Dna

Front 1

generalized transduction

Back 1

Describes transduction by phages that, having absorbed the entire bacterial chromosome of a host cell, can transfer any gene from the donor bacterium.

Front 2

F-factor:

Back 2

A plasmid that codes for the pilus and other genes needed for DNA copy and transfer in conjugation; short for “fertility factor.”

Front 3

F- cells

Back 3

Cells lacking the F-factor.

Front 4

F+ cells

Back 4

Cells carrying an F-factor.

Front 5

conjugation

Back 5

Direct transfer of DNA from 1 bacterium to another.

Front 6

competent bacteria

Back 6

Bacteria equipped with the necessary transport proteins for transformation.

Front 7

high frequency recombinant

Back 7

Occurs when the F-factor integrates into the donor bacterial chromosome; may transmit the entire donor chromosome and finally the integrated F-factor sequences if attached long enough

Front 8

pilus tip

Back 8

An attachment site or ligand for specific receptors on bacteria that lack an F-factor.

Front 9

transducing particles

Back 9

Particles that contain bacterial DNA rather than phage DNA; may later transfer this DNA into the DNA of another bacterium.

Front 10

specialized transduction

Back 10

Describes transduction by phages that always pick up just 1 area of the donor bacterial chromosome and can, therefore, transduce a limited number of bacterial genes.

Front 11

transformation

Back 11

Bacterial gene transfer wherein the bacteria are transformed into a different genotype.

Front 12

transduction:

Back 12

A bacterial gene transfer mechanism in which a phage carries 1 or more genes from 1 bacterium to another.