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ribose
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Adenine Uracil
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Adenine
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Single
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mRNA – single stranded chain; takes message from DNA to ribosomes rRNA – globular with proteins; makes up ribosomes tRNA – hairpin or cloverleaf; transfers aa to ribosomes
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mRNA
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rRNA
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rRNA and proteins
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Copying genetic info from DNA into RNA
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Initiation Elongation Termination
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Ribosomes
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Primary transcription enzyme Adds complimentary RNA bases to DNA template to build RNA transcripts
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Promoter Coding sequence Termination signal
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Promoter – initiation Coding region – elongation Termination signal – termination
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Marks the beginning of a gene Where RNA pol binds to start tscn
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The promoter
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It opens Transcription bubble or puff
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no
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RNA pol adds RNA nt to build transcripts
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template
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5’ to 3’
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3’ to 5’
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Coding strand
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Marks the end of the DNA that’s being transcribed
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transcripts
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All 3 kinds!
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Pre-mRNA
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Processing! ◦ Capping ◦ Splicing
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splicing
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Introns Introns intervene or interfere
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Exons Exons are expressed
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Into the cytoplasm to the ribosomes for translation
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