When a transducing phage interacts with a new host cell, A) the DNA from the previous host can recombine with the new host chromosome. B) the new host cell will be lysed. C) it will cause the new cell to produce more transducing phage.
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A transducing phage… A) contains fragments of the host chromosome instead of the viral genome. B) cannot infect new host cells. C) is a lysogenic bacteriophage. D) has a viral coat made of host proteins.
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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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What is the hallmark of all horizontal gene transfers? A) Transfer of DNA using a virus B) The use of plasmids C) Transfer of DNA between organisms of the same generation D) Transfer of DNA from parent to offspring
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Which statement about conjugation is false? A) Conjugation involves transfer of DNA from one cell to another. B) The recipient cell becomes a donor after conjugation. C) Conjugation is a process of bacterial reproduction.
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Bacterial conjugation is often referred to as bacterial sex. Why is this term inaccurate? B) Bacteria are neither male nor female. C) Sex is a phenomenon only seen in animals. D) Conjugation does not result in the formation of new offspring.
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What must occur for bacterial conjugation to take place? A) The cells must transfer RNA. B) One of the cells must be E. coli. C) The cells must come into contact with each other. D) Each cell must contain a plasmid.
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Which of the following is a characteristic of an F+ cell? A) Presence of a fertility factor B) Ability to synthesize sex pili, presence of a fertility factor, and ability to mate with an F- cell. C) Ability to mate with an F- cell D) Ability to synthesize sex pili
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What benefit does the F- strain receive from mating with an Hfr strain? A) It picks up a fertility factor. B) It can now produce sex pili. C) It acquires new, potentially beneficial genes from the Hfr strain. D) It becomes an F+ cell.
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How does an F+ cell differ from an Hfr cell? A) Hfr cells cannot perform conjugation. B) Hfr strains have the F plasmid integrated into the chromosome. C) Hfr strains can no longer reproduce. D) F+ cells have no plasmids.
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