leu^- bacteria are mixed in a flask with leu⁺ bacteria, and soon all bacteria are leu⁺. However, if the leu^- cells are on one side of a U-tube, which is divided into two compartments by a filter with fine pores, and the leu⁺ cells are on the other, the leu^- cells do not become prototrophic. Which process is likely to produce this observed result?

Question

Quizplus · Accepted Answer

Conjugation requires direct cell-to-cell contact, which is possible in a flask but not through a filter in a U-tube.

Leu- Bacteria Are Mixed in a Flask with Leu+ Bacteria

Leu^- Bacteria Are Mixed in a Flask with Leu⁺ Bacteria