Chapter 13 Review

9122 WordsDec 8, 201237 Pages
When lactose becomes available the genes encoding β-galactosidase and lactose permease are upregulated in E. coli. true 2 Different globin polypeptides are expressed at similar levels during the embryonic and fetal stages of mammalian development. false 3 RNA polymerase can bind to the promoter region of the DNA even when the lac repressor is bound to the operator site. true Hide 4 Both eukaryotes and prokaryotes require a promoter region for gene transcription. true 5 Eukaryotic genes are almost always organized in groups, similar to operons in prokaryotes. false Advertisement Hide ads ($1). 6 Unmethylated CpG islands are correlated with inactive…show more content…
Transcriptional start site : where transcription beings 2. TATA box : 25 base pairs, determines precise starting point for transcription 3. Response elements: where regulatory proteins bind 51 3 types of proteins that are needed for basal transcription at the core promoter: RNA pol II 5 general transcription factors mediator 52 Glucocorticoid - activates transcription of specific genes - hormone released into bloodstream after meals - into cytosol - releases proteins called chaperones and exposes NLS - Directs receptor to travel into nucleus 53 Domains or portions of domains with similar structures in different proteins motif 54 DNA methylation - attaches methyl groups - usually inhibits transcripiton 55 2 ways Methylation can inhibit transcription 1. Methy. of CpG islands prevents an activator form binding 2. Convert chromatin form open to closed 56 DNA methylation is associated with transcriptional repression. 57 In eukaryotes, the most common nucleotide to be methylated is CYTOSINE 58 Which of the following statements is true? In
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