MCQOPTIONS
Saved Bookmarks
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.
| 201. |
How many different types of hemagglutinin proteins are there in viruses? |
| A. | 12 |
| B. | 16 |
| C. | 56 |
| D. | 10 |
| Answer» C. 56 | |
| 202. |
How many genes phage T4 has? |
| A. | 100 |
| B. | 200 |
| C. | 300 |
| D. | 400 |
| Answer» D. 400 | |
| 203. |
Intracellular structures formed during many viral infections, called __________ , which can directly disrupt cell structure. |
| A. | prokaryotes |
| B. | chromosomal disruptions |
| C. | inclusion bodies |
| D. | cytocidal bodies |
| Answer» D. cytocidal bodies | |
| 204. |
How many genes are present in pandora virus? |
| A. | 2000 |
| B. | 200 |
| C. | 10 |
| D. | 100000 |
| Answer» B. 200 | |
| 205. |
In the growth curve of plaque-forming units, the time from infection until lysis is known as ____________________ |
| A. | eclipse period |
| B. | rise period |
| C. | burst period |
| D. | latent period |
| Answer» E. | |
| 206. |
What does a viral DNA becomes after being associated with the bacterial chromosome? |
| A. | gene |
| B. | prophage |
| C. | plasmid |
| D. | plaque |
| Answer» C. plasmid | |
| 207. |
What is the colour of the plaque formed? |
| A. | yellow |
| B. | opaque |
| C. | clear |
| D. | blue |
| Answer» D. blue | |
| 208. |
The protein coat of the virus remains outside the host cell. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 209. |
In which of the following method, the viral particles are transmitted through lysis of cell? |
| A. | Lytic cycle |
| B. | Lysogeny |
| C. | Replication |
| D. | Translation |
| Answer» B. Lysogeny | |
| 210. |
Which of the following is the first step in replication by bacterial phages? |
| A. | adsorption |
| B. | penetration |
| C. | transcription |
| D. | assembly and release |
| Answer» B. penetration | |
| 211. |
In which of the following phage prophage exists as a circular form? |
| A. | Phage lambda type |
| B. | Phage P1 type |
| C. | Phage T2 type |
| D. | Phage T1 type |
| Answer» C. Phage T2 type | |
| 212. |
From which of the following animal was the material isolated which was used for the vaccination for the first time? |
| A. | cat |
| B. | cow |
| C. | pig |
| D. | goat |
| Answer» C. pig | |
| 213. |
Which of the following gene codes for an enzyme which directs the insertion of the phage DNA into the bacterial chromosome? |
| A. | recA gene |
| B. | cro gene |
| C. | int gene |
| D. | gal gene |
| Answer» D. gal gene | |
| 214. |
Which of the following is the characteristic of repressor protein? |
| A. | basic protein |
| B. | acidic protein |
| C. | basic protein,molecular weight of 26000 |
| D. | acidic protein,molecular weight of 26000 |
| Answer» E. | |
| 215. |
Which of the following phage do not cause lysogeny? |
| A. | T2 |
| B. | T1 |
| C. | lambda |
| D. | P1 |
| Answer» B. T1 | |
| 216. |
epressor protein makes the cell resistant to lysis. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» B. False | |
| 217. |
Which of the following coliphage has tadpole shape? |
| A. | T1 |
| B. | T4 |
| C. | T5 |
| D. | T7 |
| Answer» E. | |
| 218. |
Which of the following is a family of lambda phage viruses? |
| A. | Pedoviridae |
| B. | Microviridae |
| C. | Styloviridae |
| D. | Corticoviridae |
| Answer» D. Corticoviridae | |
| 219. |
Which of the following are filamentous phage of E.coli? |
| A. | f1 |
| B. | T3 |
| C. | f1 and fd |
| D. | T3 and T7 |
| Answer» D. T3 and T7 | |
| 220. |
How many total viral diseases of plants are known? |
| A. | 1000 |
| B. | 2000 |
| C. | 3000 |
| D. | 4000 |
| Answer» C. 3000 | |
| 221. |
Which of following viruses have an icosahedral capsid with glycoprotein spikes at each corner? |
| A. | adenovirus |
| B. | influenza virus |
| C. | t4 |
| D. | tobacco mosaic virus |
| Answer» B. influenza virus | |
| 222. |
Which of the following viruses carry minus-strand RNA? |
| A. | rhabdoviruses |
| B. | picornaviruses |
| C. | retroviruses |
| D. | tobacco mosaic viruses |
| Answer» B. picornaviruses | |
| 223. |
A single copy of 'genome' in all viruses, put it into a cell, known as |
| A. | Diploid |
| B. | Haploid |
| C. | Polyploid |
| D. | Euploid |
| Answer» C. Polyploid | |
| 224. |
'Filoviruses' have |
| A. | Constant shape |
| B. | Discrete shape |
| C. | Pleomorphic |
| D. | Polymorphic |
| Answer» D. Polymorphic | |
| 225. |
The capsomeres consist of a number of proteins subunits or molecules called |
| A. | protomers |
| B. | caproprotein |
| C. | procapsid |
| D. | none of these |
| Answer» B. caproprotein | |
| 226. |
