The coagulase test is used to distinguish which of the following group of bacteria?
A. Streptococcus pyogenes from Enterococcus faecalis
B. Streptococcus pyogenes from Staphylococcus aureus
C. Staphylococcus aureus from Staphylococcus epidermidis
D. Staphylococcus aureus from Streptococcus pneumoniae
Ans: C. Staphylococcus aureus from Staphylococcus epidermidis
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The ecological diversity of phototrophic bacteria is illustrated by the different ________ that allow them to perform photosynthesis in low light environments such as deep in the ocean, in various sediments, and in thick layered mats
A) nitrogen fixation strategies B) bacteriochlorophyll and photosystems C) specialized stalked cells D) endospores and resistant cell types
How may the degradation of telomeres result in cellular aging? What will be an ideal response?
Neurofibrillary tangles occur:a
in the neuron cytoplasm of patients with Alzheimer's disease. b. in the axon of patients with multiple sclerosis. c. in the glial cells of patients with myasthenia gravis. d. in the dendrites of patients with peripheral neuropathy. e. in the cell bodies of patients with depression.
Depolarization of the neuron occurs when
A. the potassium gates open and potassium moves outside the cell. B. the sodium-potassium pump moves potassium inside the cell. C. the sodium-potassium pump moves sodium inside the cell. D. water moves to the outside of the cell and chloride ions follow. E. sodium gates open and sodium moves inside the cell.