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... before genetic messages are dispatched to the cytoplasm. RNA Processing Alteration of mRNA ends: Each end of a pre-mRNA molecule is modified in a particular way. The 5’ end, the end made first during transcription is immediately capped of with a _______________ form of a ____________ (G) nucleotide. ...
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DNA and PROTEIN SYNTHESIS
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DNA replication notes

... *These are 3 letter sequences called START and STOP codons. Codons – 3 letter base segments on the mRNA 5) DNA strand “zips” back together and mRNA is now free to leave the nucleus and head towards the ribosomes in the cytoplasm to make proteins. ...
DNA and PROTEIN SYNTHESIS
DNA and PROTEIN SYNTHESIS

... • Vector –an organism (bacteria or virus) that carries and leaves its genetic material in a host cell. The host then replicates the vector’s genetic ...
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Expanded genetic code



An expanded genetic code is an artificially modified genetic code in which one or more specific codons have been re-allocated to encode an amino acid that is not among the 22 encoded proteinogenic amino acids.The key prerequisites to expand the genetic code are: the non-standard amino acid to encode, an unused codon to adopt, a tRNA that recognises this codon, and a tRNA synthase that recognises only that tRNA and only the non-standard amino acid.Expanding the genetic code is an area of research of synthetic biology, an applied biological discipline whose goal is to engineer living systems for useful purposes. The genetic code expansion enriches the repertoire of useful tools available to science.
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