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.
| 151. |
The sequence of nucleic acid in a variety of viruses and viral host, will find more similarities |
| A. | among different viruses than between viruses and their hosts |
| B. | among different viral hosts than among different viruses |
| C. | among different viral hosts than between viruses and their hosts |
| D. | between viruses and their hosts than among different viruses |
| Answer» E. | |
| 152. |
Lesions on chorioallantoic membrane are produced by |
| A. | Herpes B virus |
| B. | Vaccinia virus |
| C. | Herpes simplex virus |
| D. | all of these |
| Answer» E. | |
| 153. |
A phage that can only replicate through a lytic cycle is termed as |
| A. | virulent phage |
| B. | infectious phase |
| C. | lytic phase |
| D. | lysogenic phage |
| Answer» B. infectious phase | |
| 154. |
Viroids are composed of |
| A. | single-stranded DNA |
| B. | double-stranded DNA |
| C. | single-stranded RNA |
| D. | double-stranded RNA |
| Answer» D. double-stranded RNA | |
| 155. |
Which of the following antigenic types of hepatitis B virus is prevalent in India? |
| A. | Adw |
| B. | Adr |
| C. | Ayw |
| D. | Ayr |
| Answer» D. Ayr | |
| 156. |
The most complex type of bacterial viruses having hexagonal head, a rigid tail with a contractile sheath and tall fibers is morphologically classified as |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» B. B | |
| 157. |
The envelope of which of the following viruses is derived from the host cell nucleus? |
| A. | Paramyxoviruses |
| B. | Retroviruses |
| C. | Orthomyxoviruses |
| D. | Herpesviruses |
| Answer» E. | |
| 158. |
How big is Mimivirus? |
| A. | 10nm |
| B. | 100nm |
| C. | 400nm |
| D. | 20nm |
| Answer» D. 20nm | |
| 159. |
Which of following function is performed by normal BRCA 1 and BRCA 2? |
| A. | cyclin dependent kinase |
| B. | chromatin remodeling |
| C. | translation regulation |
| D. | DNA damage repair pathway |
| Answer» E. | |
| 160. |
How many T4 phage particles are released when host cell finally bursts? |
| A. | up to 5 |
| B. | up to 200 |
| C. | up to 300 |
| D. | up to 1000 |
| Answer» C. up to 300 | |
| 161. |
Presence of solely single molecule of circular 'DNA' is speciality of the |
| A. | Prion |
| B. | Viroid |
| C. | Bacteriophages |
| D. | Virion |
| Answer» C. Bacteriophages | |
| 162. |
Which one is not useful in the treatment of viruses except |
| A. | acyclovir |
| B. | interferon |
| C. | penicillin |
| D. | antibodies |
| Answer» D. antibodies | |
| 163. |
The time from infection until lysis is called as |
| A. | eclipse period |
| B. | rise period |
| C. | latent period |
| D. | burst size |
| Answer» D. burst size | |
| 164. |
Which of the following may affect proteins and nucleic acids, but not viruses? |
| A. | Denaturation |
| B. | Enzyme treatment |
| C. | Pressure |
| D. | All of these |
| Answer» E. | |
| 165. |
What is approximate size of togaviruses ? |
| A. | 60 nm |
| B. | 55 nm |
| C. | 45 nm |
| D. | 54 nm |
| Answer» B. 55 nm | |
| 166. |
Infectious particles that composed solely of proteins is known as |
| A. | Virion |
| B. | Prions |
| C. | Phage |
| D. | Bacteriophages |
| Answer» C. Phage | |
| 167. |
What does 'N' in HINI virus signify? |
| A. | Nile |
| B. | neurons |
| C. | nitrogen |
| D. | neuraminidase |
| Answer» E. | |
| 168. |
Which of the following genera can cause disease in humans? |
| A. | Orthopoxvirus |
| B. | Parapoxvirus |
| C. | Molluscipoxvirus |
| D. | All of these |
| Answer» E. | |
| 169. |
What is estimated annual loss due to destruction of horticulture from plant viral infections? |
| A. | 15 billion dollars |
| B. | 1 billion dollars |
| C. | 5 million dollars |
| D. | 10 million dollars |
| Answer» B. 1 billion dollars | |
| 170. |
Which of the following inclusion bodies are present in the cytoplasm of the Purkinje cells of the cerebellum in case of rabies infection? |
| A. | Paschen bodies |
| B. | Guarnieri bodies |
| C. | Negri bodies |
| D. | Elementary bodies |
| Answer» D. Elementary bodies | |
| 171. |
Parvovirus has which of following genomes? |
| A. | dsDNA |
| B. | ssDNA |
| C. | dsRNA |
| D. | ssRNA |
| Answer» C. dsRNA | |
| 172. |
Enveloped viruses have a __________ shape. |
| A. | icosahedral |
| B. | helical |
| C. | roughly spherical |
| D. | complex |
| Answer» D. complex | |
| 173. |
Which of the following viruses show/s transformation of infected cells? |
| A. | Hepatitis B virus |
| B. | Human T cell lymphotronic virus type I |
| C. | Epstein-Barr virus |
| D. | All of these |
| Answer» E. | |
| 174. |
How big are tiniest viruses? |
| A. | 20nm |
| B. | 300nm |
| C. | 2nm |
| D. | 80nm |
| Answer» B. 300nm | |
| 175. |
The __________ of the influenza-enveloped virus appear to be involved in attachment to the host cell receptor site. |
| A. | fimbriae |
