Q. In which bacteria competence pheromones was first identified?

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Q. What is the percentage of DNA molecules taken up by competent cells during the transformation?

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Q. Transformation of E. coli does not occur.

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Q. During conjugation the Donor cell have cell surface appendages known as ____________

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Q. What is the size of the F factor that is involved in conjugation?

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Q. In how many states the F plasmid can occur within bacteria?

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Q. By which of the following methods does the F plasmid integrates into the bacterial genome?

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Q. High frequency recombination cell contains an integrated F factor. What is the name of such a cell?

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Q. What is the strain of the Hfr⁺ cell where the F factor is integrated near the tbr and leu loci?

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Q. Transformation, transduction and conjugation occur in every bacterial cell.

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Q. Where do the chimera molecules propagate?

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Q. Mutation sometimes assists the uptake of DNA material. It is a transformational regulator.

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Q. What is the DNA sequence for cleavage by the endonuclease that is coded by hsdR?

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Q. In which of the following methylation dependent restriction system is necessary?

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Q. The DAM protein methylates which residue in the sequence GATC?

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Q. The quality and yield of plasmid DNA preparation both are enhanced by end A mutation.

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Q. What is the main characteristic that is present in a useful transformation method?

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Q. Plasmids contribute to the survivality of its host cells.

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Q. Which of the following types of resistance is not provided by the plasmid for its host?

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Q. The drug, quinolone, resistance is observed in which of the following?

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