Mechanisms of Bacterial Gene transfer Flashcards Preview

Term 4: Infectious Diseases > Mechanisms of Bacterial Gene transfer > Flashcards

Flashcards in Mechanisms of Bacterial Gene transfer Deck (5)
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1

What are the three means by which bacteria can transfer plasmids to other bacteria?

-conjugation

-transformation

-transduction

2

What is transposon?

-a small genetic element capable of mediating their own movement from one chromosomal (or plasmid) location to another

-compound transposons carry accessory genes, such as antibiotic resistance genes

3

What is bacterial conjugation?

-cell-to-cell contact and formation of a a conjugation bridge via a sex pilus

-conjugative plasmid in donor (male) encodes sex pili to initiate cell-cell contact

-transferred DNA cannot be maintained as an atonomous plasmid, so homologous recombination is required

4

What is bacterial transformation

-DNA binds to and enters the cell surface. then integrates into host chromosome via homologous recombination

5

What is bacterial transduction?

-bacteriophage injects nucleic acid into bacteria