Which of the following is caused by Haemophilus influenzae in the respiratory tract?
A. Otitis media
B. Epiglottitis
C. Bronchitis
D. Bacterial meningitis
E. Influenza (flu)
Answer: A
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In the G protein-coupled signal transduction pathway, the enzyme phosphodiesterase is responsible for the inactivation of:
A. the alpha subunit of a G protein. B. protein kinase A. C. adenylyl cyclase. D. All of these answer options are correct.
AluI is an example of which type of transposable element commonly found in the genome of humans?
A) LINE elements B) SINE elements C) P elements D) Copia elements E) Ty elements
Ribosomes are the site of
What will be an ideal response?
Which of the following statements about ecological pyramids is true?
A. A pyramid of organism numbers will always have a large base and a small top. B. The limited number of trophic levels in an ecological pyramid is due to increasing complexity and size of organisms at each greater trophic level. C. Pyramids built upon the biomass of organisms at each level eliminate size as a factor. D. Energy gains between trophic levels occur based upon biomass conversion. E. None of the choices are true.