This hormone does not play a role in the female reproductive system.
A. estradiol
B. progesterone
C. gonadotropin-releasing hormone
D. follicle-stimulating and luteinizing hormones
E. insulin
E. insulin
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Which of the following is most similar to the Watson—Crick helix?
A) B-DNA B) C-DNA C) A-DNA D) mRNA E) Z-DNA
Mannitol salt agar (MSA) only allows the growth of halophiles (salt-loving microbes). Among the halophiles, mannitol fermenters release acid that turns the pH indicator yellow; mannitol nonfermenters leave the medium red. Onto MSA you inoculate a halophilic mannitol nonfermenter and a nonhalophilic mannitol nonfermenter. Here the medium acts as a ________ medium.
A. enrichment B. selective and differential C. selective D. differential
Which of the following are examples of exotoxins?
a. streptolysin b. coagulase c. collagenase d. keratinase e. kinase f. LPS g. hemolysis
Which of the following is not true of viruses?
A) they are smaller than bacterial cells B) they are fee living C) they are acellular D) they are parasitic