Biology
Grade-8
Easy

Question

Which of the following are types of post-transcriptional control of genes in  eukaryotes?

  1. Alternative RNA splicing or processing
  2. Gene silencing through RNA interference
  3. Destruction of ubiquitin tagged proteins
  4. All of the above

hintHint:

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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