Chapter 13 Review

9122 Words37 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
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).

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
- 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

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

Which of the following statements is true?

Get Access