MCQ ON VIRUSES | MICROBIOLOGY MCQ WITH ANSWER KEY | MICROBIOLOGY NOTES | S.Y B .PHARM SEM-III

MICROBIOLOGY MCQ 

MULTIPLE CHOICE QUESTIONS

VIRUSES

1. Viruses require __________ for growth

  A) bacteria 
B) plants
C) animals
D) living cells

... Answer is D)
Viruses require living cells for growth "

2. The size of viruses is usually measured in

A) centimeters
B) micrometers
C) nanometers
D) millimeters

... Answer is C)
The size of viruses is usually measured in nanometers .

3. A virus is made up of _______.

A) Protein coat and nucleic acid
B) Nucleic acid and cell membrane
C) Nucleic acid, cell wall and cell membrane
D) Protein coat and mitochondria

... Answer is A)
A virus is made up of Protein coat and nucleic acid

4.Which of the following is the genome of the virus?

A) RNA
B) DNA
C) DNA or RNA
D) None of the above

... Answer is C)
The genome of the virus is DNA or RNA "

5. The viral envelope is made up of _______.

A) Proteins
B) Glycoproteins
C) Lipids and Proteins
D) All of the above

... Answer is D)
The viral envelope is made up of Proteins,Glycoproteins and Lipids and Proteins .

6. 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

... Answer is B)
viruses are Obligate parasites .

7. A fully formed infectious viral particle is called _________.

A) Virion
B) virus
C) Capsid
D) Viriod

... Answer is A)
A fully formed infectious viral particle is called Virion

8. Viruses that attack bacteria are called_______.

A) Lysophage
B) Bacteriophage
C) Protophage
D) Virophage

... Answer is B)
Viruses that attack bacteria are called Bacteriophage .

9. Viruses are ………….

A) Smallest known infective agant
B) ultra-microscopic
C) Obligate parasites
D)All of the above

... Answer is D)
Viruses are Smallest known infective agant ultra-microscopic Obligate parasites .

10.The embryonated hens’ egg was first used for cultivation of virus by

A) Louis Pasteur
B) knol & Ruska
C) Robert koch
D) woodruff, Good Pasteur & Burnett.

... Answer is D)
The embryonated hens’ egg was first used for cultivation of virus by woodruff, Good Pasteur & Burnett "

11. 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

... Answer is C)
The main functions of the capsid is to Determines the antigenic specificity of the virus and Protects genetic material from nuclease attack "

12. The spike-like projections on the viral capsid are known as

A) Prion
B) Virion
C) Peplomers
D) capsomeres

... Answer is C)
The spike-like projections on the viral capsid are known as Peplomers.

13.Viral genome inserted to the bacterial DNA is termed as_______.

A) Virulent phage
B) Lytic cycle
C) Prophage
D) Lysogic cycle

... Answer is C)
Viral genome inserted to the bacterial DNA is termed as Prophage

14.Bacteriophages that induce bacterial cell lysis are called_______.

A) Lytic Phages
B) Virulent phages
C) Lysogenic phages
D) Temperate phages

... Answer is B)
Bacteriophages that induce bacterial cell lysis are called Virulent phages

15. Which of the following statements are true about the capsomeres?

A) It is a unit of nucleic acid in viruses
B) It is an individual unit of the capsid
C) Both A & B is right
D) Only A is right

... Answer is B)
capsomeres is an individual unit of the capsid.

16. The first step in infection of a host bacterial cells by a phage is called

A) adsorption
B) penetration
C) replication
D) release

... Answer is A)
The first step in infection of a host bacterial cells by a phage is called adsorption.