Microbiology Practice Quiz: Symbiosis and Disease

Nitrogenase is
made by plants to fix nitrogen
made by bacteriods to limit oxygen in the nodules
made by plants and limits oxygen in the nodules
made by bacteriods to fix nitrogen
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Terms in this set (11)
Nitrogenase is
made by plants to fix nitrogen
made by bacteriods to limit oxygen in the nodules
made by plants and limits oxygen in the nodules
made by bacteriods to fix nitrogen
made by bacteriods to fix nitrogen
Lipopolysaccharides (LPS) can cause septic shock in humans. Where do bacteria have LPS?
in the cytoplasm
in the plasma membrane
in the peptidoglycan
in the outer membrane
in the outer membrane
Which statement is not one of Koch's postulates?
The microorganism taken from the diseased host can be grown in pure culture.
A sample of the pure culture of the microorganism produces the disease when it is innoculated into an uninfected host.
The microorganism is always transmitted by insect vectors.
A host infected by the cultured microorganism yields a new culture of the microorganism identical to the original culture.
The microorganism is always transmitted by insect vectors.
During nodulation, what would happen if nitrogenase wasn't made?
Root hair thread wouldn't form
There would be high levels of oxygen in the nodule
The bacteria wouldn't differentiate into bacteriods qq
Nitrogen fixation wouldn't occur
unsure
When squid hatch, they are rapidly colonized in the light organ by the bioluminescent Vibrio fischeri. This relationship is an example of
commensalism
mutualistic symbiosis
parasitic symbiosis
all of the above
mutualistic symbiosis
Exotoxins are
DNA
Lipids
RNA
Proteins
Proteins
Which is induced or caused by exotoxins?
Salmonella
Cholera
Mycoplasmosis
Denitrification
Cholera
An important set of criteria to determine if a disease is the result of an infection is called
Ehrlich's optimal law.
Occam's razor.
Koch's postulates.
Darwin's law of evolution by natural selection
Koch's postulates.
During nodulation, what would happen if leghemoglobin wasn't made?
Root hair thread wouldn't form
There would be high levels of oxygen in the nodule
The bacteria couldn't differentiate to bacteroids
Nitrogen fixation couldn't occur
Nitrogen fixation couldn't occur
There would be high levels of oxygen in the nodule
Endotoxin is part of
Gram positive bacteria
Gram negative bacteria
Archaea
Protists
Gram-negative bacteria
Members of the genus Rhizobium that live in plant roots can perform photosynthesis bioluminesce produce microbial rhodopsinx fix nitrogenfix nitrogen