Free Viruses MCQs with Answers

• A. Venome
• B. Genome
• C. Virion
• D. Capsid

Explanation: The complete, mature, and infectious virus particle is known as a virion

• A. They survive for a short time
• B. Their envelope is not sensitive to sunlight
• C. They are tolerant to antibodies
• D. Envelope is derived from host

Explanation: Enveloped virus is a virus that has an outer wrapping or envelope. This envelope comes from the infected cell, or host, in a process…

• A. Venome
• B. Genome
• C. Virion
• D. Capsid

Explanation: a. Venome:"Venome" is not a recognized term in the context of virology or viruses.

• A. lysosomes
• B. lysozymes
• C. ligase
• D. both a and b

Explanation: Option A: Lysosomes are organelles found in animal cells that contain various enzymes capable of breaking down cellular waste and foreign…

• A. 162
• B. 200
• C. 234
• D. 155

Explanation: Option A: This option states that the number of capsomeres found in the herpes virus capsid is 162.

• A. Lysogenic cycle
• B. Lytic cycle
• C. Both
• D. None

Explanation: The lysogenic cycle is a type of viral replication cycle that occurs in certain types of viruses, including bacteriophages, which infect…

• A. Virulent phage
• B. Lytic phage
• C. Temperate phage
• D. Both a and b

Explanation: A and B. The phage that causes the lytic cycle is called a lytic phage or virulent phage.

• A. RNA
• B. Enzyme
• C. Protective protein coat
• D. All of these

Explanation: Viroids are small, circular, single-stranded RNA molecules that are infectious agents of plants.

• A. Protein
• B. Lipids
• C. DNA
• D. RNA

Explanation: All viruses contain genetic material (either DNA or RNA) and a protein coat, not all viruses contain lipids.

• A. Lysogenic cycle
• B. Lytic cycle
• C. Both
• D. None of the above

Explanation: The bacteriophage incorporates in the host genome in the lysogenic cycle.

• A. 150 nm
• B. 100 nm
• C. 200 nm
• D. 250 nm

Explanation: The virions are 80-100 nm in diameter, and their outer lipid envelope incorporates and displays the viral glycoproteins (Fig. 1).

• A. Entomology
• B. Virology
• C. Epidemiology
• D. Bacteriology

Explanation: Virology is the scientific discipline concerned with the study of the biology of viruses and viral diseases, including the distribution…

• A. Capsid
• B. Matrix protein
• C. Envelope
• D. Nuclear capsid

Explanation: Some viruses have a protein lattice underneath their envelope called matrix.

• A. 20 to 2000 times
• B. 10 to 1000 times
• C. 500 times
• D. 3000 times

Explanation: A virus ranges in size from 20-250 nanometers making them about a hundred times smaller than most bacteria.

• A. 1935
• B. 1930
• C. 1932
• D. 1920

Explanation: Tobacco mosaic virus was the first virus to be crystallized. It was achieved by Wendell Meredith Stanley in 1935 who also showed that TMV…

• A. Lytic phage
• B. Lysogenic phage
• C. The viral capsid
• D. An infectious and fully forward viral particle

Explanation: A complete mature,infectious particle having inner nucleic acid and capsid around it is called a virion.

• A. Adenovirus
• B. Pox virus
• C. Influenza virus
• D. Paramyxoviruses

Explanation: Mumps, like measles, is a disease caused by an RNA virus classified in the "Paramyxoviridae" family.

• A. DNA enveloped virus
• B. RNA enveloped virus
• C. DNA virus
• D. RNA naked virus

Explanation: HBV (Hepadna virus) virus is a DNA-enveloped virus it is the cause of hepatitis B. So, option A is accurate.

• A. They are too small
• B. They have no cell wall
• C. They lack metabolic machinery
• D. All of the options are correct

Explanation: Viruses lack metabolic machinery thus they can not replicate themselves. So, option C is accurate.

• A. DNA and RNA
• B. DNA
• C. RNA
• D. DNA or RNA

Explanation: Option D is correct. Viruses can have either DNA or RNA as their genetic material.