Question: It is January and the starting of a new semester. Just as you get settled in to your new routine, you begin to notice that illness is spreading across campus and other students in your classes are so sick they do not come to virology class. People are saying that […]

1-In normal cells an RTK receptor that binds to epidermal growth factor is present. When EGF is present in the extracellular space it binds to the receptor and initiates an RTK signal transduction cascade that ultimately tells the cell to undergo mitosis. Describe what would happen to cell division if […]

Here is this week’s essay question: NOAA vs. NASA Recently NASA began the Mars Science Laboratory mission in a multifaceted scientific project geared towards understanding the history of Mars geology.  Meanwhile the Earth’s ocean remains largely unexplored. If you were testifying before Congress as the head of NOAA or NASA […]

Assume you infected an E. coli culture with a virulent bacteriophage. Most of the cells lysed, but a few survived – 1×10^-4. You wonder where the resistant bacteria came from. Were they caused by the bacteriophage infection or did they already exist in the bacterial culture? Earlier, for a different […]