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Question: Assume you have 2 tubes containing cultures of genetically distinct bacterial strains. You know that when you mix the two together, you get Horizontal gene transfer (HGT), but you do not know what genetic exchange mechanism is accomplishing this transfer. Prior to mixing the strains, you add an enzyme that degrades any DNA it comes into contact with the tubes and allow it to incubate briefly. You then mix contents of both tubes together and find that you are no longer able to achieve HGT. Both cultures are still completely viable. Name the 3 methods of HGT that we discussed in class. Which of these is the MOST likely process you interfered with? In your answer, explain your observations and why the other two processes are not likely to be involved.
What is the biochemical pathway that corresponds to duplicate dominant epistasis in genetics? There is a 15:1 ratio of phenotypes, there are two genes involved: A and B. but what is biochemical pathway that causes this ratio to form.
You have two enzymes, 1 and 2. Both convert substance A into substance B. 1 is inhibited by B, because B partially blocks the active site and will not permit more A to enter.
Determine which types of cells can we derive continuous cell lines? From which types of cells can we? Derive finite cell lines? From which types of cells do we derive mature differentiated cells?
Explain the methods of neurotansmitter removal from a synapse and the state the signifiance of this action?
In the fruit fly, the wild type purple eye color is produced through a combination of brown xanthommatin and bright-red drosopterin pigments.
Offer a model to explain how the F-box protein SLF and the S-RNase mediate self incompatibility. Be sure to account for the action of these proteins in compatible and incompatible interactions.
A person is heterozygous for a mutation in a STAT gene replaces a tyrosine in coding sequence with a phenylalanine. The missing tyrosine is normally phosphorylated by a JAK bound to a cytokine receptor.
Barbara McClintock, famous for discovering that genes might move within genomes, had her meticulous work ignored for nearly 4 decades, but eventually won the Nobel Prize. Why was her work so distrusted.
After contact with a patient spinal fluid a lab technician develop fever nausea and purple lessions on her neck and extremities. A throat culture grew gram negative diplococci. What is genus of the bacteria.
An organism of the genotype AaBbCc was testcrossed to triply recessive organism. The genotypes of the progeny are presented in the following table.
define how this cell would be activated the cellular and molecular interaction(s), and the various steps and factors leading to an appropriate immune response to clear the toxin.
define a genetic cross between two sufferers
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