Lecture4: Bacterial Genetics

Question 1

What type of enzymes is antibiotic resistance mediated by?

Answer 1

Beta-lactamases

Question 2

What do Pili do?

Answer 2

Mediate adherence of bacteria to epithelial cells

Question 3

Name exotoxins

Answer 3

Clostridium tetani

Question 4

Are Transposons capable of independent replication?

Answer 4

No

Question 5

Which genes are responsible for homologous recombination?

Answer 5

Rec genes

Question 6

Which type of DNA sequences does site specific recombination occur between?

Answer 6

Dissimilar DNA sequences

Question 7

Plasmids carry the genes for which functions?

Answer 7

Antibiotic resistance, endotoxins, Pili

Question 8

What is the exchange of genes between 2 bacterial cells called?

Answer 8

Conjugation, transformation, transduction

Question 9

What is the exchange of genes within one bacterial cell called?

Answer 9

Transposition

Question 10

What is Recombination?

Answer 10

when nucleic acid molecules from diff sources are combined or rearranged

Question 11

What is Homologous recombination?

Answer 11

Occurs between closely related DNA sequences

Question 12

What produces the enzymes required for homologous recombination?

Answer 12

Rec Genes

Question 13

What is Site-specific recombination?

Answer 13

Occurs between dissimilar DNA sequences

Question 14

What does Transposition contribute to?

Answer 14

The cell’s antibiotic resistance

Question 15

In Transformation what is the cell’s ability to take up DNA from the donor cell called?

Answer 15

Competence

Question 16

Explain conjugation?

Answer 16

Requires intimate cell contact, only Plasmid DNA transferred

Question 17

Describe chromosome

Answer 17

Single circular supercoiled double stranded

Question 18

Define Plasmid

Answer 18

Extrachromosomal, double stranded, circular

Question 19

Define Transposable elements

Answer 19

Jumping genes

Question 20

Which transfer type is related to he Sex Pilus?

Answer 20

Conjugation