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A. Autibiotics destroy pathosenic microbes by preventing the formation of the walls surrounding the membranes of the microbial c
A. Autibiotics destroy pathosenic microbes by preventing the formation of the walls surrounding the membranes of the microbial c
admin
2009-07-11
94
问题
A. Autibiotics destroy pathosenic microbes by preventing the formation of the walls surrounding the membranes of the microbial cells that prevent the cells from split- ting open.
B. More than 70 clinically useful antibiotics have been in- vented to fight pathogenic microbes and cancer cells by interacting with their normal cell processes.
C. Human cells are not surrounded by a membrane
D. Some antibiotics disrupt the cell membrane of certain microbes, letting vital nutrients to escape form the cell or poisonous substances to enter and kill the cell.
E. Nystatin is used to disrupt the wall surrounding the membrane.
F. Some antibiotics fight disease by interfering with chemical activities in microbial cells but not in human cells.
A. antibiotics disrupt cell membranes that contain elements found only in microbial cells
B. people began using antibiotics
C. wonder drugs
D. Penicillin may destroy normal cells of human beings
E. vital to the life of any organism
F. disruption of the cell membrane
选项
答案
C
解析
见第一段“Antibiotics are sometimes called‘wonder drugs’ because they can care many diseases that once were often fatal.”
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