 ribose  Adenine  Uracil  Adenine  Single.

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Presentation transcript:

 ribose

 Adenine  Uracil

 Adenine

 Single

 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

 mRNA

 rRNA

 rRNA and proteins

 Copying genetic info from DNA into RNA

 Initiation  Elongation  Termination

 Ribosomes

 Primary transcription enzyme  Adds complimentary RNA bases to DNA template to build RNA transcripts

 Promoter  Coding sequence  Termination signal

 Promoter – initiation  Coding region – elongation  Termination signal – termination

 Marks the beginning of a gene  Where RNA pol binds to start tscn

 The promoter

 It opens  Transcription bubble or puff

 no

 RNA pol adds RNA nt to build transcripts

 template

 5’ to 3’

 3’ to 5’

 Coding strand

 Marks the end of the DNA that’s being transcribed

 transcripts

 All 3 kinds!

 Pre-mRNA

 Processing! ◦ Capping ◦ Splicing

 splicing

 Introns  Introns intervene or interfere

 Exons  Exons are expressed

 Into the cytoplasm to the ribosomes for translation

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