what type of exotoxin causes gastroenteritis in patients infected with E.coli?
What will be an ideal response?
enterotoxin
You might also like to view...
Why was it necessary to culture E. coli for multiple generations in the 14N-rich medium to rule out the dispersive model?
a. Nitrogen is frequently lost by cells during meiosis, so multiple generations were required to ensure that residual-free 15N in the cytoplasm was replaced by 14N from the new medium. b. Multiple generations were required to ensure that the samples did not contain significant quantities of DNA from other organisms, which would confound the analysis of E. coli DNA. c. After only a single generation, it was expected that the DNA extracted from E. coli would contain equal proportions of 15N and 14N in both the semi-conservative and dispersive models. d. Multiple generations of replication in the 14N-rich medium were required to rule out the possibility that the changes to the DNA mass were not the result of inevitable statistical noise.
What was the significance of Griffith's and Avery's "transformed" cells?
What will be an ideal response?
Which of the following structures would be
most attractive to a fire ant?
a. an electric can opener b. a canvas patio umbrella c. aluminum foil d. a ceramic flower pot e. a leather sofa
Paired homologous chromosomes are found at the spindle equator during
a. metaphase I. b. telophase I. c. prophase II. d. metaphase II. e. anaphase II.