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Viruses From Animal and Plants MCQ Questions & Answers

Viruses From Animal and Plants MCQs : This section focuses on the "Viruses From Animal and Plants". These Multiple Choice Questions (MCQs) should be practiced to improve the Viruses From Animal and Plants skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

The transcription of the viral nucleic acid into mRNA is not necessary in case of

A. RNA viruses
B. ds DNA viruses
C. ss DNA viruses
D. All of the above

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Question 2

Animal viruses with capsids displaying helical symmetry include

A. measles and mumps
B. influenza
C. rabies
D. all of these

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Question 3

Which of the following reflects the correct order of events that take place during the multiplication of a virus?

A. Attachment, penetration, maturation, biosynthesis, release
B. Penetration, attachment, biosynthesis, maturation, release
C. Attachment, penetration, biosynthesis, maturation, release
D. Attachment, release, biosynthesis, maturation, penetration

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Question 4

Viral matrix proteins are

A. exposed on the surface of the virus
B. found mainly on naked viruses
C. anchor the envelope of enveloped viruses
D. part of the nucleoprotein core of viruses

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Question 5

Intracytoplasmic inclusion bodies are found in cells infected with

A. Rabies virus
B. Vaccinia virus
C. Fowlpox virus
D. All of the above

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Question 6

Which type of interferon is produced by virus-infected cells?

A. α
B. β
C. Both A and B
D. None of these

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Question 7

The reovirus and influenza virus contain

A. 10 different segments of dsRNA and 8 different segments of ssRNA respectively
B. 8 different segments of dsRNA and 10 different segments of ssRNA respectively
C. 5 different segments of dsRNA and 7 different segments of ssRNA respectively
D. 7 different segments of dsRNA and 5different segments of ssRNA respectively

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Question 8

The nucleocapsid is covered by an outer membrane like structure called

A. envelope
B. covering
C. membronocapsid
D. all of these

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Question 9

Which type of interferon is produced by T lymphocytes?

A. α
B. β
C. γ
D. γ and β

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Question 10

Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because they

A. use it to terminate transcripts when they copy host cell mRNA
B. have to make a positive strand copy that can be translated
C. use it to modify host enzymes that are recruited for viral replication
D. none of the above

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Question 11

Plant viruses penetrate host cells through transient ores called

A. ectodesmata
B. endodesmata
C. cytodesmata
D. protodesmata

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Question 12

The nucleocapsid is covered by an outer membrane like structure called

A. envelope
B. covering
C. membronocapsid
D. All of the above

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Question 13

Transfer of infection from cell to cell occurs mainly by direct transfer of virions via

A. plasmodesmata
B. cytodesmata
C. protodesmata
D. None of these

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Question 14

The structural abnormality of cells is termed as

A. hyperplasia
B. anaplasia
C. metastasis
D. all of these

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Question 15

Which of the following virus is transmitted by the respiratory route?

A. Rhinovirus
B. Coronavirus
C. Measles virus
D. All of these

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Question 16

Fluorescence microscopy can be used for the diagnosis of

A. Subacute sclerosing panencephalitis
B. Herpes simplex encephalitis
C. Rabies
D. All of these

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Question 17

The tissue structure deteriorates as the virus multiplies. This deterioration is called

A. aneuploidy
B. protopathic effect
C. cytopathic effect
D. none of these

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Question 18

Supercoiling refers to the extra turns in the structure of ds DNA due to the action of

A. DNA gyrase
B. DNA pyrase
C. RNA gyrase
D. RNA pyrase

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Question 19

Icosahedral viruses are generally

A. polio viruses
B. adeno viruses
C. both (a) and (b)
D. none of these

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Question 20

Mumps vaccine is prepared from the cultures of

A. chick fibroblasts
B. African green monkey cells
C. healthy calves
D. sheep

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Question 21

The RNA sarcoma viruses, the most strongly transforming viruses may transform which of the following cells in a culture?

A. fibroblasts
B. myoblasts
C. iris epithelial
D. all of these

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Question 22

Influenza virus undergoes antigenic shift resulting in major antigenic changes by which of the following mechanisms?