During the first 10 minutes after injection of phage DNA, no phage can be recovered by disrupting the infected bacterium. This is termed as |
| A. | eclipse period |
| B. | rise period |
| C. | latent period |
| D. | burst size |
| Answer» B. rise period | |
| 227. |
'DNA' present in viruses, having |
| A. | A single molecule |
| B. | Double molecule |
| C. | Several molecules |
| D. | Clusters |
| Answer» B. Double molecule | |
| 228. |
The bacterial viruses having head made up of large capsomeres, but no tail is morphologically classified as |
| A. | A |
| B. | B |
| C. | C |
| D. | D |
| Answer» E. | |
| 229. |
Which of following is not an example of a flavivirus? |
| A. | west Nile virus |
| B. | yellow fever virus |
| C. | rhino virus |
| D. | hepatitis C |
| Answer» D. hepatitis C | |
| 230. |
Virus reproduces in living cells by |
| A. | replication |
| B. | duplication |
| C. | multiplication |
| D. | all of these |
| Answer» B. duplication | |
| 231. |
Rhinovirus causes which of following diseases? |
| A. | diarrhea |
| B. | chicken pox |
| C. | common cold |
| D. | hemorrhage |
| Answer» D. hemorrhage | |
| 232. |
The protein integrase is encoded by which of the following gene? |
| A. | gal gene |
| B. | lambda gene |
| C. | bio gene |
| D. | cro gene |
| Answer» C. bio gene | |
| 233. |
Which of the following virus is enveloped? |
| A. | Adeno |
| B. | Herpes |
| C. | Polio |
| D. | None of these |
| Answer» C. Polio | |
| 234. |
Which of the following viruses belong to family Hepadnaviridae? |
| A. | Hepatitis A virus |
| B. | Hepatitis B virus |
| C. | Hepatitis D virus |
| D. | All of these |
| Answer» C. Hepatitis D virus | |
| 235. |
Which of the following viral infections can result in chronic carrier state? |
| A. | HBV |
| B. | HCV |
| C. | HDV |
| D. | All of these |
| Answer» E. | |
| 236. |
Vaccination was invented by ____________ |
| A. | Jenner |
| B. | Pasteur |
| C. | Watson |
| D. | Crick |
| Answer» B. Pasteur | |
| 237. |
Viruses require __________ for growth. |
| A. | bacteria |
| B. | plants |
| C. | animals |
| D. | living cells |
| Answer» E. | |
| 238. |
The lysogenic state is governed by the activity of the regulatory region of the lambda phage genomes; this region is termed as |
| A. | immunity repressor |
| B. | immunity operon |
| C. | operon repressor |
| D. | none of these |
| Answer» C. operon repressor | |
| 239. |
The size of viruses is usually measured in |
| A. | centimeters |
| B. | micrometers |
| C. | nanometers |
| D. | millimeters |
| Answer» D. millimeters | |
| 240. |
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 | |
| 241. |
Which of following is a bacteriophage? |
| A. | influenza virus |
| B. | t4 |
| C. | tobacco mosaic virus |
| D. | adenovirus |
| Answer» C. tobacco mosaic virus | |
| 242. |
Which of following viruses causes a mild rash? |
| A. | rhinovirus |
| B. | B 19 parvovirus |
| C. | yellow fever virus |
| D. | hepatitis C |
| Answer» C. yellow fever virus | |
| 243. |
Which of the following statements is not true of viruses? |
| A. | Viruses have been successfully grown in pure cultures in test tubes |
| B. | All viruses are obligatory intracellular parasites |
| C. | All viruses have either DNA or RNA as their genetic material |
| D. | Viruses probably arose from small fragments of cellular chromosomes |
| Answer» B. All viruses are obligatory intracellular parasites | |
| 244. |
When a virus enters a cell but does not replicate immediately, the situation is called |
| A. | lysogeny |
| B. | fermentation |
| C. | symbiosis |
| D. | synergism |
| Answer» B. fermentation | |
| 245. |
The most popular indirect method of counting virus particles is by |
| A. | hemagglutination assay |
| B. | plaque-assay |
| C. | counting plaque-forming units |
| D. | colony counting |
| Answer» B. plaque-assay | |
| 246. |
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 | |
| 247. |
cro gene is an example of immunity repressor. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 248. |
Which of the following has been linked to Kaposi's sarcoma? |
| A. | Epstein-Barr virus |
| B. | Human T-cell lymphotropic virus |
| C. | Human papilloma virus |
| D. | Human herpes virus 8 |
| Answer» E. | |
| 249. |
In cancer, the reversion of cells to a more primitive or less differentiated state is called |
| A. | neoplasia |
| B. | anaplasia |
| C. | metastasis |
| D. | oncogenic |
| Answer» C. metastasis | |
| 250. |
Vertical transmission may be seen in |
| A. | Hepatitis B virus |
| B. | Hepatitis C virus |
| C. | Hepatitis D virus |
| D. | All of these |
| Answer» E. | |