Which process involves antibodies covering surface receptors on a virus or toxin molecule, thereby disrupting their activity?
A. Neutralization
B. Opsonization
C. Complement fixation
D. Agglutination
E. Anamnestic response
Answer: A
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Together, the bean bugs and the bacteria living within their gut would be considered a(n)
a. organism. b. population. c. community. d. ecosystem
The application of __________ substitutes for low temperature or light requirements for biennial
germination. a. indoleacetic acid b. indolebutyric acid c. naphthaleneacetic acid d. gibberellins e. ethephon
In an aqueous environment, how are the phospholipids of a membrane arranged?
a. in a single layer b. in a bilayer, with the fatty acid tails located at the surface c. in a bilayer, but the phospholipids have no specific orientation d. in a bilayer, with the polar heads of each layer located at the surface
Why is it entirely possible for a pathogen to appear susceptible in susceptibility testing and resistant in a real-life context?
A) A person's liver may break down the drug before it even begins to benefit the patient. B) Bacterial levels and active drug concentrations vary from one tissue to another in an active infection. C) An active infection is more likely to mutate due to the larger population. D) The ability of the pathogen to live as part of a biofilm and benefit from the protection of other bacteria does not exist in susceptibility tests. E) A real-life infection allows for the possibility of genetic crossover with different bacteria, whereas tests in the lab are focused on studying a single strain of bacteria.