Which of these organisms does not produce an enterotoxin?
A) Shigella spp.
B) Clostridium botulinum
C) Vibrio cholerae
D) Staphylococcus aureus
Ans: B) Clostridium botulinum
You might also like to view...
How can analysis of mammalian genomes be used to detect and treat human disease? Check all that apply.
_____ The genomes of the mammalian relatives of humans are the best targets for discovering new treatments for human diseases. _____ Comparing the genomes of parasite and host is likely to reveal good drug targets to eliminate the parasite without harming the host. _____ A comparison of mouse and human genomes would help reveal functions for previously unidentified human genes. _____ A comparison of human and mouse genomes would help observe DNA sequences that evolved prior to the evolution of mammals.
Which is true about prokaryotic (bacterial) RNA polymerase?
A. It is used during transcription. B. It does not require a primer. C. It has a detachable subunit, sigma factor, which recognizes the promoter. D. It reads the template in the 3'-5' direction. E. All of the choices are true.
The passage of an arthropod through stages from egg to adult is
A. differentiation. B. evolution. C. graduation. D. metamorphosis. E. succession.
Which of the following statements best describes the relationship between photosynthesis and respiration?
A) Respiration runs the biochemical pathways of photosynthesis in reverse. B) Photosynthesis stores energy in complex organic molecules; respiration releases energy from complex organic molecules C) Photosynthesis occurs only in plants; respiration occurs only in animals. D) Photosynthesis is catabolic; respiration is anabolic.