The toxic component of lipopolysaccharide is called ________.
A. lipid A
B. hemolysin
C. O antigen polysaccharide
D. exotoxin
Answer: A
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After DNA replication is complete, each strand of the original molecule is bound to a new complementary strand. This process is known as
A. disruptive replication. B. conservative replication. C. semiconservative replication. D. dispersive replication. E. stabilizing replication.
Which of the following is the correct order of steps of gas transport and exchange?
A. ventilation, diffusion across the respiratory surface, circulation, diffusion between blood and cells B. diffusion across the respiratory surface, ventilation, diffusion between blood and cells, circulation C. ventilation, circulation, diffusion across the respiratory surface, diffusion between blood and cells D. circulation, diffusion across the respiratory surface, ventilation, diffusion between blood and cells E. diffusion between blood and cells, circulation, ventilation, diffusion across the respiratory surface
The primary interest of genetic research into stem cells is the desire to be able to clone a human being
Indicate whether the statement is true or false
Using laser beams within the solar system to find distances to celestial objects is possible but the length of time needed could be exceeding long for real communication
a. True b. False Indicate whether the statement is true or false