MCQOPTIONS
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MCQOPTIONS
This section includes 334 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Which of following drug inhibits herpesvirus replication by affecting viral polymerase? |
| A. | acyclovir |
| B. | ribavirin |
| C. | antibiotic |
| D. | Adefovir |
| Answer» B. ribavirin | |
| 102. |
All viruses are haploid, except |
| A. | Influenza virus |
| B. | Retrovirus |
| C. | Pox viruses |
| D. | Parvovirus |
| Answer» C. Pox viruses | |
| 103. |
Which of following viruses causes encephalitis? |
| A. | west Nile virus |
| B. | Crimean congo |
| C. | dengue |
| D. | Ebola |
| Answer» B. Crimean congo | |
| 104. |
Diameter of 'hepadnavirus' is |
| A. | 75 nm |
| B. | 42 nm |
| C. | 55 nm |
| D. | 23 nm |
| Answer» C. 55 nm | |
| 105. |
Epstein-Barr viruses are associated with which of following cancers? |
| A. | breast cancer |
| B. | adult leukemia |
| C. | cervical cancer |
| D. | Burkitt's lymphoma |
| Answer» E. | |
| 106. |
Which of following is not a breast cancer subtype? |
| A. | luminal a |
| B. | luminal b |
| C. | her2 |
| D. | her3 |
| Answer» E. | |
| 107. |
What is shape of capsid in tobacco mosaic virus? |
| A. | rod shaped |
| B. | polyhedral |
| C. | hexamer |
| D. | irregular |
| Answer» B. polyhedral | |
| 108. |
Which of following diseases has been eradicated from world? |
| A. | polio |
| B. | measles |
| C. | shingles |
| D. | small pox |
| Answer» E. | |
| 109. |
Which of following is not an enveloped virus? |
| A. | picoRNAvirus |
| B. | coronavirus |
| C. | flavivirus |
| D. | Togavirus |
| Answer» B. coronavirus | |
| 110. |
A human pathogen called Hantavirus belongs to a family |
| A. | Bunyaviruses |
| B. | Coronavirus |
| C. | Picornavirus |
| D. | Rhabdoviruses |
| Answer» B. Coronavirus | |
| 111. |
Hepatitis 'B' virus is member of a family |
| A. | Adenovirus |
| B. | Papillomavirus |
| C. | Parvovirus |
| D. | hepadnavirus |
| Answer» E. | |
| 112. |
Which of the following nucleic acid is present in hepatitis B virus? |
| A. | dsDNA |
| B. | ssRNA |
| C. | ssDNA |
| D. | dsRNA |
| Answer» B. ssRNA | |
| 113. |
What is size of 'adenovirus' is |
| A. | 75 nm |
| B. | 55 nm |
| C. | 40 nm |
| D. | 22 nm |
| Answer» B. 55 nm | |
| 114. |
Pseudovirus have ability to infect cell, but , cannot |
| A. | Replicate |
| B. | Translate |
| C. | Divided |
| D. | Attach |
| Answer» B. Translate | |
| 115. |
Which of the following is semi-continuous (diploid) cell line? |
| A. | HeLa |
| B. | HEp-2 |
| C. | WI-38 |
| D. | KB |
| Answer» D. KB | |
| 116. |
Which of the following viruses are acid-labile? |
| A. | Rhinoviruses |
| B. | Echoviruses |
| C. | Polioviruses |
| D. | Coxsackieviruses |
| Answer» B. Echoviruses | |
| 117. |
What percentage of cancers worldwide is caused by viruses? |
| A. | 0.9 |
| B. | 0.15 |
| C. | 0.6 |
| D. | 0.7 |
| Answer» C. 0.6 | |
| 118. |
Human pathogens of family of 'togaviruses' includes alphavirus and |
| A. | Congovirus |
| B. | Rotavirus |
| C. | Rubivirus |
| D. | Adenovirus |
| Answer» D. Adenovirus | |
| 119. |
When capsomeres are arranged in 20 triangles, resulting structure is called as |
| A. | Helical |
| B. | Icosahedral |
| C. | Spiral |
| D. | Triangular |
| Answer» C. Spiral | |
| 120. |
In the simplest capsid, there is a capsomere at each of the 12 vertices; this capsomere, which is surrounded by five other capsomeres, is termed a |
| A. | penton |
| B. | polyhedra |
| C. | icosahedral |
| D. | helical |
| Answer» B. polyhedra | |
| 121. |
Which of following viruses do not cause a hemorrhagic fever? |
| A. | Crimean congo |
| B. | herpes |
| C. | Ebola |
| D. | dengue |
| Answer» C. Ebola | |
| 122. |
Size of 'Orthomyxoviruses' ranges from |
| A. | 20-110 nm |
| B. | 80-120 nm |
| C. | 40-560 nm |
| D. | 120-340 nm |
| Answer» C. 40-560 nm | |
| 123. |
Which of following describes viroids? |
| A. | circular RNA |
| B. | linear RNA |
| C. | circular DNA |
| D. | linear DNA |
| Answer» B. linear RNA | |
| 124. |
Which of the following viruses can be transmitted by the parenteral route? |
| A. | HBV |
| B. | HCV |
| C. | HDV |
| D. | All of these |
| Answer» E. | |
| 125. |
Virus size is determined by 'protein' coat named as |
| A. | Cell wall |
| B. | Capsid |
| C. | Capsomere |
| D. | Cell membrane |
| Answer» C. Capsomere | |
| 126. |
Transmission of hepatitis G virus is |
| A. | Parenterally |
| B. | Sexually |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 127. |
Which of following virus can only infect humans? |
| A. | measles |
| B. | influenza virus |
| C. | west Nile virus |
| D. | equine encephalitis |
