Figure 10.7 DNA molecule Gene 1 Gene 2 Gene 3 A Transcription RNA TranslationCodon Polypeptide Amino acid AAC C GG C AAAA UU GGCCG UUUU DNA U
Figure 10.8B_s3 T Strand to be transcribed A C T TC A A A A A T DNA AA T C T T T T GAG G RNA Transcription AAAA U U U U U G G G Translation Polypeptide MetLysPhe Stop codon Start codon RNA is complementary to ONE DNA strand!
Figure 10.9B_1 RNA polymerase DNA of gene Promoter DNA Initiation 1 Terminator DNA Promoter = DNA sequence that marks beginning of gene RNA Polymerase binds DNA at promoter and transcription begins
Figure 10.9B_2 2 Elongation Growing RNA RNA Polymerase synthesizes RNA using ONE DNA strand as a template.
RNA polymerase Free RNA nucleotides Template strand of DNA Newly made RNA Direction of transcription T G A G G A A U C CA C T T A A C C G G U T U T A ACC T A T C Note: RNA synthesized using base pair rules!! (A-U and G-C) Only ONE strand of DNA is ‘read’!
Termination RNA polymerase Completed RNA 3 Growing RNA Transcription STOPS at terminator -- RNA polymerase detaches from DNA. Terminator = DNA sequence that marks end of gene
Figure 10.10 DNA Cap Exon IntronExon RNA transcript with cap and tail ExonIntron Transcription Addition of cap and tail Introns removed Tail Exons spliced together Coding sequence NUCLEUS CYTOPLASM mRNA