In order to work best, enzymes ____.
A. always need coenzymes
B. randomly grab surrounding molecules
C. need low pH
D. need high temperatures
E. need set environmental conditions, specific for each enzyme
Answer: E
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The nerves that carry information to the central nervous system (CNS) are termed
A. motor nerves. B. endocrine nerves. C. sensory nerves. D. cerebrospinal nerves.
How do fibrinolysins enhance a pathogen's virulence?
A) They destroy the molecules that hold cells together. B) They break down fibrin proteins that are involved in clot formation, allowing the cells to penetrate deep into damaged skin. C) They destroy the fibers that are found at the base of superficial tissues, allowing for deeper penetration by the pathogen.
Sporulation generally occurs under which of the following circumstances?
A) when conditions are unfavorable or there are insufficient nutrients B) when microbes are exposed to a new, favorable environment C) when microbes are under little stress and can become dormant D) when resources become highly abundant
A distinctive feature of spirochetes is the presence of
A. endoflagella. B. nucleosomes. C. fimbriae. D. variable surface antigens. E. helically arranged pili.