BIOS41_Lecture9_02012008

BIOS41_Lecture9_02012008 - 07_14_exons_introns.jpg...

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BIOS 41 Biology Core I: Cellular and Molecular Spring 2008 Professor J. A. Sands Lecture 9, February 1 RNA Synthesis (Chapter 7, pages 229-243).
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07_03_RNA _v_DNA.jpg How RNA differs from DNA.
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07_09_1_bacterial gene.jpg Transcription of a bacterial gene.
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07_10_transcr_DNA.jpg For any given gene, one of the two DNA strands is the template .
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07_12_capping.jpg Eucaryotic mRNAs get modified by capping at 5’end and polyadenylation at 3’ end.
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07_13_Eucar_v_bact.jpg Eucaryotic genes have non-coding regions, “introns”.
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Unformatted text preview: 07_14_exons_introns.jpg Eucaryotic genes vary in size and number of introns. 07_15_end_intron.jpg Special nucleotide sequences signal the beginning and end of an intron . Exons get “spliced” together. 07_16_RNA_chain .jpg Introns are removed in the form of a lariat. 07_18_a_tropomyo.jpg Transcripts from many genes can get spliced in alternative ways. 07_20_Pro_v_Eucar.jpg Review of how procaryotes and eucaryotes handle their RNA transcripts....
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This note was uploaded on 04/19/2008 for the course BIOS 41 taught by Professor Sands during the Spring '08 term at Lehigh University .

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BIOS41_Lecture9_02012008 - 07_14_exons_introns.jpg...

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