Which of the following would NOT be an action of the complement system?
a. lysis of a pathogen's membrane
b. trapping of pathogens in tangled protein threads
c. marking of pathogens for destruction by macrophages
d. attraction of phagocytes to the scene of pathogen invasion
e. membrane attack complexes
B
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Several chemical properties make water uniquely suited for its role as a central "molecule of life." Which of the following is FALSE?
A. Hydrogen bonding leads to high cohesiveness between water molecules. B. Water resists temperature changes. C. Water is always polar. D. The structure of a water molecule is stabilized by hydrogen bonds. E. Water is a good solvent of polar molecules and ions.
Compare and contrast plant and animal cell structure. Include at least two similarities and two differences
What will be an ideal response?
Which one of the following produces small "fried-egg" colonies on medium containing horse serum and yeast extract?
A) Chlamydophila B) Legionella C) Mycobacterium D) Mycoplasma E) Streptococcus
Ultraviolet water treatment systems are very common in _______ but not in the United States.
A. Europe B. Asia C. Australia D. South America