micro- bacterial sex genetics Flashcards Preview

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Flashcards in micro- bacterial sex genetics Deck (13):
1

what is binary fission

gene replication then splitting in two

2

what are the ways of sexual diversity in bacteria

transformation
transduction
conjugation
transposon

3

what is transformation

DNA fragments from one bacterium post-lysis bind to cell wall of another bacter that is very very similar so the material can be taken up and incorporated

4

what is transduction

when a virus infects bacteria, bacteriophage carrying bacterial DNA
2 types: generalized- virulent
specialized- temperate

5

What is a virulent phage vs temperate

virulent quickly incorporate themselves and lyse the cells
temperate will enter and be dormant until activated- called a prophage

6

what is lysogenic immunity

ability of integrated bacteriophage to block infection of another bacteria

7

what is generalized transduction

when DNA bacterial fragments are accidently taken up in a phage that will be released to infect another bacterium. because its only bacterial DNA the new bacterium will survive

8

what is specialized transduction

incorrect splicing of the prophage out of the genome so that now new part on end from bacterium that is packaged with prophage

9

What bateria is well known for specialized transduction

the E coli with BIOtin gene and GALactose gene one on either end

10

What bacteria obtains its exotoxin by lysogenic conversion

Corynebacterium diphtheria

11

What is conjugation

F plasmid which encodes for sex pilus to transfer F plasmid to another. can encode other enzymes and proteins as well
main mech for antibiotic resistance

12

What is HFr cell in bacteria

when the F plasmid does not stay a plasmid but actually incorporated into genome

13

What are transposons

mobile genetic elements that insert themselves in chromosomes without having DNA homology carrying factors and antibiotic resistance
do not replicate independently but copied during host DNA transcription