1. Influenza virus undergoes antigenic shift resulting in major antigenic changes by which of the following mechanisms?
2. The nucleocapsid is covered by an outer membrane like structure called
3. Which type of interferon is produced by virus-infected cells?
4. Fluorescence microscopy can be used for the diagnosis of
5. Viral matrix proteins are
6. Mumps vaccine is prepared from the cultures of
7. The microbes which are most likely to be completely dependent on a plant or animal host are
8. The two major components of viruses are
9. The transcription of the viral nucleic acid into mRNA is not necessary in case of
10. West Nile virus can cause a disease in human beings that may be transmitted from an infected bird to a person by a mosquito. This is an example of
11. What does the positive strand in double stranded RNA viruses stands for?
12. Which of the following characteristics would not be used to classify viruses?
13. Interanuclear inclusion bodies are found in cells infected with
14. The reovirus and influenza virus contain
15. Which type of interferon is produced by T lymphocytes?
16. Transfer of infection from cell to cell occurs mainly by direct transfer of virions via
17. Intracytoplasmic inclusion bodies are found in cells infected with
18. What is the function of positive strand in double stranded RNA viruses?
19. Which of the following virus is transmitted by the respiratory route?
20. The predominant lipid substance found in the viral envelope is
21. Supercoiling refers to the extra turns in the structure of ds DNA due to the action of
22. The tissue structure deteriorates as the virus multiplies. This deterioration is called
23. The structural abnormality of cells is termed as
24. The penetration of animal viruses into attached cells occur by mechanisms consisting of engulfment of whole virions by the cells in a phagocytic process called
25. Viropexis takes place in the phagocytic vacuoles and is due to the action of enzymes