MCDB1A-F2007-christoffersen-part3-4pg

MCDB1A-F2007-christoffersen-part3-4pg - 1 Co In E The...

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Unformatted text preview: 1 Co In E The Eukaryotic Genome and its Expression (Chapt14) Eukaryotic genomes are larger than those of prokaryotes. Much of eukaryotic DNA is noncoding. Eukaryotes have multiple chromosomes. In eukaryotes, transcription and translation are physically separated. Eukaryotes have more complex regulation than prokaryotes. Eukaryotic genomes have more regulatory sequences and more regulatory proteins that bind to them. 868 6 86 86 868 6 86 86 Co In E Table 14.1 A Comparison of Prokaryotic and Eukaryotic Genes and Genomes 878 7 87 87 878 7 87 87 o E Why do eukaryotes have larger genomes? Caenorhabditis elegans , a small nematode, has become a model for multicellular organisms. The genome of C. elegans has been sequenced and contains about 19,000 protein-coding genes. About 3,000 genes in the worm have homologs in yeast. These genes are the ones considered essential to all eukaryotes. Many of the remaining 16,000 genes perform roles related to multicellularity. 888 8 88 88 888 8 88 88 o E Figure 14.1 Eukaryotic mRNA Is transcribed in the nucleus,exportedto the cytoplasm where translation occurs 909 90 90 909 90 90 2 Co In E Figure 14.12 Potential Points for the Regulation of Gene Expression in Eukaryotes 939 3 93 93 939 3 93 93 Co In E Figure 14.14 The Roles of Transcription Factors, Regulators, and Activators (Part 1) 959 5 95 95 959 5 95 95 o E Figure 14.12 The Roles of Transcription Factors, Regulators, and Activators (Part 2) 969 6 96 96 969 6 96 96 o E 989 8 98 98 989 8 98 98 Figure 14.16 Local Remodeling of Chromatin for Transcription 3 Co In E Heterochromatin prevents gene expression Heterochromatin is in found in the inactive X...
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MCDB1A-F2007-christoffersen-part3-4pg - 1 Co In E The...

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