unit 3 lect 19 - Lecture 19 Biol 002 3/05/07 Reading:...

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Lecture 19 Biol 002 3/05/07 Reading: Chapter 15: 301-309 Today's topics: Central dogma of gene expression The genetic code Transcription I. The "Central Dogma" of gene expression: ( pages 302-303 ) What is the "central dogma" of gene expression? What is transcription? What is translation? What structures are needed to carry it out? What are the types of RNA and what is the role of each one? II. What is the "genetic code" and how does it work? (pages 304-305 ) Why is a genetic code needed? What is encoded by the "codons" of the code? How was it deduced that the code was in triplets of bases (the bases of nucleotides)? Which molecules carry the genetic code? What is meant by "reading frame" and "frameshift mutation"? How can a DNA molecule encode more than one protein? (how are "starts" and "stops" of proteins encoded?) To practice with how the code works, 1) draw out a hypothetical polypeptide with 5 amino acids and put together a base sequence that could code for this amino-acid sequence
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This note was uploaded on 04/07/2008 for the course PRE MED 101 taught by Professor Bio2,chem24,bio100 during the Winter '08 term at Marquette.

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unit 3 lect 19 - Lecture 19 Biol 002 3/05/07 Reading:...

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