MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by

None of these

conjugal transfer by a self-transmissible plasmid

generalized phage transduction

natural transformation

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The type of recombination that commonly occurs between a pair of homologous DNA sequences is,

replicative recombination

site-specific recombination

mutagenic recombination

general recombination

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The transducing particles carry only specific portions of the bacterial genome in which of the following transduction?

General transduction

Abortive transduction

None of these

Specialized transduction

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Which of the following plamids do not possess information for self transfer to another cell?

None of these

Conjugative plasmids

Non-conjugative plasmids

Cryptic plasmids

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Which of the following is the cause for drug resistance in tuberculosis?

Mutation

Transduction

Transformation

Conjugation

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The plasmid-mediated properties is/are

production of enterotoxin

resistance to antibiotics

all of these

fermentation of lactose

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When composite transposons are formed

a small deletion occurs in the transposase gene of an IS element and plasmid is integrated

two IS elements integrate into a chromosome with only a small distance separating them

an IS element integrates with another IS element with the help of a plasmid

a small deletion occurs in the transposase gene of an IS element

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Which of the following term describes the relationship between a virus and host where no new viral particles are produced and the viral genome is replicated along with host chromosome?

Lysis

Transformation

Lysogeny

Conjugation

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The chromosomal genes, possessing fertility factor is known as

R factor

F factor

HFr

F prime factor

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The plasmids can be eliminated from a cell by the process known as

expulsion

breaking

curing

fixing

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