MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

The plasmid which makes the host more pathogenic is

Metabolic plasmid

None of these

Virulence plasmid

F factors

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In lysogeny,

a bacteriophage transfers bacterial DNA

a bacteriophage genome is integrated into the bacterial genome

bacteria take up double stranded DNA from the environment

DNA-degrading enzymes in the extracellular medium would stop the process

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Who discovered transposons (jumping genes)?

Griffith

Harvey

Abelson

McClintock

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Which of the following genetic elements carry the genes required for integration into host chromosomes?

Tandons

Plasmids

Transposons

Replicon

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The transposase gene encodes an enzyme that facilitate

site-specific integration of transposable elements

None of these

viral replication within a genome

general recombination

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Which of the following statement describes plasmids?

A complex membrane structure that covers the chromosome of bacteria

Another name for a protoplast

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

None of these

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

transduction

conjugation

replication

transformation

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Which of the following type of recombination does not require homologous sequences and is important for the integration of viral genomes into bacterial chromosomes?

Site-specific recombination

General recombination

Mutagenic recombimation

Replicative recombination

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

mutagenic recombination

site-specific recombination

general recombination

replicative recombination

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

transduction

lysogenic conversion

conjugation

transformation

TRUE ANSWER : ?
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