Bacteriophages – Section 1

11. __________ is specifically able to have a long-term relationship with the host known as lysogeny.

A. Temperate virus
B. Adsorbed virus
C. RNA phage
D. DNA phage

Correct Answer: A. Temperate virus

12. Which of the following properties is due to lysogenic conversion by phages?

A. Toxin production in Corynebacterium diphtheriae
B. Toxin production in Clostridium botulinum types C and D
C. Antigenic variation in Salmonella anatum
D. All of the above

Correct Answer: D. All of the above

13. T-even phage binding to E. coli probably involves

A. electrostatic interaction
B. hydrophobic interaction
C. covalent bonds
D. all of these

Correct Answer: A. electrostatic interaction

14. The filamentous bacteriophage infects male E. coli cells by attaching to

A. lipopolysaccharide
B. the cell wall
C. the tip of the pilus
D. the cell membrane

Correct Answer: C. the tip of the pilus

15. A bacterial defense mechanism against bacteriophage is called

A. concatamerization
B. polymerization
C. restriction
D. lysogeny

Correct Answer: C. restriction

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