post transcriptional regulation in eukaryotes

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4 Terms

1
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phenotypic plasticity

from a single genotype, multiple phenotypes can be realised

2
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Why is RNA less stable than DNA (2)

  • extra OH on the 2’ carbon

  • therefore more reactive and prone to degradation


3
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5’ capping (4)

  • protects mRNA from degradation

  • inverted guanine, has been methylated and bonded to another 5’ end on a nucleotide, via triphosphate bridge

  • added after transcription

  • helps RNA be recognised by ribosomes


4
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polyadenylation / poly a tail (7)

  • at 3’ end

  • stabilised mRNA / stops degradation

  • aids in export from nucleus

  • long string of adenine nucleotides

  • added by poly a polymerase

  • more adenine’s, longer time able to protect mRNA from degradation

  • helps to interact with proteins involved in the recruitment of ribosomes