Explore your knowledge of viruses with these 20 interesting MCQ on Virus that cover essential functions, structures, and diseases related to viruses. Each question is designed to test your understanding of gas exchange, viral anatomy, and the role of key components such as the capsid and genome. Answers are provided for self-assessment, making it perfect for students and enthusiasts alike!
MCQ on Virus
1. What is a virus 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
Answer: a) Protein coat and nucleic acid
2. Mumps is caused by:
a) Bacteria
b) Virus
c) Rhizopus
d) Animals
Answer: b) Virus
3. Which of the following viruses is known for causing latent infections?
a) Herpesvirus
b) Poliovirus
c) HIV
d) Rhinovirus
Answer: a) Herpesvirus
4. What is the fully formed infectious viral particle called?
a) Virion
b) Viroid
c) Capsid
d) Virusoid
Answer: a) Virion
5. Which virus infects the gastrointestinal tract?
a) Rubella virus
b) Norwalk virus
c) Mumps virus
d) Parvovirus
Answer: b) Norwalk virus
6. The largest virus is:
a) Megavirus chilensis
b) Arbo virus
c) Herpes virus
d) Mumps virus
Answer: a) Megavirus chilensis
7. Which of the following statements is true about viruses?
a) They are free-living
b) They are obligate parasites
c) Both (a) and (b)
d) None of the above
Answer: b) They are obligate parasites
8. Which virus is spread by arthropods?
a) HIV
b) Influenza virus
c) Arbovirus
d) Rhinovirus
Answer: c) Arbovirus
9. What forms the genetic component of viruses?
a) DNA or RNA
b) Proteins only
c) Lipids only
d) Carbohydrates only
Answer: a) DNA or RNA
10. Viruses are characterized by which of the following features?
a) They can reproduce independently.
b) They are acellular.
c) They have both DNA and RNA.
d) They have cellular organelles.
Answer: b) They are acellular
11. Which of the following viruses causes AIDS?
a) HIV
b) Influenza virus
c) Herpesvirus
d) Mumps virus
Answer: a) HIV
12. Which of the following viruses is known to promote cell death by apoptosis?
a) Rubella virus
b) HSV (Herpes Simplex Virus)
c) Vaccinia virus
d) Myxoma virus
Answer: a) Rubella virus .
13. What is the primary method by which viruses replicate?
a) Binary fission
b) Budding from host cells
c) Using the host’s cellular machinery
d) Photosynthesis
Answer: c) Using the host’s cellular machinery .
14. Which of the following viruses affects the liver?
a) Hepatitis B virus
b) Influenza virus
c) Norwalk virus
d) Mumps virus
Answer: a) Hepatitis B virus
15. What type of nucleic acid can viruses contain?
a) Only DNA
b) Only RNA
c) Both DNA and RNA
d) Neither DNA nor RNA
Answer: c) Both DNA and RNA (but not in the same virus). Viruses can have either single-stranded or double-stranded forms of these nucleic acids
16. Which of these diseases is caused by a virus?
a) Tuberculosis
b) Mumps
c) Malaria
d) Ringwor
Answer: b) Mumps
17. What is the main function of the viral capsid?
a) Energy production
b) Protecting genetic material
c) Metabolism
d) Cell division
Answer: b) Protecting genetic material
18. Viruses can be classified based on:
a) Their shape only
b) Their size only
c) Their nucleic acid type and structure
d) Their color
Answer: c). Their nucleic acid type and structure
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19. Which of the following viruses primarily affects plants?
a). Tobacco Mosaic Virus (TMV)
b). HIV
c). Influenza Virus
d). Herpes Simplex Virus
Answer: a). Tobacco Mosaic Virus (TMV)
20. The process by which viruses enter host cells is called:
a). Absorption
b). Penetration
c). Replication
d). Assembly
Answer: b). Penetration