Quiz 7 Questions Flashcards
You are examining a bacterial protein associated with glucose catabolism. You would expect expression of the gene coding for this protein to be…
induced by glucose
You are examining a protein associated with cysteine biosynthesis. You would expect expression of the gene coding for this protein to be…
repressed by cysteine
A bacterium that has a mutation that eliminated the lac i gene product would…
express lacZYA constitutively
&The genes of the lac operon code for proteins associated with lactose metabolism. Which of the lac gene products is associated with the transport of lactose into the cell?
galactosidase permeate
Which of the following is an example of translational regulation?
Protein degradation
DNA splicing
Protein folding
mRNA degradation
DNA methylation
mRNA degradation
In eukaryotic cells, which genetic elements can prevent the increase in gene expression that results from the presence of an enhancer sequence?
insulator
In eukaryotes, post-transcriptional control of gene regulation may involve…
Alternative mRNA splicing, control of nuclear export, DNA methylation
A DNA element that decreases transcription of a gene from 50 kilobases away on the chromosome is known as a…
silencer
Within a genome, an enhancer may be located…
up or downstream of the gene enhanced
A eukaryotic gene is observed to make multiple forms of a protein. How can one eukaryotic gene produce multiple products in the same cell?
Alternative splicing sites can lead to the production of two different mature mRNAs from the same gene, resulting in slightly different proteins
The iron-response element IRE is a
sequences in certain mRNAs that bind proteins dependent on iron
Protein phosphorylation, protein folding, and proteolytic cleavage are all examples of
post-translational control of the control of the gene expression and activity
When discussing the role of genomic CpG sites in DNA methylation: What effect does DNA methylation have on gene expression?
DNA methylation causes condensation of chromatin, inhibiting gene expression.
