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1. A virus is made up of _______.

1. A virus is made up of _______. (a) Protein coat and nucleic acid (b) Protein coat and mitochondria (c) Nucleic acid and cell membrane (d) Nucleic acid, cell wall and cell membrane Sol: (a) Protein coat and nucleic acid. 2. The protein coat of viruses that enclose the genetic material is called _______. (a) Virion (b) Capsid (c) Peplomers (d) Capsomers Sol:(b) Capsid. 3. Which of the following statements are true about a virion? (a) Lytic phage (b) Lysogenic phage (c) The viral capsid (d) An infectious and fully formed viral particle Sol: (d) An infectious and fully formed viral particle. 4. Which of the following is the genome of the virus? (a) DNA (b) RNA (c) DNA or RNA (d) DNA and RNA Sol:(c) DNA or RNA 5. Which of the following is the largest virus? (a) Megavirus chilensis (b) Arbo virus (c) Herpes virus (d) Mumps virus Sol: (a) Megavirus chilensis 6. Which of the following statements are true about the capsomeres? (a) It is an individual unit of the capsid (b) It is a viral protein for replication (c) It is a unit of nucleic acid in viruses (d) All of the above Sol: (a) It is an individual unit of the capsid. 7. Which of the following statements are true about the peplomeres? (a) It is an individual unit of capsids (b) It is a spike-like projection on the enveloped viruses (c) It is a projection on the viral membrane (d) It is a spike-like projection on the capsids Sol: (b) It is a spike-like projection on the enveloped viruses. 8. An icosahedral capsid consists of_____________. (a) Hexagonal capsomeres (b) Pentagonal capsomeres (c) Triangular capsomeres (d) Both a and b Sol: (d) Both a and b. 9. Which of the following has a complex symmetry? (a) T4 phage (b) Adenovirus (c) Influenza virus (d) All of the above Sol: (a) T4 phage. 10. The viral envelope is made up of _______. (a) Proteins (b) Glycoproteins (c) Lipids and Proteins (d) All of the above Sol: (d) All of the above 11. Which of the following is a helical virus? (a) TMV (b) T4 phage (c) Poxvirus (d) Herpes virus Sol: (a) TMV . 12. Which of the following statements are true about the viruses? (a) Free-living (b) Obligate parasites (c) Both (a) and (b) (d) None of the above Sol:(b) Obligate parasites. 13. A fully formed infectious viral particle is called _________. (a) Virion (b) Viriod (c) Capsid (d) Virusoid Sol: (a) Virion. 14. The genetic constituent of viruses is  ________. (a) RNA (b) DNA (c) ss DNA (d) DNA or RNA Sol:(d) DNA or RNA 15. The viral genome is enveloped in a protein coat known as (a) Capsid (b) Outer envelope (c) Capsomere (d) Nucleic Sol: (a) Capsid. 16. Which of the following statements are true about the tobacco mosaic virus (TMV)? (a) RNA virus (b) DNA virus (c) Bacteriophage(d) ss DNA or ds DNA Sol:(a) RNA virus. 17. The shape of the TMV is _______. (a) Rod-shaped (b) Oval shaped (c) Cuboidal shaped (d) Spherical shaped Sol:(a) Rod-shaped. 18. Viruses that attack bacteria are called_______. (a) Virophage (b) Lysophage (c) Bacteriophage (d) None of the above Sol:(c) Bacteriophage. 19. The T2 phage is called_______. (a) ss DNA phage (b) ss RNA phage (c) ds DNA phage (d) ds RNA phage Sol: (c) ds DNA phage. 20. Bacteriophages that induce bacterial cell lysis are called_______. (a) Viroids (b) Lysogenic phages (c) Virulent phages (d) Temperate phages Sol:(c) Virulent phages. 21. Which of the following virus has the smallest genome? (a)Rabies virus (b) Circovirus (c) Herpes virus (d) Mimi virus Sol:(b) Circovirus. 22. Infectious RNA particles without the protein coat are called_______. (a) Prion (b) Virion (c) Viroid (d) Virusoid Sol:(c) Viroid. 23. The spike-like projections on the viral capsid are known as (a) Viriod (b) Proteomes (c) Peplomers (d) capsomeres Sol:(c) Peplomers. 24. Viral genome inserted to the bacterial DNA is termed as_______. (a) Lysogeny (b) Prophage (c) Lytic cycle (d) Virulent phage Sol:(b) Prophage. 25. Which of the following are the main functions of the capsid? (a) Determines the antigenic specificity of the virus (b) Protects genetic material from nuclease attack (c) Both A and B (d) None of these Sol:(c) Both A and B.

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