Recitation 9 Ekaryotes Double stranded linear Prokaryotes Double stranded circular Viruses Double stranded or single stranded can be DNA or RNA Transcription DNA RNA Pyramidines Cytosine Thymidine Uridine Happens in eukaryotes and sometimes in viuses 1 5 mG Cap Purines Adenosine Guanosin 2 3 Poly A Tail 3 Splicing Can include multiple reading frames that produce different proteins from the same mRNA Enzyme Ribosome RNA catalized reaction Starts at the start codon ATG which encodes MET Polycistronic multiple proteins in 1 nal mRNA Translations mRNA Viruses Mutations Missense one nucleotide is affected point mutation Could change one amino acid Deletion Insertion shifts the entire frame frame shift Least affect at the end Nonsense Stop codon Protein is shortened Silent change in the nucleaotide secuence but it is the same amino acid Does not affect the protein
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