Which is not a characteristic of Helicobacter pylori?
A. Lives in the stomach
B. Gram negative
C. Curved rods
D. Produces enteroxin that causes diarrhea
E. Produces urease that buffers stomach acidity
Answer: D
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Using phase contrast microscopy on a wet mount of live cells, you observe motile bacilli moving rapidly and randomly through the field of view, changing directions after a brief tumble and taking off in a different direction
These cells are exhibiting ________ motility. A) twitching B) swimming C) gliding D) twitching or gliding
Using the tryptophan operon as a model, explain a transcription pause site and the formation of a stem-loop
What will be an ideal response?
What are the problems with cloning as a conservation strategy?Check all that apply.
A. Populations of cloned individuals grow too quickly. B. The root causes of species loss are not addressed by cloning methods. C. It often requires finding appropriate surrogate mothers. D. It requires detailed knowledge of species' reproductive biology. E. It increases genetic diversity of a species beyond natural levels.
Where are small subunits of ribosomes assembled?
a. Plasma membrane b. Nucleus c. Golgi body d. Lysosome e. Nucleolus