Neisseria is distinguished from many other Gram-negative pathogens by being (catalase/oxidase/dismutase) positive
What will be an ideal response?
oxidase
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The activated sludge process
A. is used during secondary treatment of sewage. B. is meant to convert inorganic to organic matter. C. is meant to increase the BOD. D. removes large objects from the sewage. E. is meant to convert inorganic to organic matter AND is meant to increase the BOD.
The largest cells in the vascular bundles are
a. sieve tubes. b. sclereids. c. vessel members. d. companion cells. e. parenchyma.
Which cells in our body possess the MHC II protein?
A. Thymus cells B. Neurons C. Macrophages D. Nasal epithelial cells E. Erythrocytes
Clostridium perfringens food poisoning leads to diarrhea, because the
A) toxin causes the shedding of the intestinal lining. B) permeability of the intestinal epithelium is altered by the toxin it produces. C) disease causes such extreme thirst that the patient drinks more water than can be absorbed. D) organism multiplies more rapidly than the immune system can handle.