Viruses From Animal and Plants problems
- 1. Viral matrix proteins are
Options- A. exposed on the surface of the virus
- B. found mainly on naked viruses
- C. anchor the envelope of enveloped viruses
- D. part of the nucleoprotein core of viruses Discuss
Correct Answer: anchor the envelope of enveloped viruses
- 2. Fluorescence microscopy can be used for the diagnosis of
Options- A. Subacute sclerosing panencephalitis
- B. Herpes simplex encephalitis
- C. Rabies
- D. All of these Discuss
Correct Answer: All of these
- 3. Plant viruses penetrate host cells through transient ores called
Options- A. ectodesmata
- B. endodesmata
- C. cytodesmata
- D. protodesmata Discuss
Correct Answer: ectodesmata
- 4. Icosahedral viruses are generally
Options- A. polio viruses
- B. adeno viruses
- C. both (a) and (b)
- D. none of these Discuss
Correct Answer: both (a) and (b)
- 5. Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because they
Options- A. use it to terminate transcripts when they copy host cell mRNA
- B. have to make a positive strand copy that can be translated
- C. use it to modify host enzymes that are recruited for viral replication
- D. none of the above Discuss
Correct Answer: have to make a positive strand copy that can be translated
- 6. Which of the following virus is transmitted by genital route?
Options- A. Papillomaviruses
- B. Herpes simplex virus type 2
- C. Hepatitis B virus
- D. All of these Discuss
Correct Answer: All of these
- 7. Supercoiling refers to the extra turns in the structure of ds DNA due to the action of
Options- A. DNA gyrase
- B. DNA pyrase
- C. RNA gyrase
- D. RNA pyrase Discuss
Correct Answer: DNA gyrase
- 8. Which of the following virus is transmitted by the respiratory route?
Options- A. Rhinovirus
- B. Coronavirus
- C. Measles virus
- D. All of these Discuss
Correct Answer: All of these
- 9. Transfer of infection from cell to cell occurs mainly by direct transfer of virions via
Options- A. plasmodesmata
- B. cytodesmata
- C. protodesmata
- D. none of these Discuss
Correct Answer: plasmodesmata
- 10. The tissue structure deteriorates as the virus multiplies. This deterioration is called
Options- A. aneuploidy
- B. protopathic effect
- C. cytopathic effect
- D. none of these Discuss
Correct Answer: cytopathic effect
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