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Suppose that an animal that has a system similar to ABO blood types in humans.  The ABO part is the same. In addition, they have a second independent gene that creates a mimic A protein, with alleles M ( a dominant allele that makes this A- minic protein) and a m […]

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? Would there be a greater effect on the import of aspartate or […]

Of the four chambers of the human heart, which has the thickest walls, and why? Why can you not catch the same cold twice, but a new cold will make you sick for a week or two? What is the key step in spermatogenesis that allows for unlimited sperm production? This step is not present in oogenesis, and therefore only a finite number of eggs could be produced. What is the […]

Question: Not realizing the severity of the infection and that he/she should use intravenous dual-drug antimicrobial therapy, the doctor prescribes only oral doxycycline (a type of tetracycline antibiotic) and sends you home. By this time, 35 cells of V. vulnificus have gotten into your blood. However, the doxycycline does slow the […]