The first and second lines of defense against microbial invasion are part of
A. innate immunity.
B. adaptive immunity.
C. species resistance.
D. microbial antagonism.
E. species immunity.
Answer: A
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The troph of the motile T. vaginalis organism measures 7 to 23 m long and 5 to 15 m wide. The recommended treatment of choice for this urogenital infection is:
a. tetracycline. b. metronidazole. c. penicillin. d. ketoconazole.
For an enzyme to function it requires
a. oxygen. b. a suitable substrate. c. a considerable amount of activation energy. d. ATP. e. all of these.
Members of which group are known to form blooms known as red tides?
a. green algae b. red algae c. euglenoids d. dinoflagellates e. brown algae
Which of the following do carrier proteins often transport?
a. proteins b. steroid hormones c. H2O d. glucose and amino acids