What structural part of a bacterial flagellum is composed of flagellin?
a. Rod
b. Basal body
c. Hook
d. Filament
Ans: d. Filament
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What is the role of light in photosynthesis?
A. It excites electrons. B. It splits ATP molecules. C. It is the source of electrons. D. It fixes carbon into sugars.
The skin and oral cavity may have anaerobic microenvironments
Indicate whether this statement is true or false.
Cholera produces severe diarrhea by ____
a. increasing the rate at which cells pump out ions b. decreasing osmosis in small intestinal cells c. blocking ATP production d. increasing water pumps in small intestinal cells e. blocking sodium and potassium channels
A compound contains hydroxyl groups as its predominant functional group. Which of the following statements is true concerning this compound?
a. It should dissolve in water. b. It won't form hydrogen bonds with water. c. It lacks an asymmetric carbon, and it is probably a fat or lipid. d. It is hydrophobic. e. It should dissolve in a nonpolar solvent.