What is meant by selective toxicity?
a. Chemotherapeutic agents should work on many different targets on a pathogen.
b. Chemotherapeutic agents should work on certain types of pathogens.
c. Chemotherapeutic agents should act against the pathogen and not the host.
d. Chemotherapeutic agents should have only one mode of action.
Answer: c. Chemotherapeutic agents should act against the pathogen and not the host.
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List the six steps of one full cycle of the scientific method.
What will be an ideal response?
The simplest animals with a closed circulatory system are
A. mollusks. B. amphibians. C. annelids. D. fish. E. reptiles.
Hydrophobic reactions of phospholipids can produce
clusters of their fatty-acid tails to form a. a lipid bilayer. b. hydrolysis of the fatty acids. c. a protein membrane. d. a cytoskeleton. e. a nonpolar membrane.
How could you genetically modify an animal so that it would distinguish more shades of green?
A) Induce genes to produce a greater number of cone cells in the fovea. B) Introduce genes for different opsins that respond in the green region of the spectrum. C) Introduce genes to produce green fluid in the eyeball, because green fluids will not absorb green light. D) Induce increased production of cGMP to increase opening of cGMP-gated sodium channels.