3.1.1 Gene Transfer Mechanisms Flashcards

1
Q

What is Transduction?

A
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2
Q

Describe the characteritics of Generalized Transduction.

A

From First Aid: A packaging event. Lysogenic phage infects bacterium, leading to cleavage of bacterial DNA. Parts of bacterial chromosomal DNA may become packaged in phage capsid. Phage infects another bacterium, transferring the gene.

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3
Q

Draw a diagram of bacteriophage generalized transduction.

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4
Q

Describe the characteristics of Specialized Transduction.

A

From First Aid: An excision event. Lysogenic phage infects bacterium; viral DNA incorporates into bacterial chromosome. When phage DNA is excised, flanking bacterial genes may be excised with it. DNA is packaged into phage capsid and can infect another bacterium.

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5
Q

Draw a diagram of specialized transduction.

A
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6
Q

Describe the characteristics of Phage Conversion.

A
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7
Q

What are the characteristics of F+ Conjugation and what are the important structural components of the F-plasmid?

A

From First Aid: F+ plasmid contains genes required for sex pilus and conjugation. Bacteria without this plasmid are termed F-. Sex pilus on F+ bacterium contact F- bacterium. A single strand of plasmid DNA is transferred across the conjugal bridge. No transfer of chromosomal DNA.

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8
Q

Draw a diagram of F+ conjugation.

A
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9
Q

Describe the characteristics of Hfr conjugation.

A

From First Aid: F+ plasmid can become incorporated into bacterial chromosomal DNA, termed high-frequency recombination cell. Replication of incorporated plasmid DNA may include some flanking chromosomal DNA. Transfer of plasmid and chromosomal genes.

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10
Q

Gimme some more info about Hfr conjugation.

A
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11
Q

What are integrative conjugative elements?

A
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12
Q

Describe the characteristics of Resistance Plasmid Conjugation.

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13
Q

Draw a diagram of Resistance plasmid conjugation.

A
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14
Q

Describe the 3 ways horizontally transferred DNA can persist in the recipient.

A
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15
Q

Answer.

A

E

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16
Q

Describe the characteristics of Resistance Plasmids.

A
17
Q

What drives R-plasmid development?

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18
Q

Answer.

A

D