Lithotrophy: Inorganic e- Donors
What will be an ideal response?
•Microbes can use inorganic compounds as e- donors (all animals can't!).
•Example: Iron oxidation.
•Ex: Fe2+ = e- donor & O2 = e- acceptor.
•E0' = 820 - 770 = 110 mV.
•Generally lower energy yields than organotrophy, but still sufficient for microbial growth.
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Compared to humoral immunity, cell-mediated immunity is more likely to defend against which of the following?
A) virally infected cells only B) transplanted tissue only C) cancer cells only D) both virally-infected cells and cancer cells E) virally-infected cells, cancer cells, and transplanted tissue
What enzyme is not found in Staphylococcus epidermis but is found in Staphylococcus aureus?
A. peroxidase B. catalase C. lysozyme D. coagulase E. lipase
Drug-resistant populations of microbes arise when
A) exposure to drugs selectively kills sensitive cells, allowing overgrowth of resistant cells. B) exposure to drugs causes mutations that produce resistance. C) resistant cells become numerous in a population due to their greater vigor. D) the patient becomes immune to the drug. E) synergy between medications occurs.
The normal microbiota compete with pathogens in a variety of ways to protect the body, creating a situation known as microbial (antagonism/competition/resistance)
What will be an ideal response?