Which of the following can be used as a final electron acceptor for aerobic respiration?
a. Carbonate ion
b. Molecular oxygen
c. Nitrate ion, sulfate ion and carbonate ion can all be used as a final electron acceptor.
d. Nitrate ion
e. Sulfate ion
Answer: b. Molecular oxygen
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Which of the following antibiotics specifically inhibits DNA synthesis?
A. Tetracycline B. Quinolones C. Polymyxin B D. Gentamycin
Place the steps of biofilm formation in the correct order. _____ Surface (substratum) is preconditioned by environmental molecules. _____ Quorum sensing and the establishment of the extracellular matrix commences as microbes attach more stably. _____ Biofilm matures and some microorganisms escape to the planktonic state. _____ Microbes attach and detach from the preconditioned surface.
Fill in the blank(s) with the appropriate word(s).
Meningoencephalitis and African sleeping sickness are both caused by protozoans
Indicate whether this statement is TRUE or FALSE.
Which of the following would be a good choice to accurately measure 1.0ml? (Choose all that apply)
> 50ml serological pipette > 1.0ml transfer pipette > P-20 micropipette > 5ml graduated cylinder a small beaker > 1.0ml serological pipette > P-1000 micropipette > 1L graduated cylinder > P-200 micropipette