John Snow's research during a cholera outbreak in London laid the foundation for which of the following branches of microbiology?
A) infection control only
B) epidemiology only
C) immunology only
D) both infection control and epidemiology
E) infection control, epidemiology, and immunology
D
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Because bacterial LPS is both hydrophilic and hydrophobic, a specialized transporting system, ________, is required for membrane transport and insertion.
A. Tol B. Lpt C. cytidine diphosphate carrier protein D. acyl-carrier protein
Which type of cell would probably provide the best opportunity to study lysosomes?
a. muscle cell d. leaf cell of a plant b. nerve cell e. bacterial cell c. phagocytic white blood cell
The flow of energy in the biosphere begins primarily with
A) chemotrophs. B) phototrophs. C) lightning. D) oxidized chemicals. E) high-energy electrons.
Nitrogen cycling includes __________ of N2.
a) denitrification b) ammonification c) fixation d) nitrification