Sulfur occurs in all living matter primarily as a component of proteins
Indicate whether this statement is TRUE or FALSE.
TRUE
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Klebsiella spp. were isolated from a sputum sample, and susceptibility testing was performed. The isolates were sensitive to several antibiotics; however, they were resistant to ampicillin. Which one of the following statements explains this discrepancy?
a. The ampicillin disk is most likely expired. b. Because Klebsiella spp. should be sensi-tive to ampicillin, a technical error is to blame. c. Ampicillin inhibits cell wall synthesis. In addition, because Klebsiella spp. do not have a cell wall, they should not have been tested for ampicillin. d. No discrepancy is present; Klebsiella spp. are normally resistant to ampicillin.
oncognesis is the __ way viruses effect host cells in vivo?
Fill in the blank(s) with the appropriate word(s).
Two individuals are members of the same species if
they a. possess the same number of chromosomes. b. breed at the same time. c. are phenotypically indistinguishable. d. can mate and produce fertile offspring. e. occupy the same habitat.
An action potential is a brief reversal of the
__________ potential. Fill in the blank(s) with the appropriate word(s).