The growth rate of phototrophic purple bacterium Rhodobacter is twice as fast when the organism is grown phototrophically in a medium with malate as a carbon source as when it is growth with CO2 as a carbon source (with H2 as electron donor). Discuss reasons why and list the nutritional class of Rhobacter when growing under each ...continues
Absorption Spectrum of Pigments
Compare and contrast the absorption spectrum of pigments of Cyanobacterium vs. the various purple bacteria. What wavelengths are preferentially absorbed by the pigments of each group of bacteria & how do the absorption properties of these molecules compare with the regions of the spectrum visible to our eye? How do they explain ...continues
Using the phylogenetic tree in the attached document as a guide, discuss why bacteriophodopsin was likely a late evolutionary invention.
DNA Replication and Bacterial Infections
Ciprofloxacin, erythromycin, and acyclovir are used to treat microbial infections. Ciprofloxacin inhibits DNA gyrase. Erythromycin binds in front of the A site on the 50S subunit of a ribosome. Acyclovir is a guanine analog. What steps in protein synthesis are inhibited by each drug? Which drug is more effective against ba ...continues
Design the vaccinia virus to make vaccine against AIDS
Hello: I am studying genetics in my microbiology class. Each week we are given a series of questions that are supposed to help our understanding of the topics. We are not required to do them, but it's a good idea to do so because they become great study tools at exam time and it reinforces learning. Thank you. However, I ...continues
What are the causes of influenza virus epidemic and pandemics?
Influenza virus causes both epidemics every few years, and pandemics every few decades. This section describes how the changes in the virus are responsible for generating epidemics and pandemics.
Koch's Postulates and Molecular Genetics
I understand that Koch's postulates have limitations, but I don't understand how that plays a role in molecular genetics. Here is my question. Given the limitations of Koch's postulates, what role do you see for molecular genetics and associated techniques in addressing the exceptions to the postulates?
