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suppose you do a kirby bauer test on a hypothetical staphylococcus species with the antibiotics penicillin and chloramphenicol. you record zone identical diameters of 25mm for the chloramphenicol and penicillin disks. which antibiotic would be more effective against this organism? what does this tell you about comparing zone diameters to each other and the importance of the zone diameter interpretative chart?
Relate the functions of lactose, copper, and tyrosine to how these reagents affected phenotype or gene expression of the bacterial transformants. That is, examine how and why the same bacterial sample may look different on each of the various plates.
Briefly describe this repair mechanism and explain how the mechanism knows which strand to repair.
What changes in the CTD are necessary for recruitment of different proteins at different times during transcription.
What is the difference between impression fossils, index fossils, amber fossils and trace fossils.
The urine of a thirteen year old boy turned dark brown several weeks after a bout with strep throat. The diagnosis was glomerulonephritis.
How does the total number of negative and positive charges change following hydrolysis of the tripeptide?
Describe the event that are invovled in the release of neurotransmitter from nreve endings?
Explain the polymerase chain reaction process. Use terms primer, template, DNA, nucleotides, and DNA polymerase.
What promotes exponential growth? What constrains population development.
Consider a culture into which two E. coli strains are inoculated. Strain A is normal with g=21 min at 37 degrees C, and 42 mins at 27 degrees C. Strain B has a temperature-sensitive mutation, such that g=55 mins at 37 degrees C,
A sample of butterflies contained 50 percent yellow-winged individuals and 50 percent black-winged individuals. In this species, wing color is determined by a single gene with two alleles.
Zebrafish are increased in fish tanks with one family each tank. The mutation spadetail is a recessive lethal. A stock tank for spadetail was made by crossing two carriers.
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