Viruses and Viroids: MCQs Quiz – 2 2

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Viruses and Viroids: MCQs (Multiple Choice Questions) on Viruses and Viroids. Quiz Test No. 2

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Viruses and Viroids: MCQs Quiz - 2

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Question 1
dsRNA is found in
A
Influenza virus
B
Retrovirus
C
Reovirus
D
TMP
Question 2
Which one of the followings is a viral disease?
A
Wilting of cabbage
B
Leaf roll of potato
C
Red rot of sugar cane
D
Damping-off disease of seedlings
Question 3
Cauliflower mosaic virus contains
A
ds DNA
B
ds RNA
C
ss RNA
D
ss DNA
Question 4
ELISA is used to detect viruses where the key reagent is
A
DNA probe
B
Catalase
C
Alkaline phosphatase
D
RNase
Question 5
Due to discovery of which of the following in 1980, the evolution was termed as RNA world
A
RNA have enzymatic property
B
In some virus RNA is genetic material
C
m-RNA, t-RNA- r-RNA synthesize proteins
D
RNA is not found in all cells
Question 6
Tailed bacteriophages are
A
Motile on surface of bacteria
B
Motile on surface of plant leaves
C
Actively motile in water
D
Non-motile
Question 7
One important characteristic of viruses is that they
A
Have an independent metabolism
B
Can be cultured in a cell-free medium
C
Can multiply outside a living cell
D
Do not have an independent metabolism
Question 8
Virus are living, because
A
Carry metabolic activity
B
Carry anaerobic respiration
C
Multiply in host cells
D
Cause infection
Question 9
DNA is not present in one of the following
A
Bacteriophage
B
Tobacco Mosaic Virus
C
Mitochondria
D
Chloroplast
Question 10
Which of the following is a bacteriophage?
A
Bacteria infecting viruses
B
Vibrio bacteria
C
Virus inhabiting in bacteria
D
Cyanobacteria
Question 11
Which of the following statements is not true for retroviruses?
A
Retroviruses are causative agents for certain kinds of cancer in man
B
The genetic material in mature retroviruses is RNA
C
Retroviruses carry gene for RNA-dependent DNA polymerase
D
DNA is not present at any stage in the life cycle of retroviruses.
Question 12
Viruses are no more "alive" than isolated chromosomes because
A
They both require oxygen for respiration
B
They both need food molecules
C
They require both RNA and DNA
D
Both require the environment of a cell to replicate
Question 13
Which statement is correct for bacterial transduction?
A
Bacteria obtained its DNA directly
B
Transfer of some genes from one bacteria to another bacteria by conjugation
C
Transfer of some genes from one bacteria to another bacteria through virus
D
Bacteria obtained DNA from other external source
Question 14
Which of the following statements is true about viruses?
A
All viruses known to man are obligate parasites
B
Viruses are capable of performing metabolic activities on their own
C
Viruses are filterable facultative parasites
D
Some viruses have cellular structure and are saprophytes
Question 15
How does enveloped virus enter into host cells?
A
by phagocytosis
B
by contact with ceil receptor and endocytosis
C
by injecting its own nucleic acid inside the host cells
D
by fusion with the plasma membrane of host
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2 thoughts on “Viruses and Viroids: MCQs Quiz – 2”

  • Reply ↓
    Raja.R.Rao.C

    Answer to the last question in this quiz is not just the 4th option but also the 2nd option.
    (Refer to ‘viral entry’ from Wikipedia for more details)