Plaques Produced by the Temperate Phage Lambda on E

question 48

Multiple Choice

Plaques produced by the temperate phage lambda on E. coli are turbid, since some bacteria remain viable within the plaque area. Plaques produced by the virulent phage T4 are usually clear. Which statement is the BEST explanation for this difference?

• A) Lambda can propogate via the lytic or lysogenic cycle.
• B) T4 carries a smaller DNA genome than lambda.
• C) Recombination occurs more frequently between lambda genomes than T4 genomes.
• D) Lambda often carries a portion of the sex factor.
• E) T4 will not infect E. coli cells that are growing.

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