chapter 17 notes

chapter 17 notes - Chapter 17-From Gene to Protein Part...

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Chapter 17--From Gene to Protein. Part 1--Transcription Read page 309, 312-313 (on the genetic code), 315-316 Problems: 1, 3 We’ll cover this chapter in two parts. This edition of the class notes covers only part 1. For Part 1 you should know: Information flows from DNA to RNA to protein How RNA differs from DNA How the sequence of nucleotides in mRNA is specified Which bases are complimentary between DNA and RNA The sequence of events during transcription What a codon is how to read figure17.5 Why we say that the genetic code is redundant The meaning of: polarity, complementary base pairing, promoter, RNA polymerase, template strand, codon Gene expression--How do we go from DNA to a phenotype? Genes specify proteins by: Transcription: the synthesis of messenger RNA (mRNA) using DNA as a template Translation: synthesis of protein using the mRNA as a template Fig. 17.3 Prokaryotic cell No spatial separation of transcription and translation Immediately transllated Eukaryotic cell Transcription occurs in the nucleus Making the messenger Translation occurs in the cytoplasm Making the protein Information flow: from DNA to RNA to protein
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