Overall, genes are unevenly distributed along their chromosomes. Indicate whether the statement is true or false
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Which would be more likely to cause illness-a water sample that tested positive for coliforms or one that tested positive for E. coli O157:H7?
A. Both would be equally capable of causing illness-all coliforms cause illness. B. The coliform positive sample would be more likely to cause illness. Coliforms are inherently more pathogenic than the weak O157:H7 lab strain of E. coli. C. The E. coli O157:H7 sample would be more likely to cause illness. This strain of bacterium is highly pathogenic and capable of causing kidney damage. D. Neither-there is usually a small amount of coliforms (including E. coli O157:H7) in all water.
Which of the following involves removing introns and reconnecting exons in a pre- mRNA?
a. splicing b. encoding c. translating d. elongation
The biological species concept
1.defines a species as a group that can interbreed and produce fertile offspring. 2.applies to asexually reproducing organisms. 3.looks at visible traits. 4.emphasizes evolutionary relationships. 5.was used by Carolus Linneaus.
The drug used against intestinal anaerobic bacteria, that can also alter normal flora causing antibiotic-associated colitis is
A. bacitracin. B. chloramphenicol. C. clindamycin. D. ciprofloxacin. E. gentamicin.