In which of the following groups of organisms are most species iteroparous?
A) annual plants
B) perennial plants
C) periodical cicadas
D) salmon
B
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Adenoviruses are a frequent cause of acute upper respiratory tract infections in humans. Adenoviruses are non-enveloped and their capsid contains a "fiber" protein that is analogous in function to the spike glycoproteins of HIV. Which of the following would be ACCURATE about an adenovirus that has a mutation in its fiber protein gene?
A. The virus would still cause upper respiratory tract infections in humans but at a slower rate. B. Because it has a defective fiber protein, it will now have a broader host range. C. It would not be able to cause disease in humans. D. It would be able to infect humans normally, but would not be able to replicate its genome. E. It would be able to infect humans normally, but would not be able to release new adenoviruses from the human cells.
Materials move through a moss plant by
A. diffusion. B. the xylem. C. the phloem. D. endocytosis.
What enzyme phosphorylates MAP kinase kinase?
A. MAP kinase kinase kinase B. MAP kinase C. MAP phosphatase D. MAP kinase kinase
You are growing Bacillus subtilis, an aerobic bacterium that can also carry out fermentation when required, in a bioreactor and notice that the growth rate has slowed and the pH has decreased. What could you add?
A) glucose B) lactose C) peptides D) oxygen E) lactic acid