Which of the following is NOT true regarding the complement system?
a. Activated components of this system adhere to bacterial cell walls and then put holes in these cell walls.
b. This system involves a group of at least 20 proteins found in the blood plasma.
c. During an infection, one protein in this system activates the next in a cascade of reactions.
d. Some components of this system stimulate eosinophils to release histamine.
e. Some components of this system stick to the walls of bacterial cells, marking them for phagocytosis.
Ans: d. Some components of this system stimulate eosinophils to release histamine.
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If you were describing to a class of nursing students how the polio vaccine, which contains inactivated virus, works
A. introduce antibodies into a person. B. create immunological memory without causing disease. C. introduce synthetic drugs, like sulfa drugs, into a person. D. give a person a mild disease. E. stimulate the production of blood platelets.
A soldier ant dies defending the ant colony from invading termites. Which term best describes this event?
a. suprachiasmatic protection b. sociobiology c. ultimate cause d. inclusive fitness
e. altruismHow or where do most transcription regulators bind?
a. to the major groove of RNA b. as dimers c. to the minor groove of DNA d. to a DNA sequence called the homeodomain e. to a DNA sequence called a leucine zipper
A biofilm is an example of (antagonism/competition/cooperation) among microbes.
Fill in the blank(s) with the appropriate word(s).