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
Animal viruses with capsids displaying helical symmetry include
A. measles and mumps
B. influenza
C. rabies
D. All of the above
Question 2
Icosahedral viruses are generally
A. polio viruses
B. adeno viruses
C. Both A and B
D. None of these
Question 3
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
Question 4
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
Question 5
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
Question 6
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
Question 7
The nucleocapsid is covered by an outer membrane like structure called
A. envelope
B. covering
C. membronocapsid
D. All of the above
Question 8
Which type of interferon is produced by virus-infected cells?
A. α
B. β
C. Both A and B
D. None of these
Question 9
Fluorescence microscopy can be used for the diagnosis of
A. Subacute sclerosing panencephalitis
B. Herpes simplex encephalitis
C. Rabies
D. All of the above
Question 10
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
Question 11
Mumps vaccine is prepared from the cultures of
A. chick fibroblasts
B. African green monkey cells
C. healthy calves
D. sheep
Question 12
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
Question 13
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
Question 14
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
Question 15
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
Question 16
What does the positive strand in double stranded RNA viruses stands for?
A. rRNA
B. tRNA
C. mRNA
D. None of these
Question 17
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
Question 18
Interanuclear inclusion bodies are found in cells infected with
A. Parvoviruses
B. Herpesviruses
C. Adenoviruses
D. All of the above
Question 19
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
Question 20
Which type of interferon is produced by T lymphocytes?
A. α
B. β
C. γ
D. γ and β
Question 21
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
Question 22
Intracytoplasmic inclusion bodies are found in cells infected with
A. Rabies virus
B. Vaccinia virus
C. Fowlpox virus
D. All of the above
Question 23
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
Question 24
Which of the following virus is transmitted by the respiratory route?
A. Rhinovirus
B. Coronavirus
C. Measles virus
D. All of these
Question 25
The predominant lipid substance found in the viral envelope is
A. phospholipids
B. glycolipids
C. neutral fat
D. All of these
Question 26
Animal viruses with capsids displaying helical symmetry include
A. measles and mumps
B. influenza
C. rabies
D. all of these
Question 27
Fluorescence microscopy can be used for the diagnosis of
A. Subacute sclerosing panencephalitis
B. Herpes simplex encephalitis
C. Rabies
D. All of these
Question 28
Icosahedral viruses are generally
A. polio viruses
B. adeno viruses
C. both (a) and (b)
D. none of these
Question 29
Interanuclear inclusion bodies are found in cells infected with
A. Parvoviruses
B. Herpesviruses
C. Adenoviruses
D. all of these
Question 30
Intracytoplasmic inclusion bodies are found in cells infected with
A. Rabies virus
B. Vaccinia virus
C. Fowlpox virus
D. all of these
Question 31
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
Question 32
Negri bodies are found in cells infected with
A. Paramyxoviruses
B. Vaccinia virus
C. Fowlpox virus
D. Rabies virus
Question 33
Plant viruses penetrate host cells through transient ores called
A. ectodesmata
B. endodesmata
C. cytodesmata
D. protodesmata
Question 34
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
Question 35
The nucleocapsid is covered by an outer membrane like structure called
A. envelope
B. covering
C. membronocapsid
D. all of these
Question 36
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
Question 37
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
Question 38
The structural abnormality of cells is termed as
A. hyperplasia
B. anaplasia
C. metastasis
D. all of these
Question 39
The tissue structure deteriorates as the virus multiplies. This deterioration is called
A. aneuploidy
B. protopathic effect
C. cytopathic effect
D. none of these
Question 40
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
Question 41
The uncontrolled proliferation of cells is termed as
A. hyperplasia
B. anaplasia
C. metastasis
D. all of these
Question 42
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
Question 43
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
Question 44
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
Question 45
Which type of interferon is produced by virus-infected cells?
A. α
B. β
C. Both (a) and (b)
D. None of these