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Mannitol Salt Agar, MSA, is used for growing Staphylococcus. The high salt concentration in the medium inhibits the growth of mostother genera. This medium is also useful because the pathogen, Staph. aureus, ferments mannitol and changes agar from redto yellow, while the normal flora, Staph. epidermis, doesnot change the color of medium. Is MSA a differential medium or aselective medium or both or neither? Explain.
How would you explain the fact that many proteins of Archaea resemble their counterparts in eukaryotes more closely than those of bacteria
describe and compare two statistical analysis procedures used in falsification research. how can ststistical analysis be used in historical and observational research?
Thermus aquaticus is a thermophilic bacterium that grows between the temperatures of 50 and 80°C. Although the signal peptide binding groove of its Ffh M domain is lined with hydrophobic groups, only three of them are Met side chains.
An arginine residue (Arg 210) in the matrix-side proton channel of the a subunit of ATP synthase is near the aspartate residue (Asp 61) in the c ring subunit. How might Arg 210 assist proton flow?
What triggers your body to take a breath? Explain what part of the brain stimulates breathing and what aspects of body chemistry are important in controlling the rate and depth of your breathing.
In certain organisms, exposure to a toxin leads to resistance as a result of mutation of the toxin receptor. At the same time, reproductive ability is lost. Explain how a change in the expression of a gene for a toxin receptor could also affect ex..
Carp are freshwater fish that thrive in stagnant-water habitats. The partial pressure of oxygen in stagnant water is low compared to moving water.
What are the dissimilar types of energy we learned about it. Recognize one technique presently being used to alter the genetic makeup of an organism, and explain how humans can advantage from this change.
Which of the following statements is true about bacterial transformation? why?
A population of Hawaiian Drosophilia is segregating two alleles, p1 and p2, of the phosphoglucose isomerase (PGI) gene. In a sample of 500 flies from this population, 26% were p1p1 homozygotes, 62% were p1p2 heterozygotes, and 12% were p2p2 homozy..
A scientist clones a regulatory gene that is involved in controlling the expression of other genes, and discovers that the regulatory gene encodes a histone deacetylase enzyme.
Explain the physiological connections between calcium blood levels and the actions of calcitriol, calcitonin, and parathyroid hormone. What are the dangers if one of these is not working properly? Now consider large number of postmenopausal women tak..
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