Create a diagram illustrating how neurotransmission can lead to changes in gene expression, using the activation...
DNA does not code for lipids. In spite of this, gene activation can lead to a change in the fluidity of plasma membranes as an organism acclimatizes to a drop in temperature. Explain how this is possible.
10. Using the lactose operon as an example, diagram and explain gene expression through the action of a promoter, an operator, structural genes, and a repressor protein when lactose is present and when lactose is absent. 11. Define and give examples of epigenetic control of gene expression.
In contrast to histone acetylation, which always correlates with gene activation, histone methylation can lead to either transcriptional activation or repression. How do you suppose that the same modification - methylation - can mediate different biological outcomes? Explain what is meant when we say two DNA sequences are 'highly conserved'. Why are some sequences conserved and others aren't? In your own words, explain what is meant by "position effect". What is the molecular basis of this phenomenon?
1. Using the example genetic strains in this exercise draw a diagram illustrating two bacteria conjugating. Label the F strain, the F- strain, the direction of movement for DNA, and the location of the ampicillin resistant gene and the streptomycin resistant gene. CONTROLS Ampicillin Streptomycin Control CONJUGATION S & A Plate Conjugation Figure 14.1 Conjugation Experiment
Diagram the activation of the 5-HT Serotonin Receptor (G-Protein Coupled Receptor) leading to transcriptional activation in a neuron. Include signaling pathways you have learned about in lecture or in your reading that involve G-Protein Coupled Receptors and lead to gene activation. Demonstrate how Lithium acts to disrupt one of these signaling pathways.
Diagram the activation of the 5-HT Serotonin Receptor (G-Protein Coupled Receptor) leading to transcriptional activation in a neuron. Include signaling pathways you have learned about in lecture or in your reading that involve G- Protein Coupled Receptors and lead to gene activation. Demonstrate how Lithium acts to disrupt one of these signaling pathways. (20 points) 5.
Which of the following changes to DNA can be part of epigenetic regulation of gene expression? Choose both correct answers. degradation of mRNA that is no longer needed methylation of DNA acetylation alternate mRNA splicing
How can you generate a mouse that expresses a gene on demand as an adult mouse. none of the above using a tissue specific promotor to drive expression of a tetracycline response element and ubiquitous promotor to control expression of the gene of interest with lots of training using a tissue specific promotor to drive expression of a tetracycline reregulatory protein and a tetracycline response element to control expression of the gene of interest that is driven by a ubiquitous...
Changes in protein expression can alter gene function since: High levels of protein mean that the protein can sustain mutations more readily without any harm to the cell. The cell responds only to high levels of protein. Changes in expression can alter regulatory networks. Low levels of protein mean that the protein can sustain mutations more readily without any harm to the cell. The mutations found in the CF gene that result in cystic fibrosis are recessive because: The CF...
How do transcription factors affect gene expression? a.) They are molecules that can turn genes on or off. b.) They are mRNAs that contain extra information that is not part of the DNA genome. c.)They modify the chromosome structure to create mutations. d.) They are signals that tell cells whether to divide or not.