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1.why is it likely that Staphlococcus aureus would be more resistant to plasmoptysis than E. coli?
2.Based on their respective oxygen requirements, in which regions of the thioglycollate tubes do you expect to see growth of Microccocus luteus, Proteus vulgaris, and Clostridium perfringens?
3. How does radiation cause biological harm to bacteria both directly and indirectly? Which organism do you expect to be more resistant to radiation, Bacillus subtilis or Staphlococcus aureus? Why? If you were irradiating Staphlococcus aureus vs. E. coli, which organism would you expect to be more susceptible? Why?
While studying transpiration, a scientist used a dentrometer to record the small daily changes in the diameter of a tree trunk at two differnet heights( 2 meters and 3 meters) above the ground at the same time.
Two highly inbred strains of mice are crossed, and the FI generation has a mean tail length of 5 cm and a standard deviation of 1.5 cm. The F2 generation has a mean tail length of five cm and a standard deviation of four cm.
The DNA Polymerase is an enzyme that accurately replicates your DNA. It has only one active site! Describe how four bases with different geometries can fit into a single active site and how does the enzyme differentiate between the four bases?
The altered tRNA translates the UGA as tryptophan. What nucleotide varies has probably occurred in the mutant tRNA molecule? What consequences will the presence of such a mutant tRNA have for the translation of the normal genes in this cell.
which mode of action of an antiobiotic is least likely to cause side of effects in a ptient.
which of the following would you expect to find in normal urine?
Assume that a spherical cell, with a diameter of 24 ?m, has spherical mitochondria, each with a diameter of 0.24 ?m. If mitochondria occupy 13.7% of the volume of the cell, how many mitochondria are there?
The new antibiotic cubicin works by creating a passive transport channel for H+. Obviously this would affect the PMF, but other cell processes may be disrupted as well. How would treatment with cubicin affect flagellar motility and chemotaxis.
Explain why random union of male and female gametes is necessary for Medelian segregation and independent assortment to occur.
Discuss the three theories about the evolution of multicellularity, giving supportive examples of each. Include in your discussion the strengths and weaknesses of each theory.
Discuss and explain why do you think that molecular evidence often yields an earlier date for a speciation event than fossil evidence?
Does the Y chromosome carry any essential genes? Does the X chromosome carry any essential genes?
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