Cooking oil and gasoline (a hydrocarbon) are not amphipathic molecules because they _____
A) do not have a polar or charged region
B) do not have a nonpolar region
C) have hydrophobic and hydrophilic regions
D) are highly reduced molecules
Answer: A
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Which is a true statement regarding the size of PCR products?
A. Since the number of DNA products extends beyond each primer with each cycle, when PCR is completed, the majority of products are of various sizes. B. Since the number of DNA products ending exactly between both primers increases with each cycle, when PCR is completed, the majority of products are of similar size. C. Since the length of primers increases with each cycle, when PCR is completed, the majority of products are of various sizes. D. None of the choices are correct.
The benefits to an animal of defending a territory may include
A. food. B. sheltered nesting sites. C. mates. D. Answers A, B and C are correct. E. None of these answers are correct.
Once old core regions deindustrialize and suffer the effects of creative destruction, they move to the periphery
Indicate whether this statement is true or false.
The organism Plasmodium falciparum causes malaria. In which type(s) of human cell(s) does it infect and grow?
A. liver and red blood cells B. intestinal cells C. liver and intestinal cells D. red blood cells E. liver cells