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Q 1. E.coli and S.epidermidis were chosen to represent Gram-negative and Gram-positive bacteria, respectively. For a given antibiotic, is there a difference in susceptibility between the Gram-positive and Gram-negative bacteria? If so, what difference(s) do you see?
Q 2. Suppose you do this test on a hypothetical Staphylococcus species with the antibiotics penicillin (P-10) and chloramphenicol (C30). You record zone identical diameters of 25 mm 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 interpretive chart?
Q 3. How does the antibiotic get from the disk into the agar?
Compared to a carbon atom with only single covalent bonds, a carbon with a double bond 1 Shares fewer electron pairs with other atoms two Is more flexible in the spatial arrangement.
DNA is isolated from two different species. Both DNA samples are found to be exactly the same size. One of the DNA samples has a G+C/A+T ratio of 4.8 and the other 3.2.
liquid portion of blood is known as ______. Most of the plasma comprises of ______ that serves as a solvent and carries heat. ______ like sodium, potassium and ______ serve to manage the osmotic balance in the blood.
Assume you are analyzing two laboratory populations of pure-breeding mice. One population has very long tails and the other has very short tails.
Water at room temperature is placed in flask connected through rubber tubing to a vacuum pump and the pump is turned on.
Briefly explain why hydrogen bonds and salt bridges do not contribute much to protein stability at room temperature.
What are some examples of chromosome deletions that have been documented in humans?Find out examples of how chromosomal inversion.
Protein transport into the endoplasmic reticulum or mitochondria needs unfolding the protein and threading the amino acid chain through a channel or pore into organelle.
2-mutant, colorless strains of the (fictitious) haploid fungus Cyanomyces are crossed. The progeny consists of 50% wild-type and 50 percent mutant spores.
Assume that two QTL affect the weight of a dog breed. Each locus has two alleles such that each dose of the "2" form of an allele adds 5 pounds to the base weight of 60 pounds,
In examining a picture of the cell taken with an electron microscope, a student observes that the cell has a nucleus and a cell membrane but not a cell wall. The student can accurately conclude that the cell is a what.
As you continue on in your career, you become keenly interested in the mechanisms of immune cell recruitment during the innate immune response.
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