What most likely explains the recovery of live S strain cells from a mouse injected with heat-killed S strain mixed with live R strain cells? A) The S strain fused with the R strain, making it resistant. B) The R strain picked up the S strain DNA, enabling it to produce a capsule. C) The S strain was revived by the presence of the host’s immune system. D) The R strain cells picked up the capsules from the S strain cells.

What most likely explains the recovery of live S strain cells from a mouse injected with heat-killed S strain mixed with live R strain cells? A) The S strain fused with the R strain, making it resistant. B) The R strain picked up the S strain DNA, enabling it to produce a capsule. C) The … Read more

Competent cells are cells that… A) can take up DNA from their surrounding environment and integrate it into their own chromosomes by recombination. B) have the ability to produce capsules. C) are killed by heat. D) are also considered “rough-strain” based on colony phenotype.

Competent cells are cells that… A) can take up DNA from their surrounding environment and integrate it into their own chromosomes by recombination. B) have the ability to produce capsules. C) are killed by heat. D) are also considered “rough-strain” based on colony phenotype.

How is generalized transduction different from specialized transduction? A) Only one specific host gene is transferred in both specialized and generalized transduction. B) Specialized transduction uses animal viruses instead of bacteriophage. C) Generalized transduction is initiated during the lytic cycle of a virulent bacteriophage; specialized transduction is initiated during the lysogenic cycle of a temperate bacteriophage. D) Generalized transduction is initiated by a lysogenic bacteriophage; specialized transduction is initiated by a lytic phage.

How is generalized transduction different from specialized transduction? A) Only one specific host gene is transferred in both specialized and generalized transduction. B) Specialized transduction uses animal viruses instead of bacteriophage. C) Generalized transduction is initiated during the lytic cycle of a virulent bacteriophage; specialized transduction is initiated during the lysogenic cycle of a temperate … Read more

Which finding is most surprising from Griffith’s experiments? A) S strain cells are isolated from the blood of mice infected with heat-killed S strains and live R strains. B) R strain cells fail to produce a capsule. C) S strains are able to escape phagocytosis. D) S strain cells kill the mice.

Which finding is most surprising from Griffith’s experiments? A) S strain cells are isolated from the blood of mice infected with heat-killed S strains and live R strains. B) R strain cells fail to produce a capsule. C) S strains are able to escape phagocytosis. D) S strain cells kill the mice.

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