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Microbiology Practice Test: Viruses of Bacteria
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Avg score: 65% • Most missed: “The protein coat of the virus remains outside the host cell.”

Viruses of Bacteria topics include: Phages structure and morphology, bacterial viruses replication, lysogeny and lytic.
 

Bacteriophages, also known as phages, are viruses that infect and replicate in bacterial cells. They are the most abundant biological agent on earth and are found everywhere in the environment.

 

Related: Microbiology Practice Test: The World of Bacteria

Microbiology Practice Test: Viruses of Bacteria
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25 Questions

1. Which of the following phage do not cause lysogeny?
2. What does a viral DNA becomes after being associated with the bacterial chromosome?
3. What is the shape of helical phages?
4. cro gene is an example of an immunity repressor.
5. Which of the following coliphage has tadpole shape?
6. In which of the following phage prophage exists as a circular form?
7. In the growth curve of plaque-forming units, the time from infection until lysis is known as ____________________
8. Which of the following are said to have binal symmetry?
9. The most complex type of bacterial virus has which of the following morphological features?
10. The delayed early genes codes for which of the following enzymes?
11. Which of the following is a family of lambda phage viruses?
12. What is the colour of the plaque formed?
13. The DNA of phage lambda is circular both in the virion and in the host cell.
14. The nucleic acid core of phages is covered by a protein coat known as _______________
15. The protein integrase is encoded by which of the following gene?
16. repressor protein makes the cell resistant to lysis.
17. At what temperature incubation is required for the adsorption of phage T4 and DNA injection into E.coli?
18. Pleomorphic viruses possess double-stranded DNA.
19. The protein coat of the virus remains outside the host cell.
20. Which of the following is true for the bacteriophage MV-L2?
21. Which of the following gene codes for an enzyme which directs the insertion of the phage DNA into the bacterial chromosome?
22. Which of the following is the characteristic of repressor protein?
23. Which of the following is the first step in replication by bacterial phages?
24. Which of the following are filamentous phage of E.coli?
25. Which of the following enzymes transcribe late genes?

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