Which of the following is NOT true of exotoxins?

A. exotoxins are part of the bacterial cell wall
B. they are usually made of protein
C. Some are enterotoxins
D. Some are neurotoxins
E. All of the above are TRUE of exotoxins


Ans: A. exotoxins are part of the bacterial cell wall

Biology & Microbiology

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Mammals underwent an evolutionary "explosion" or major adaptive radiation in the

a. Mesozoic. b. Cambrian. c. Triassic. d. Devonian. e. Cenozoic.

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Which of the following explains why females are more likely to be "choosy" about mating partners than males?

a. Females are more limited in the number of offspring they can produce than males are b. Eggs require more energy to produce than sperm c. Males can fertilize the eggs of multiple females, while a female's egg can only be fertilized by a single male d. All of these

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The longest portion of the large intestine region is known as the _____________.

A. lumen B. appendix C. rectum D. cecum E. colon

Biology & Microbiology