1. A virus is made up of _______.
(a) Protein coat and nucleic acid
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(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
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(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
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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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Category: WHICH
