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Biology, 18.07.2021 02:40 sarahgilbert8677
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Question: Which of the followings are true of human genomic libraries? (More than one answer may be correct)
A. They contain the equivalent of the entire human genome, cloned into a vector.
B. They are likely to contain sequences derived from introns.
C. The use of the enzyme reverse transcriptase is crucial in their construction.
D. They contain DNA copies of the mRNAs present in a particular cell or tissue.
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Astudy by solloch and et. al., in 2017, gives the map above which shows the frequency of alleles with a ccr5-delta32 mutations over 87 different countries. this mutation deletes the presence of a co-receptor (ccr5) on the outside of human t-cells (lymphocytes). some viruses, such as the one responsible for the black death and human immunodeficiency virus (hiv), require this receptor for attachment to host cells during the infection process. the black death was an epidemic that passed over northern europe during the 14th century killing nearly 60% of europeans. according to this information, which explanation best explains why northern europeans show a greater immunity for hiv than some other parts of the world?
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