UNICAMP 2020 – Questão 10

Linguagens / Inglês / Text Comprehension / Extract important information from the text
Antibiotic resistance is possible because bacteria are able to exchange genetic material through a process known as bacterial conjugation. In one experiment, resistance to tetracycline (a commonly used antibiotic) was studied in Escherichia coli by introducing a tetracycline-resistant bacterium to a tetracycline-sensitive strain. The resistant bacterium’s genome contained a protein called an “efflux pump”, a polypeptide that localizes to the cell membrane and expels certain small molecules from the cell.
Using fluorescent marking, researchers observed the DNA encoding one specific efflux pump in between a resistant bacterium and a sensitive bacterium. With livecell microscopy, they tracked the fluorescence to see how the DNA migrated from one cell to another and how it was incorporated and expressed in the recipient bacterium.
(Fonte: Sophie Nolivos e outros, Science,
Washington, v. 364, n. 6442, p. 778-782, maio2019.)
 
Com base no texto e em seus conhecimentos, assinale a alternativa correta.
a) A fusão transmembrana do genoma que confere resistência antibiótica é facilitada pela presença da tetraciclina.
b) A proteína envolvida na resistência antibiótica à tetraciclina é transferida diretamente por conjugação bacteriana.
c) O gene da proteína de resistência antibiótica é transferido através da fusão transmembrana na presença de tetraciclina.
d) O DNA codificador da proteína que confere resistência antibiótica à tetraciclina é transferido por conjugação bacteriana.
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