Match the following items with the correct phrases.
_______1. The ____________________ produced by Clostridium botulinum and Clostridium tetani are examples of virulence factors.
_______2. The ____________________ produced by Clostridium perfringens and Streptococcus pyogenes are examples of virulence factors.
_______3. _______________ are exoenzymes that cause clot formation.
_______4. _______________ are exoenzymes that dissolve clots.
_______5._______________ are produced by Clostridium difficile, Salmonella spp., Shigella spp., Vibrio cholerae, and certain serotypes of E. coli.
a. coagulases
b. enterotoxins
c. kinases
d. necrotizing enzymes
e. neurotoxins
1. e. neurotoxins
2. d. necrotizing enzymes
3. a. coagulases
4. c. kinases
5. b. enterotoxins
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The World Trade Organization (WTO), established in 1995, has which of the following as an objective?
a. support free trade b. eliminate trade subsidies c. establish binding rules to ensure fairness in trade d. All of these.
Which characteristic of the molecule on the left determines the structure of the molecule on the right?
1.configuration of sugar-phosphate backbone
2.sequence of nitrogenous bases
3.type of pentose
4.measurement between major and minor grooves
Gastrulation produces
a. hollow balls of cells. b. embryos with primary tissue layers. c. solid balls of cells. d. maternal messages. e. all of these
The diet of the direct ancestors of primates included
a. grass and leaves. b. insects and seeds. c. fruits and nuts. d. eggs and smaller animals. e. all of these