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Question: The hypothetical OxyA protein is a surface protein that may have a role in attachment to the surface of the intestinal epithelium but there is evidence that it has a role in invasion. Assume there is a suitable mouse model and that attachment can be demonstrated using human cell culture lines. Describe how you would use a molecular version of Koch's postulates to support the hypothesis that the OxyA protein is a virulence factor. Be sure to describe what kind of results you would expect for each step in the process.
Question: Write the structural formula for isoamyl alcohol.
Richard does not know it, but he has an aneurysm at the base of his left middle cerebral artery. One of Richard favorite activities is to take a hot sauna bath and then jump into cold water.
How the cell overcomes misfolded soluble or secretory proteins in the RER by exporting the misfolded proteins out of the RER into the cytosol, where they are degraded in the proteasome.
Discuss the main mechanism involved in auxin’s ability to stimulate cell elongation? Identify another important plant response that employs the same mechanism.
The habitat of one species of tropical fish is red coral reefs. The large majority of the fish in this population are red. A few individual fish carry a mutation that prevents the production of the red pigment.
Birds and mammals have a four-chambered heart, with two ventricles and two atria, but other modern reptiles have a three-chambered heart, with just one ventricle. Paleontologists debate whether dinosaurs had a typical "reptile-like" heart or a "birdl..
Several times, pathogens in foods occur in low numbers and are mixed in with many non-pathogens. What did you learn about in.
The area where the urethra exits the bladder is surrounded by a thickened layer of smooth muscle known as the bladder neck. Male infertility can be caused through various situations.
Think about a population in which the frequency of allele A is p=0.7 and the frequency of allele a is q=0.3, and where the alleles are codominant.
Discuss how does the concept of natural selection explain variations in species descended from a common ancestor?
An analyzer has two true breeding lines of rabbits, both of which are albino. Albinism is recessive in both lines. When the researcher crosses the rabbits,
A particular variety of corn has a gene for kernel color and a gene for height with the phenotypes CC,Cc: purple kernel.
After phagocytosis of a pathogen, the phagosome becomes very acidic with the pH dropping to between 3.5 and four. However, some of the enzymes are important to kill pathogens only work when the pH is higher than five.
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