Questions And Worked Solutions For AP Biology 2020 Sample Exam
2020 AP Biology Sample Free Response Questions & Solutions
AP Biology 2020 Sample Free Response Questions - Complete Paper (pdf)
- In many countries, Anopheles gambiae mosquitoes are responsible for transmitting
the parasite that causes malaria to people through their bites. A primary tool for
mosquito control is the use of insecticidal nets sprayed with chemicals known as
pyrethroids, which are relatively safe for people but toxic to mosquitoes. However,
mosquito resistance to pyrethroids has now become widespread. Pyrethroids
interfere with the function of a transmembrane sodium channel found in cells
of the mosquitoes (Figure 1). In one common mutation to the channel protein, a
phenylalanine is substituted for a leucine at amino acid position 1014. Scientists
hypothesize that this mutation is responsible for some cases of pyrethroid resistance. …
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