Virus MCQ Question Answer For HPTET Medical Exam

Virus MCQ Question Answer For HPTET Medical Exam

||Virus MCQ  For HPTET Medical Exam||Virus  Question Answer For HPTET Medical Exam||

Virus MCQ Question Answer For HPTET Medical Exam


1. Plant viruses usually contain:

(a) RNA

(b) DNA

(C) DNA and RNA

 (d) DNA or RNA


2. Viruses were discovered by :

(a) Stanley 

(b) Ivanowski

(c) Twort

(d) Herelle


3. Viruses are defined as :

(a) a bunch of genomes which are looking for a suitable host for replication

(b) micro-organisms which contains DNA only

(c) smallest micro-organisms causing disease

(d) micro-organisms which contains RNA only


4. RNA particles causing symptoms like those of viral diseases is known as :

(a) virion

(b) vira

(c) viroid 

(d) None of these


5. Coliphage X 174 contains :

(a) double stranded RNA

(b) single stranded DNA

(c) double stranded DNA

(d) single stranded RNA


6. Viruses differ from living organisms in that, they :

(a) can grow inside a living host

(b) can multiply inside a living host

(c) can undergo mutation inside a living host

(d) are non-cellular


7. Virus which attacks E.coli is called :

(a) bacteriophage 

(b) coliphage

c) phytophage

 (d) zoophage


8. Virus is a...... ....stage between living and non-living.

(a) balanced

 (b) threshold

(c) transitional

(d) None of these


9. The virus DNA which is incorporated into bacterial DNA is termed as :

(a) episome 

(b) mesosome

(C) free DNA 

(d) T-phage


10. Virus was crystallized and isolated first by :

(a) J.D. Ivanowski

 (b) F.C. Bawden

(c) W.M. Stanley

 (d) K.M. Smith


11. Little leaf disease of brinjal is caused by :

(a) viruses

(b) bacteria

(c) fungi

 (d) None of these


12. The smallest virus has a size of:

(a) 1 nm

 (b) 3 nm

(c) 6 nm

(d) 2 nm


13. Which of the following is devoid of protein coat, with a constitution of RNA only?

(a) Tobacco mosaic virus

(b) Poxvirus

(c) Potato spindle tuber virus

(d) None of the above


14. Genetic modification brought about by a virus in a bacteria is known as :

(a) transformation

 (b) transduction

c) conjugation 

(d) candidiasis


15. Viruses are believed to be :

(a) living organisms

(b) non-living organisms

(c) a transitional group between living and non-living world

(d) living organisms which have lost the power of multiplication


16. Influenza virus contains :

(a) DNA

(b) RNA

c) Both (a) and (b)

 (d) None of these


17. Edward Jenner discovered :

(a) vaccination against small pox

(b) vaccination against chicken pox

(c) immunization against small pox

(d) immunization against chicken pox


18. Roux Sarcoma virus contains :

(a) RNA

(b) DNA

(C) DNA and RNA 

(d) None of these


 19. Which of the following is a viral disease of potato ?

(a) Early blight of potato

(b) Late blight of potato

C) Leaf roll of potato

(d) None of the above


20. The term 'Virus' has been derived from a Latin word meaning:

(a) poison

 (b) secretion

c) cell

(d) venom


21. Which of the following is an example of DNA containing plant virus?

(a) Tobacco mosaic virus

(b) Potato mosaic virus

(c) Cauliflower mosaic virus

(d) Tomato mosaic virus


22. Rabies is caused by :

(a) viruses

 (b) slime moulds

(c) fungi

 (d) bacterium


23. A clear zone formed in a bacterial colony due to viral action is called :

a) plague 

(b) phage

C) streak

 (d) kranz


24. An antiviral substance produced by many vertebrates in response to viral infection for resisting the multiplication of viruses is known as:

(a) antivirin

 (b) antigen

(c) virion 

(d) interferon


25. Viruses with two types of symmetry, i.e., icosahedral head and helical tail are called:

(a) picornaviruses 

(b) binal viruses

(c) riboviruses 

(d) none of these


Directions Qs. 26-30: In each of the following questions, a statement of Assertion (A) is given followed by a corresponding statement of Reason(R) just below it. Of the statements, mark the correct answer:

(a) If both assertion and reason are true and reason is the correct explanation of assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of assertion

(c) If assertion is true but reason is false

(d) If assertion is false but reason is true.


26. Assertion (A): Viruses are living organisms.

Reason (R): They donot possess their own biochemical machinery,


27. Assertion (A): Lytic cycle is shown by a virulent phage.

Reason (R): The host cell undergoes lysis.


28. Assertion (A): All RNA viruses cannot directly multiply in host cells.

Reason (R): RNA viruses need reverse transcriptase to synthesize DNA.


29. Assertion (A): Some viruses cause cancer.

Reason (R): Cancer viruses trigger uncontrolled growth of cell.


30. Assertion (A): In lysogenic cycle, the host cell does not get lysed.

Reason (R): Viral genome is integrated with the host DNA

{Answer:- 26 :- D,27:- B,28:- D,29:- A,30:-A}

||Virus MCQ  For HPTET Medical Exam||Virus  Question Answer For HPTET Medical Exam||

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