What is the causative pathogen of Q fever?
A. Bacteroides fragilis
B. Prevotella
C. Coxiella burnetii
D. Moraxella catarrhalis
E. Acinetobacter
Answer: C
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Chromosomes can be condensed into compact structures, visible with the light microscope, but usually only:
A. while the nuclear pores are open. B. while the proteins are being assembled. C. after the cell is dead. D. while the DNA is being copied into RNA. E. during cell division.
Which one of the following biological polymers is defined by a physical property rather than a chemical structure?
A. proteins B. lipids C. monosaccharides D. nucleic acids E. polysaccharides
In a cyclic metabolic pathway, the ____
a. product inhibits the first enzyme b. last step regenerates an enzyme for the first step c. product inhibits the last enzyme d. last step may regenerate a reactant for the first step e. regulatory molecules bind to regions other than the active site
What is an asteroid?
a. dust and small rock orbiting around the sun b. a ball of ice with a tail c. a small planet d. a small sun with weak solar emissions e. debris from a large planet