Which of the following toxins produced by Bordetella pertussis results in the accumulation of excess mucus in the trachea?
A) pertussis toxin
B) adenylate cyclase toxin
C) tracheal cytotoxin
D) both adenylate cyclase toxin and tracheal cytotoxin
E) both pertussis toxin and adenylate cyclase toxin
E
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Members of the genus Thiothrix are sheathed bacteria that can replicate by releasing gonidia from the open end of the sheath.
Answer the following statement true (T) or false (F)
Which of the following scientists is considered to be the “Father of Chemotherapy”?
A) Alexander Fleming B) Paul Ehrlich C) Selman Waksman D) Sir Howard Walter Florey
In arid terrestrial environments, salt can accumulate in the soil because of
A. the selective uptake of water by plants. B. the activities of grazing animals. C. the precipitation of salt from dry air. D. the secretion of salt by plants. E. the settlement and evaporation of water.
The activities by which cells acquire and process energy are collectively called:
a. organic chemistry b. biochemistry c. condensation d. hydrolysis e. metabolism