9
lesson pretestMultiple Choice

Pretest

Question 9 • TPS EdX Biology

Which mode of genetic recombination is matched correctly with its description?

Answer
A
transformation—uses a pilus to transmit genetic information between bacteria
B
conjugation—involves splitting of one cell and results in two identical cells
C
binary fission—requires direct cell-to-cell contact of bacteria
D
transduction—virus transfers genes from one bacteria to another

Explanation

In transduction, a virus—usually a bacteriophage—carries bacterial DNA from one bacterium to another. A pilus and direct cell-to-cell contact describe conjugation, while binary fission is cell division that produces two cells, not a mode of genetic recombination.

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