| Answer» B. influenza virus | |
| 128. |
Prions are normal human proteins and they do no caused any |
| A. | Inflammatory response |
| B. | Scratches |
| C. | Harmful response |
| D. | Neutral |
| Answer» B. Scratches | |
| 129. |
The viruses in an attenuated vaccine |
| A. | have no genome |
| B. | continue to replicate |
| C. | are usually larger than bacteria |
| D. | is altered with chemicals |
| Answer» C. are usually larger than bacteria | |
| 130. |
How many triangular facets are there on surface of an adenovirus? |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» C. 30 | |
| 131. |
The diagnosis of hepatitis A virus infection is carried out from the method based on |
| A. | aminotransferase levels |
| B. | detection of faecal HAV by immunoelectron microscopy |
| C. | both (a) and (b) |
| D. | detection of IgM anti-HAV by ELISA |
| Answer» E. | |
| 132. |
In sheep, 'prions' are causative agent for |
| A. | Creutzfeldt-Jakob disease |
| B. | Scrapie |
| C. | Cancer |
| D. | Ulcer |
| Answer» C. Cancer | |
| 133. |
In order for a virus to replicate |
| A. | the capsid must enter the host cell cytoplasm |
| B. | the host cell must be undergoing mitosis |
| C. | the genome must be released in the cytoplasm |
| D. | the host cell must lack a cell membrane |
| Answer» D. the host cell must lack a cell membrane | |
| 134. |
Which of following terms describes a worldwide spread of infection? |
| A. | outbreak |
| B. | endemic |
| C. | pandemic |
| D. | epidemic |
| Answer» D. epidemic | |
| 135. |
Usually viruses are separated into several large groups based primarily on |
| A. | nature of the host |
| B. | nucleic acid characteristics |
| C. | capsid symmetry |
| D. | diameter of the viroin or nucleocapsid |
| Answer» B. nucleic acid characteristics | |
| 136. |
The function of a viral capsid is |
| A. | protection against the viral genome from physical and enzymatic destruction |
| B. | providing binding sites that enable the virus to attach to specific receptor sites on the host cell |
| C. | serving as a vehicle of transmission from one host to another |
| D. | all of the above |
| Answer» E. | |
| 137. |
Which of following needs to be coded by virus itself and usually lacks in host? |
| A. | RNA dependent RNA polymerase |
| B. | ribosomes |
| C. | nucleotides |
| D. | transcription proteins |
| Answer» B. ribosomes | |
| 138. |
Which of the following genera is included in the family Picorna-viridae? |
| A. | Enterovirus |
| B. | Rhinovirus |
| C. | Hepatovirus |
| D. | All of these |
| Answer» E. | |
| 139. |
Which of the following virus is always detectable after infections? |
| A. | Hepatitis B virus |
| B. | Herpes simplex virus |
| C. | Varicella-zoster virus |
| D. | Cytomegalovirus |
| Answer» B. Herpes simplex virus | |
| 140. |
Which of the following virus is susceptible to chloroform? |
| A. | Herpes |
| B. | Influenza |
| C. | Measles |
| D. | All of these |
| Answer» E. | |
| 141. |
How do viruses spread from one plant cell to next? |
| A. | vesicles |
| B. | plasmodesmata |
| C. | cell wall |
| D. | nucleus |
| Answer» C. cell wall | |
| 142. |
Attachment of viruses to receptors and protection of genetic material is mediated by the |
| A. | Cell wall |
| B. | Cell membrane |
| C. | Envelop |
| D. | Capsid |
| Answer» E. | |
| 143. |
Which of the following viruses belong to family Flaviviridae? |
| A. | Rubella virus |
| B. | Yellow fever virus |
| C. | Hepatitis C virus |
| D. | All of these |
| Answer» E. | |
| 144. |
What kind of embryo is often used for viral assays? |
| A. | Mouse |
| B. | Rat |
| C. | Cat |
| D. | Chicken |
| Answer» E. | |
| 145. |
'Measles; and 'mumps' virus belongs to a family, called |
| A. | Orthomyxoviruses |
| B. | Paramyxovirus |
| C. | Filovirus |
| D. | Arenavirus |
| Answer» C. Filovirus | |
| 146. |
Plant viruses may be cultivated in |
| A. | tissue culture |
| B. | cultures of separated cells |
| C. | whole plants |
| D. | all of these |
| Answer» E. | |
| 147. |
Hepatocellular carcinoma (Hepatoma) may be caused by |
| A. | Hepatitis A virus |
| B. | Hepatitis C virus |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» D. None of these | |
| 148. |
What size 'reoviruses' does have ? |
| A. | 75 nm |
| B. | 34 nm |
| C. | 22 nm |
| D. | 45 nm |
| Answer» B. 34 nm | |
| 149. |
The cell lines which can support the growth of polioviruses is/are |
| A. | Human amnion |
| B. | Monkey kidney |
| C. | HeLa |
| D. | All of these |
| Answer» E. | |
| 150. |
In family coronavirus, word 'corona' refers to |
| A. | Thread |
| B. | Whip |
| C. | Prominent halo of spikes |
| D. | Tail |
| Answer» D. Tail | |