Bacteriophages – Section 1


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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
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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
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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
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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
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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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