A. Somatic recombination of heavy and light chains
B. Expression of several different capsule types
C. Changing the receptor binding canyon that docks with the host receptor
D. Reassortment of RNA segments from different influenza viruses

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Question 23

Icosahedral viruses are generally

A. polio viruses
B. adeno viruses
C. Both A and B
D. None of these

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Question 24

What is the function of positive strand in double stranded RNA viruses?

A. Synthesis of protein
B. Production of ribosomes
C. Both (a) and (b)
D. None of these

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Question 25

The two major components of viruses are

A. fat and protein
B. nucleic acid and protein
C. carbohydrate and nucleic acid
D. fat and carbohydrate

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Question 26

Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because they

A. use it to terminate transcripts when they copy host cell mRNA
B. have to make a positive strand copy that can be translated
C. use it to modify host enzymes that are recruited for viral replication
D. None of these

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Question 27

Interanuclear inclusion bodies are found in cells infected with

A. Parvoviruses
B. Herpesviruses
C. Adenoviruses
D. All of the above

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Question 28

What is the function of positive strand in double stranded RNA viruses?

A. Synthesis of protein
B. Production of ribosomes
C. Both A and B
D. None of these

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Question 29

Animal viruses with capsids displaying helical symmetry include

A. measles and mumps
B. influenza
C. rabies
D. All of the above

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Question 30

The penetration of animal viruses into attached cells occur by mechanisms consisting of engulfment of whole virions by the cells in a phagocytic process called

A. vitropexis
B. viropexis
C. ectodesmata
D. vivopexis

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Question 31

Intracytoplasmic inclusion bodies are found in cells infected with

A. Rabies virus
B. Vaccinia virus
C. Fowlpox virus
D. all of these

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Question 32

Fluorescence microscopy can be used for the diagnosis of

A. Subacute sclerosing panencephalitis
B. Herpes simplex encephalitis
C. Rabies
D. All of the above

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Question 33

The microbes which are most likely to be completely dependent on a plant or animal host are

A. viruses
B. bacteria
C. fungi
D. algae

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Question 34

The transcription of the viral nucleic acid into mRNA is not necessary in case of

A. RNA viruses
B. ds DNA viruses
C. ss DNA viruses
D. all of these

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Question 35

Viropexis takes place in the phagocytic vacuoles and is due to the action of enzymes

A. DNA gyrase
B. lysosomal protease
C. lysosomal lipase
D. all of these

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Question 36

West Nile virus can cause a disease in human beings that may be transmitted from an infected bird to a person by a mosquito. This is an example of

A. endogenous infection
B. fomite borne disease
C. arthropod borne disease
D. nosocomial infection

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Question 37

Which of the following characteristics would not be used to classify viruses?

A. Type of cell wall structure
B. Type of nucleic acid
C. Presence of an envelope
D. Symmetry

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Question 38

The uncontrolled proliferation of cells is termed as

A. hyperplasia
B. anaplasia
C. metastasis
D. all of these

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Question 39

What does the positive strand in double stranded RNA viruses stands for?

A. rRNA
B. tRNA
C. mRNA
D. None of these

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Question 40

Which of the following virus is transmitted by genital route?

A. Papillomaviruses
B. Herpes simplex virus type 2
C. Hepatitis B virus
D. All of these

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Question 41

Which type of interferon is produced by virus-infected cells?

A. α
B. β
C. Both (a) and (b)
D. None of these

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Question 42

What can be coated to the plastic dish if an ELISA is performed to directly detect polio virus?

A. Patient serum
B. Anti-polio antibody
C. Polio capsid protein
D. Colored substrate

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Question 43

Negri bodies are found in cells infected with

A. Paramyxoviruses
B. Vaccinia virus
C. Fowlpox virus
D. Rabies virus

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Question 44

Interanuclear inclusion bodies are found in cells infected with

A. Parvoviruses
B. Herpesviruses
C. Adenoviruses
D. all of these

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Question 45

The predominant lipid substance found in the viral envelope is

A. phospholipids
B. glycolipids
C. neutral fat
D. All of these

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