MICROBIAL RECOMBINATION AND GENE TRANSFER QUIZ

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

Another name for a protoplast

None of these

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Which of the following is used by microbial genetisists as a tool?

Plasmids

All of these

Bacteriophage

Transposable elements

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

Plasmids

Replicon

Tandons

Transposons

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

Abortive transduction

General transduction

Specialized transduction

None of these

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A microarray differs from a gene fusion in that, it

carries DNA segments from many different genes

gives direct measurement of mRNA level

All of these

is not constructed by cloning

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F factor plasmids play a major role in

replication

trasnscription

transduction

conjugation

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Inverted repeat sequences at each end and a gene encoding transposase is contained in which of the following transposable element?

Composite transposon

Plasmid

Virus

Insertion element

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

Conjugative plasmids

Cryptic plasmids

None of these

Non-conjugative plasmids

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

natural transformation

generalized phage transduction

None of these

conjugal transfer by a self-transmissible plasmid

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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

lysogenic conversion

transformation

conjugation

transduction

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