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Regulation
Makeup
Trp operons
Lac operons
Eukaryotic Cells
100
regulation of gene expression can be accomplished by controlling this:
What is Activity of a protein product, amount of mRNA that is available, rate of translation of mRNA, and the rate of mRNA degradation
100
Bacterial enzymes that are part of a rarely used catabolic pathwar are usually organized into a:
What is repressible leucine zipper
100
The repressor binds to the operator when:
What is Trp binds to an allosteric site on the repressor
100
How does the lactose repressor block transcription of the lactose operon?
What is by binding to the operator
100
Upstream promoter elements in eukaryotes are:
What is nucleotide sequences that regulate the efficiency of transcription initiation
200
This is the focus of gene regulation in multicellular organisms (4):
What is operons, specificity of products in different tissues, economizing resources at all levels, and rapid turnover of RNA molecules.
200
A repressor protein would have what effect on repressible genes with a negative control mechanism?:
What is turn off transcription in the presence of a corepressor
200
The trp operon is this type of operon: (inducible or repressible)
What is repressible
200
Lactose induces the transcription of the lactose operon by:
What is binding to the allosteric site of the repressor after being converted to allolactose
200
TATA bos is seen in eukaryotic cells as the site where:
What is RNA polymerase binds
300
The molecular switch that controls gene expression is known as:
What is the operator
300
Genes in euchromatic regions are:
What is actively being transcribed
300
Tryptophan is this to the trp operon:
What is a corepressor
300
In the lac operon, cAMP binds to:
What is catabolite activator protein
300
Genes in euchromatic regions are:
What is Actively being transcribed
400
Bacterial gene regulation occurs mainly at this level:
What is transcriptional
400
Upstream promoter elements in eukaryotes are:
What is nucleotide sequences that regulate the efficiency of transcription initiation
400
Excess tryptophan can cause this:
What is tiredness
400
The structural genes (in order) of the lac operon:
What is Z, Y, A
400
DNA sequences that are methylated by a cell are genes that:
What is are inactive
500
Temporal gene regulation refers to this:
What is Certain genes are induced only at a particular point in the life cycle
500
An activator protein would have this effect on an operon with a positivie control mechanism:
What is stimulate transcription when a coactivator is bound to the allosteric site
500
The letters (in order) of the structural genes found in the trp operon
What is E, D, C, B, A
500
The lac operon is what type of operon? (repressible or inducible)
What is inducible
500
Densely staining regions of highly compacted chromatin generally not transcribed:
What is heterochromatin