After translation, what determines the fate of mRNA molecules?

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In summary, after translation, mRNA molecules can either be rebound by ribosomes and translated again, or degraded. The extent to which they are retranslated or degraded is controlled by sequences in the untranslated regions of the RNA. The mRNA acts as a recipe for making a protein with the help of tRNA and is subject to different half-lives depending on its specific sequence.
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What happens to mRNA's after translation. Do they get degraded?
 
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They can either be rebound by ribosomes and translated again or degraded. Sequences in the untranslated regions of the RNA control the extent to which certain mRNAs get retranslated or degraded.
 
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the mRNA can be then brought to the ribosome and then with the help of tRNA to help make a protein. Thnk of the mRNA as a recipe to make a protein.
 
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As Ygggdrasil says, mRNA molecules have a half life determined by the untranslated regions. Every mRNA is different. Some hang around for ages, others a rapidly degraded.
 

1. What is the purpose of mRNA's after translation?

After translation, mRNA's (messenger RNA) serve as a template for protein synthesis by carrying the genetic information from DNA to the ribosomes.

2. How are mRNA's processed after translation?

After translation, mRNA's undergo post-transcriptional modifications such as capping, polyadenylation, and splicing to form mature mRNA's that can be transported out of the nucleus for translation.

3. Are there any differences between mRNA's before and after translation?

Yes, mRNA's before translation contain introns (non-coding regions) that are removed during splicing to form mature mRNA's after translation. Additionally, the 5' cap and poly-A tail are added during post-transcriptional processing.

4. How long do mRNA's last after translation?

The lifespan of mRNA's after translation can vary depending on the specific mRNA and the cellular conditions. Some mRNA's can last for minutes, while others can last for days before being degraded. This is an important mechanism for regulating gene expression.

5. Can mRNA's undergo further modifications after translation?

Yes, some mRNA's can undergo additional modifications such as alternative splicing, which can produce different versions of the same protein from a single gene. mRNA's can also be targeted for degradation by various mechanisms to regulate protein levels in the cell.

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