Chapter 10 Fall 2007 Lecture 0Notes

Chapter 10 Fall 2007 Lecture 0Notes - How is Genetic...

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1 all cells in body- same DNA blood cells neurons (brain cells) skin cells How is Genetic information Used? DNA mRNA PROTEIN tRNA rRNA other RNAs Gene Expression messenger transfer ribosomal URACIL (U) base with a single-ring structure phosphate group sugar (ribose) Nucleotides in RNA other bases same as in DNA Fig. 10.1 DNA DNA DNA RNA base pairing during DNA base pairing during Transcription complementary base pairing Fig. 10.1
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2 Fig. 10.2 part of the sequence of base-pairs (blue) RNA polymerase Transcription newly forming RNA transcript DNA template unwinding DNA template winding up DNA template at selected transcription site Transcription Transcription Transcription
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3 DNA mRNA TRANSCRIPTION translation tRNA rRNA other RNAs Gene Expression messenger transfer ribosomal Fig. 10.3 Eukaryotes transcribe & modify mRNA mature mRNA transcript 5’ 3’ 3’ poly-A tail 5’ snipped out snipped out transcription into pre-mRNA unit of transcription in a DNA strand exon intron exon exon intron 3’ 5’ cap DNA mRNA
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Chapter 10 Fall 2007 Lecture 0Notes - How is Genetic...

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