Explore topic-wise MCQs in Testing Subject.

This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.

1.

At what temperature incubation is required for the adsorption of phage T4 and DNA injection into E.coli?

A. 50 degree C
B. 15 degree C
C. 37 degree C
D. 80 degree C
Answer» D. 80 degree C
Discussion
2.

Human pathogen of a family 'arenavirus' is

A. Rabies virus
B. Herpes virus
C. Lassa virus
D. Hepatitis delta virus
Answer» D. Hepatitis delta virus
Discussion
3.

Member of a family 'Reoviruses' that causes diarrhoea in infants is called

A. Congovirus
B. Rotavirus
C. Picornavirus
D. hepadnavirus
Answer» C. Picornavirus
Discussion
4.

Enzyme neuraminidase is carried by which of the following viruses?

A. Human immunodeficiency virus
B. Epstein-Barr virus
C. Influenza virus
D. Adenovirus
Answer» D. Adenovirus
Discussion
5.

Cancer of the lip of mouth have been associated with ___________

A. HSV1
B. HSV2
C. EBV
D. SV 40
Answer» B. HSV2
Discussion
6.

Scrapie happens in which of following animals?

A. horse
B. cow
C. lamb
D. sheep
Answer» E.
Discussion
7.

Naked viruses with 'icosahedral' symmetry having double-stranded super coiled 'DNA' are known as

A. Papovavirus
B. Poxvirus
C. Parvovirus
D. Adenovirus
Answer» B. Poxvirus
Discussion
8.

In papovaviruses, DNA occurs in which of the following forms?

A. linear dsDNA
B. linear ssDNA
C. supercoiled circular dsDNA
D. supercoiled circular ssDNA
Answer» D. supercoiled circular ssDNA
Discussion
9.

Causative agent of tobacco mosaic disease was filterable.

A. True
B. False
C. May be
D. Can't say
Answer» B. False
Discussion
10.

Reverse transcriptase is present in which of following viruses?

A. picoRNAvirus
B. coronavirus
C. flavivirus
D. retrovirus
Answer» E.
Discussion
11.

Creutzfeldt-Jakob disease strikes which of following?

A. cows
B. sheep
C. lamb
D. humans
Answer» E.
Discussion
12.

Which of the following viruses belong/s to family caliciviridae?

A. Hepatitis B virus
B. Hepatitis D virus
C. Hepatitis E virus
D. All of these
Answer» D. All of these
Discussion
13.

Which of the following specimens contain/s hepatitis B virus in an infected person?

A. Blood
B. Semen
C. Saliva
D. All of these
Answer» E.
Discussion
14.

The DNA of phage lambda is circular both in the virion and in the host cell.

A. True
B. False
C. May be
D. Can't say
Answer» C. May be
Discussion
15.

Which of following scientists was first to discover concept of viruses?

A. Adolf Mayer
B. Dimitri Ivanowsky
C. Beijerinck
D. Watson
Answer» D. Watson
Discussion
16.

Which of the following are characteristics of the process viropexis?

A. phagocytic process
B. plant viruses penetrate host cells through ectodesmata
C. occurs by the enzyme RNA polymerase
D. phagocytic process and occurs by the enzyme lysosomal proteases
Answer» E.
Discussion
17.

Parvoviruses contain how many genes?

A. 100 genes
B. 500 genes
C. 40 genes
D. 3 genes
Answer» E.
Discussion
18.

RNA in animal viruses exist as circular dsRNA.

A. True
B. False
C. May be
D. Can't say
Answer» C. May be
Discussion
19.

In which of the following viruses DNA forms hairpins?

A. parvoviruses
B. herpesviruses
C. poxviruses
D. picornaviruses
Answer» B. herpesviruses
Discussion
20.

What is the shape of helical phages?

A. regular solids
B. polyhedra
C. rod-shaped
D. icosahedral
Answer» D. icosahedral
Discussion
21.

Pleomorphic viruses possess double-stranded DNA.

A. True
B. False
C. May be
D. Can't say
Answer» B. False
Discussion
22.

The nucleic scid core of phages is covered by a protein coat known as _______________

A. capsomere
B. capsid
C. outer envelope
D. nuclear membrane
Answer» C. outer envelope
Discussion
23.

Which of the following is true for the bacteriophage MV-L2 ?

A. head is made up of large capsomeres
B. head is made up of small capsomeres
C. no contractile sheath is present
D. filamentous form
Answer» E.
Discussion
24.

The most complex type of bacterial virus has which of the following morphological features?

A. hexagonal head and tail fibres
B. no contractile sheath
C. hexagonal head but no tail
D. hexagonal head,rigid tail with contractile sheath
Answer» E.
Discussion
25.

WHICH_OF_THE_FOLLOWING_METHOD_IS_USED_FOR_THE_PRODUCTION_OF_VACCINES_AGAINST_YELLOW_FEVER??$

A. tissue-culture method
B. chick-embryo method
C. through susceptible animals
D. through appropriate media
Answer» C. through susceptible animals
Discussion
26.

The_karyotype_of_cells_formed_from_continuous_cell_lines_is________________$

A. haploid
B. diploid
C. aneuploid
D. haploid and diploid
Answer» D. haploid and diploid
Discussion
27.

For the cultivation of viruses the fertile chicken eggs should be incubated for how many day(s)?

A. 1
B. 2-4
C. 5-12
D. 2-7
Answer» D. 2-7
Discussion
28.

Cowpea virus belongs to which of the following group of viruses?

A. Comovirus
B. Dianthovirus
C. Cucumovirus
D. Carlavirus
Answer» B. Dianthovirus
Discussion
29.

The family of Rhabdoviridae possesses dsRNA.

A. True
B. False
Answer» C.
Discussion
30.

Which of the following viruses have a complex symmetry?

A. Alphavirus
B. Mobillivirus
C. Orthopoxvirus
D. Parvovirus
Answer» D. Parvovirus
Discussion
31.

Which of the following viruses possess an envelope?

A. Herpesvirus
B. Reovirus
C. Tobacco mosaic virus
D. Papillomavirus
Answer» B. Reovirus
Discussion
32.

Rous sarcoma virus consists of RNA as its genetic material.

A. True
B. False
Answer» B. False
Discussion
33.

Enterovirus belongs to which of the following family of viruses?

A. Tymovirus
B. Picornaviridae
C. Reoviridae
D. Closterovirus
Answer» C. Reoviridae
Discussion
34.

How many dsRNA segments are present in the reovirus genome?

A. 1
B. 3
C. 50
D. 10
Answer» E.
Discussion