| B. | flagellae |
| C. | hemagluttinin |
| D. | neuraminidase |
| Answer» D. neuraminidase | |
| 176. |
Retroviruses belong to which of following class of viruses? |
| A. | V |
| B. | VI |
| C. | IV |
| D. | III |
| Answer» C. IV | |
| 177. |
Bollinger bodies are found in the cytoplasm of cells infected by which of the following viruses? |
| A. | variola virus |
| B. | fowl pox virus |
| C. | rabies virus |
| D. | herpes virus |
| Answer» C. rabies virus | |
| 178. |
In cell culture, measles virus may lead to |
| A. | nuclear pyknosis |
| B. | transformation of cells |
| C. | syncytium formation |
| D. | rounding and aggregation of cells |
| Answer» D. rounding and aggregation of cells | |
| 179. |
Anaplasia is structural abnormality of cells. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 180. |
Which among the following is the family of RNA containing viruses that can cause cancer in animals? |
| A. | Herpesviridae |
| B. | Adenoviridae |
| C. | Papovaviridae |
| D. | Retroviridae |
| Answer» E. | |
| 181. |
The Epstein-Barr virus (EBV) can induce tumors in _____________ |
| A. | mouse |
| B. | monkey |
| C. | humans |
| D. | rodents |
| Answer» D. rodents | |
| 182. |
Which of following cells are infected by HIV? |
| A. | b cells |
| B. | helper t cells |
| C. | macrophages |
| D. | neutrophils |
| Answer» C. macrophages | |
| 183. |
Protein coat capsid of viruses, made up of repeated subunits, named as |
| A. | Proteins |
| B. | Amino acids |
| C. | Capsomere |
| D. | Nucleotides |
| Answer» D. Nucleotides | |
| 184. |
Which of the following oncogenic viruses was first detected? |
| A. | Rous sarcoma virus. |
| B. | Epstein-Barr virus |
| C. | Herpes simplex virus type 2 |
| D. | Human T cell leukaemia virus |
| Answer» B. Epstein-Barr virus | |
| 185. |
Nucleic acid of viruses, included |
| A. | DNA |
| B. | RNA |
| C. | DNA or RNA |
| D. | None of these |
| Answer» D. None of these | |
| 186. |
The extracellular phage number increases until a constant titer at the end of the multiplication cycle. This time interval is termed as |
| A. | eclipse period |
| B. | rise period |
| C. | latent period |
| D. | burst size |
| Answer» C. latent period | |
| 187. |
A vaccine is available for all following infections except |
| A. | rubella |
| B. | hiv virus |
| C. | mumps |
| D. | hepatitis b |
| Answer» C. mumps | |
| 188. |
Phages that can coexist with bacteria and have both modes of replication inside a bacterium are called |
| A. | virulent phages |
| B. | t4 phages |
| C. | temperate phages |
| D. | lytic phages |
| Answer» D. lytic phages | |
| 189. |
Diameter of 'arenavirus' ranges from 80 nm to |
| A. | 120 nm |
| B. | 130 nm |
| C. | 150 nm |
| D. | 160 nm |
| Answer» B. 130 nm | |
| 190. |
Edward Jenner began inoculating humans with material from __________ lesions. |
| A. | Smallpox |
| B. | Avianpox |
| C. | Cowpox |
| D. | Chickenpox |
| Answer» D. Chickenpox | |
| 191. |
Human 'immuno' deficiency virus belongs to a family, called |
| A. | Orthomyxoviruses |
| B. | Retrovirus |
| C. | Reovirus |
| D. | Arenavirus |
| Answer» C. Reovirus | |
| 192. |
'Poxviruses' have |
| A. | Fried egg like shape |
| B. | Brick like shape |
| C. | Grapes like shape |
| D. | Beads shaped |
| Answer» C. Grapes like shape | |
| 193. |
The viruses, which is/are transmitted by parenteral and sexual routes is/are |
| A. | Hepatitis B virus |
| B. | Hepatitis C virus |
| C. | Hepatitis G virus |
| D. | All of these |
| Answer» E. | |
| 194. |
Scrapie is a chronic disease of which of the following animals? |
| A. | sheep |
| B. | mouse |
| C. | mink |
| D. | cow |
| Answer» B. mouse | |
| 195. |
In which of the following categories of cancer solid tumors grow from derivatives of embryonal mesoderm? |
| A. | Leukemias |
| B. | Lymphomas |
| C. | Sarcomas |
| D. | Carcinomas |
| Answer» D. Carcinomas | |
| 196. |
In virion structure, regulatory protein is present which is known as |
| A. | Tegument |
| B. | Cell membrane |
| C. | Antigen |
| D. | Coat |
| Answer» B. Cell membrane | |
| 197. |
In Rhabdoviruses, term 'rhabdo' refers to as |
| A. | Bread shaped |
| B. | Bullet shaped |
| C. | Brick shaped |
| D. | Beads shaped |
| Answer» C. Brick shaped | |
| 198. |
The disease(s) caused by genus Orthopoxvirus is/are |
| A. | Vaccinia |
| B. | Smallpox |
| C. | Cowpox |
| D. | All of these |
| Answer» E. | |
| 199. |
__________is probably the most important characteristic for classification of viruses in eukaryotes. |
| A. | Host preference |
| B. | Morphology |
| C. | Physical nature of virion constituents |
| D. | Chemical nature of virion constituents |
| Answer» B. Morphology | |
| 200. |
Gradient of which of following proteins determines anterior-posterior axis in drosophila? |
| A. | Bicoid |
| B. | morphogens |
| C. | g protein |
| D. | axis protein |
| Answer» B. morphogens | |