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

question 69

Multiple Choice

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?

• A) conjugation
• B) transduction
• C) transformation
• D) reciprocal translocation
• E) transfection

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Definitions:

Equivalent Units

A concept used in process costing that converts partially completed units into a number of fully completed units.

Conversion Costs

The combined costs of direct labor and manufacturing overhead, representing the expenses incurred in converting raw materials into finished products.

Processing Department

A specific department within a factory where a particular stage of production is carried out, such as assembly or painting.

Cost Per Equivalent Unit

The total cost of production, both direct and indirect, divided by the number of equivalent units produced, considering the stage of completion.