15
practice testMultiple Choice

Practice Test

Question 15 • TPS EdX Biology

Which best describes the different modes of bacterial reproduction?

Answer
A
In transduction, a bacterium exchanges a piece of its own DNA with another from the environment.
B
In conjugation, a special sex pilus is required to connect two bacterial cells.
C
In transformation, bacterial DNA is transferred from one bacterium to another by a replicating virus.
D
In genetic recombination, two new genetically identical cells are produced.

Explanation

Conjugation involves direct DNA transfer between bacterial cells, and a sex pilus connects the cells. Transformation is the uptake of free DNA from the environment, while transduction uses a virus to transfer DNA. Genetic recombination changes or combines genetic material; it is not the production of two identical cells.

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