CHAPTER 10 - GENE EXPRESSION AND REGULATION

CHAPTER 10 - GENE EXPRESSION AND REGULATION - CHAPTER 10 -...

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Genes determine protein structure Protein Structure determines the way the processes of life are carried out. How does DNA determine physical characteristics? Double stranded Deoxyribose A - T; C- G Recipe DNA Single stranded Ribose A - U; C - G Function based on type (three types) RNA DNA versus RNA mRNA - codes of AA sequence in protein (messenger RNA) rRNA - part of ribosomes (ribsome RNA) tRNA - carriers specific AA to a ribosome Types of RNA DNA is transcribed into RNA RNA is translated into protein Information flow in a cell: How is information in a gene transcribed into RNA? Ribosome o tRNA o mRNA o Amino acids o Requirements New mRNA outside the cytoplasm Small ribosome subunit attaches to methionine and lrg ribosomal subunit covers it Intiation o Old ribosomes stuck to mRNA slides along and adds amino acids along the way Elongation o Stop codon: no tRNA comes in. Factory is destroyed
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CHAPTER 10 - GENE EXPRESSION AND REGULATION - CHAPTER 10 -...

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