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Biology, 22.06.2019 12:40
Select the correct answer from each drop-down menu. the lac operon in e.coli regulates genes that code for enzymes required for breakdown of lactose. the lac operon is operon that is activated in the presence of .
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Biology, 22.06.2019 13:00
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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Biology, 22.06.2019 20:40
Which of these is an example of structural protein in plants
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Biology, 22.06.2019 22:30
Based on their relative positions in the periodic table, which two elements would have the same number of valence electrons?
Answers: 3
A recessive allele on the X chromosome is responsible for red-green color blindness (b) in humans. A...
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