Chapter 13 Review
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
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6
Unmethylated CpG islands are correlated with inactive genes.
false 7
Loosely packed chromatin is said to be in an open conformation.
true 8
MicroRNAs increase the rate of mRNA translation.
false 9
The ability of cells to control their level of gene expression is called
gene regulation 10
Some genes such as that for β-actin are expressed at relatively constant levels in tissues regardless of variations in the animal's condition. What do we call this type of gene?
constitutive gene 11
Liver cells, mammary cells, and skin cells all contain the same genome; however, their respective proteomes vary drastically. This observation is best explained by what phenomenon?
cell differentiation 12
Which of the following are points of control for gene expression in eukaryotes?
all choices correct 13
What type of regulatory transcription factor binds DNA and increases the transcription of a gene?
an activator exerting positive control 14
Why is the operon arrangement of genes beneficial to certain bacteria?
it allows the coordinated regulation of a group of genes that encode proteins with a common function.
15
An mRNA that contains the
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 genes.
false 7
Loosely packed chromatin is said to be in an open conformation.
true 8
MicroRNAs increase the rate of mRNA translation.
false 9
The ability of cells to control their level of gene expression is called
gene regulation 10
Some genes such as that for β-actin are expressed at relatively constant levels in tissues regardless of variations in the animal's condition. What do we call this type of gene?
constitutive gene 11
Liver cells, mammary cells, and skin cells all contain the same genome; however, their respective proteomes vary drastically. This observation is best explained by what phenomenon?
cell differentiation 12
Which of the following are points of control for gene expression in eukaryotes?
all choices correct 13
What type of regulatory transcription factor binds DNA and increases the transcription of a gene?
an activator exerting positive control 14
Why is the operon arrangement of genes beneficial to certain bacteria?
it allows the coordinated regulation of a group of genes that encode proteins with a common function.
15
An mRNA that contains the