z****o
发帖数: 368 | 1 Bacterial strain X is resistant to ampicillin and sensitive to gentamicin.
Bacterial strain Y is resistant to gentamicin and sensitive to ampicillin.
Bacterial strains X and Y are grown in mixed culture in medium without
antibiotics, then the culture is plated on medium containing both ampicillin
and gentamicin. Bacterial colonies grow on the plates. In a second experiment,
DNase is added to the mixed culture medium. When this mixed culture is plated
on medium containing both antibiotics, no col | z****o
发帖数: 368 | | l*********0
发帖数: 85 | 3 Because several 'answers' are not correct. | s******t
发帖数: 579 | 4 You are right, the correct answer should be D.
【在 z****o 的大作中提到】
: 我觉得应该是D,答案给的是A。请问为什么
| z****o
发帖数: 368 | |
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