Biology
Grade-8
Easy
Question
Which of the following are types of post-transcriptional control of genes in eukaryotes?
- Alternative RNA splicing or processing
- Gene silencing through RNA interference
- Destruction of ubiquitin tagged proteins
- All of the above
Hint:
There are three steps in post transcription: 5' capping, the addition of the poly A tail, and splicing.
The correct answer is: All of the above
- The pre-mRNA has to go through some modifications to become a mature mRNA molecule that can leave the nucleus and be translated.
- These include splicing, capping, and the addition of a poly-A tail, all of which can potentially be regulated – sped up, slowed down, or altered to result in a different product.
- some proteins must be proteolytically cleaved (chopped up) in order to become active. Proteins can be tagged for degradation by the addition of a chemical marker called ubiquitin.
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