When a vesicle moves along microtubules toward the center of the cell, the molecular motor(s) ________ are used?
A. kinesin
B. Molecular motors are not required for movement along microtubules.
C. both kinesin and dynein
D. dynein
Answer: D
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Which of the following is NOT an effect of global
warming? a. an increase in global photosynthesis b an increase in atmospheric CO2 levels c. a probable increase in extinction of species d. changes in temperature and precipitation patterns e. changes in plant and animal life cycles
Microorganisms can be found growing at almost any pH.
A) True B) False
The mechanism of action of the antibiotic vancomycin is
A) inhibition of protein synthesis. B) inhibition of cell wall synthesis. C) inhibition of nucleic acid synthesis. D) inhibition of a metabolic pathway. E) disruption of cytoplasmic membranes.
While visiting the South Island of New Zealand, you notice that conditions vary sharply across the island. The West Coast is very wet and receives between 600 and 1600 mm of rainfall per year, while the East Coast only receives about 640 mm of rain per year and is very dry. What best explains this regional difference in precipitation?
A. Latitudinal differences between the east and west coasts B. Proximity to Antarctica C. The presence of mountains along the West Coast D. The presence of a large river along the West Coast E. The absence of inland lakes