14 DNA to proteins

14 DNA to proteins - From DNA to Proteins Chapter 14...

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From DNA to Proteins Chapter 14
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Marvelous Mussel Adhesive Mussel binds itself to rocks with threads coated with the protein bysuss Gene for bysuss has been put into yeast Yeast synthesize the protein based on the instructions in the mussel DNA
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Same two steps produce all proteins: 1) DNA is transcribed to form RNA Occurs in the nucleus RNA moves into cytoplasm 2) RNA is translated to form polypeptide chains, which fold to form proteins Steps from DNA to Proteins
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Three Classes of RNAs Messenger RNA Carries protein-building instruction Ribosomal RNA Major component of ribosomes Transfer RNA Delivers amino acids to ribosomes
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A Nucleotide Subunit of RNA phosphate group sugar (ribose) uracil (base) Figure 14.2 Page 228
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Base Pairing during Transcription DNA DNA DNA RNA G C A T C G T A G C A U C G T A base pairing in DNA replication base pairing in transcription
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Transcription & DNA Replication Like DNA replication Nucleotides added in 5’ to 3’ direction Unlike DNA replication Only small stretch is template RNA polymerase catalyzes nucleotide addition Product is a single strand of RNA
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14 DNA to proteins - From DNA to Proteins Chapter 14...

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