translation (mRNA is decoded to build a protein), and post-translational modification (protein may undergo changes like folding or addition of functional groups).
What is the process of post-transcriptional modification?
Post-transcriptional modification is a process in cell biology by which, in eukararyotic cells, primary transcript RNA is converted into mature RNA. A notable example is the conversion of precursor messenger RNA into mature messenger RNA (mRNA), which includes splicing and occurs prior to protein synthesis. This process is vital for the correct translation of the genomes of eukaryotes as the human primary RNA transcript that is produced as a result of transcription contains both exons, which are coding sections of the primary RNA transcript.
What is s poly-A tail?
A poly-A tail is a stretch of adenine nucleotides added to the 3' end of a messenger RNA (mRNA) molecule during post-transcriptional modification in eukaryotic cells. This tail plays a crucial role in stabilizing the mRNA, facilitating its export from the nucleus, and enhancing its translation into proteins. The length of the poly-A tail can influence the mRNA's stability and the efficiency of protein synthesis.
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 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.
