MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

The term used for acquisition of naked DNA from its environment and its incorporation in their genome by a bacterium is

conjugation

lysogenic conversion

transformation

transduction

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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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The correct term for the transfer of genetic material between bacteria in direct physical contact is

replication

conjugation

transformation

transduction

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R factors involved in plant-microbe interactions are

essential for transfer of DNA to plant cells

also called opines

bacterial proteins

plant proteins

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What is term used for a bacterial cell that is able to take up naked DNA?

Complementary

Competent

Liable

Infected

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Which of the following statement describes plasmids?

A complex membrane structure that covers the chromosome of bacteria

Small, circular DNA molecules that can exist independently of chromosomes commonly found in bacteria

None of these

Another name for a protoplast

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Recombination of virus genomes occurs

by transformation

by transduction

by transription

simultaneous infection of a host cell by two viruses with homologous chromosomes

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

None of these

Abortive transduction

Specialized transduction

General transduction

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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

natural transformation

generalized phage transduction

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The plasmid-mediated properties is/are

production of enterotoxin

all of these

resistance to antibiotics

fermentation of lactose

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