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.
| 251. |
Protein shell that encapsulates viral genome is called |
| A. | coat |
| B. | viral cover |
| C. | cell membrane |
| D. | capsid |
| Answer» E. | |
| 252. |
The phage components begin to assemble into mature phages only after the synthesis of |
| A. | structural protein |
| B. | nucleic acid |
| C. | Both (a) and (b) |
| D. | amino acids |
| Answer» D. amino acids | |
| 253. |
Which of the following viruses are relatively thermostable? |
| A. | Human immunodeficiency virus |
| B. | Rubella virus |
| C. | Hepatits A virus |
| D. | Influenza virus |
| Answer» D. Influenza virus | |
| 254. |
Hollow coil like arrangement of 'capsomeres' that looks like a rod shaped is known as |
| A. | Helical |
| B. | Icosahedral |
| C. | Spiral |
| D. | Triangular |
| Answer» B. Icosahedral | |
| 255. |
Which of the following is continuous cell line? |
| A. | HeLa |
| B. | HEp-2 |
| C. | KB |
| D. | All of these |
| Answer» E. | |
| 256. |
'Viroid' lacks |
| A. | DNA |
| B. | RNA |
| C. | Envelop |
| D. | Cell membrane |
| Answer» D. Cell membrane | |
| 257. |
'capsid' proteins and nucleic acid 'genome' combines to form |
| A. | Capsid |
| B. | Capsomere |
| C. | Nucleocapsid |
| D. | Nucleic acid |
| Answer» D. Nucleic acid | |
| 258. |
Which of the following bacteriophage is said to have banal symmetry? |
| A. | T2 |
| B. | T4 |
| C. | T6 |
| D. | all of these |
| Answer» E. | |
| 259. |
Which of the following is not true of virions? |
| A. | Reproduce independently |
| B. | Contain DNA |
| C. | Contain RNA |
| D. | Are extracellular |
| Answer» B. Contain DNA | |
| 260. |
Viruses largely lack metabolic machinery of their own to generate energy or to synthesize |
| A. | protein |
| B. | carbohydrate |
| C. | alcohol |
| D. | all of these |
| Answer» B. carbohydrate | |
| 261. |
The most efficient way to enclose a space is within a/an |
| A. | sphere |
| B. | cube |
| C. | icosahedron |
| D. | helix |
| Answer» D. helix | |
| 262. |
Individual protein subunits of a capsid are called |
| A. | spikes |
| B. | glycoproteins |
| C. | capsomeres |
| D. | capsid units |
| Answer» D. capsid units | |
| 263. |
The yield of phage per bacterium is called the |
| A. | eclipse size |
| B. | latent size |
| C. | burst size |
| D. | none of these |
| Answer» D. none of these | |
| 264. |
Which of following features most plant viruses have? |
| A. | circular genome |
| B. | ssDNA genome |
| C. | DNA genome |
| D. | rRNA genome |
| Answer» E. | |
| 265. |
What does 'H' in HINI virus signify? |
| A. | Hyalomma |
| B. | hen |
| C. | hanta |
| D. | hemagglutinin |
| Answer» E. | |
| 266. |
A single 'glycoprotein' that is present in prion, having an approximate molecular weight ranges from |
| A. | 27000-30000 |
| B. | 2500-3000 |
| C. | 3000-3500 |
| D. | 4000-4500 |
| Answer» B. 2500-3000 | |
| 267. |
Creutzfeldt-Jakob disease, a human disease caused by |
| A. | Virus |
| B. | Viroid |
| C. | Prion |
| D. | Phage |
| Answer» D. Phage | |
| 268. |
Which family has received most interest in their development as a biological control agent against insects? |
| A. | Reoviridae |
| B. | Baculoviridae |
| C. | Iridoviridae |
| D. | Poxviridae |
| Answer» C. Iridoviridae | |
| 269. |
Which of the following is the correct sequence of events in replication by bacterial phage? |
| A. | adsorption,pinning,DNA injection,sheath contraction |
| B. | adsorption,pinning,sheath contraction,DNA injection |
| C. | adsorption,absorption,sheath contraction,pinning |
| D. | absorption,adsorption,DNA injection |
| Answer» C. adsorption,absorption,sheath contraction,pinning | |
| 270. |
Which of the following enzymes transcribe late genes? |
| A. | ligases |
| B. | nucleases |
| C. | RNA polymerase |
| D. | restriction enzymes |
| Answer» D. restriction enzymes | |
| 271. |
Envelop of virus, a lipoprotein membrane, composed of derivatives of lipid, from host cell membrane and protein, known to be a |
| A. | Virus-specific |
| B. | Host specific |
| C. | Neutral |
| D. | Capsid |
| Answer» B. Host specific | |
| 272. |
The temperate phage that have no site specificity for insertion and may even be able to insert multiple copies of their DNA into a single bacterial chromosome is |
| A. | λ phage enzyme |
| B. | λ DNA |
| C. | Phage Mu |
| D. | Phage Mn |
| Answer» D. Phage Mn | |
| 273. |
Which of the coxsackieviruses can cause herpangina? |
| A. | Group A |
| B. | Group B |
| C. | Both (a) and (b) |
| D. | None of these |
| Answer» B. Group B | |
| 274. |
The viral DNA is removed from the host's chromosomes and the lytic cycle occurs. The process is called |
| A. | spontaneous induction |
| B. | inductive infection |
| C. | resultant induction |
| D. | spontaneous infection |
| Answer» B. inductive infection | |
| 275. |
Intracytoplasmic inclusions are found in chicken pox, herpes, and the polyhedra diseases of insects. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 276. |
The delayed early genes codes for which of the following enzymes? |
| A. | phage enzymes |
| B. | RNA polymerase |
| C. | nucleases |
| D. | oxidases |
| Answer» B. RNA polymerase | |
| 277. |
Human pathogen, of a family 'togaviruses' is |
| A. | Rotavirus |
| B. | Rubella virus |
| C. | Poliovirus |
| D. | Papilloma virus |
| Answer» C. Poliovirus | |
| 278. |
Inclusion bodies of measles virus are |
| A. | intracytoplasmic |
| B. | intranuclear |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 279. |
All of the following viruses are enveloped except |
| A. | Hepatitis A virus |
| B. | Hepatitis B virus |
| C. | Hepatitis C virus |
| D. | Hepatitis D virus |
| Answer» B. Hepatitis B virus | |
| 280. |
Which of the following are said to have binal symmetry? |
| A. | M13 |
| B. | T4 |
| C. | T7 |
| D. | MV-L2 |
| Answer» C. T7 | |
| 281. |
Which of following allows phages to coexist with bacteria and allow their replication without host disruption? |
| A. | virulent cycle |
| B. | lytic cycle |
| C. | infectious cycle |
| D. | lysogenic cycle |
| Answer» E. | |
| 282. |
Which of following is an example of a double-stranded DNA virus? |
| A. | herpes |
| B. | hiv |
| C. | rhinovirus |
| D. | flavivirus |
| Answer» B. hiv | |
| 283. |
The first step in infection of a host bacterial cells by a phage is |
| A. | adsorption |
| B. | absorption |
| C. | penetration |
| D. | replication |
| Answer» B. absorption | |
| 284. |
The envelope of an enveloped virus is derived from |
| A. | the mitochondrion of the cell |
| B. | the cell membrane |
| C. | the endoplasmic reticulum of the cell |
| D. | none of these |
| Answer» C. the endoplasmic reticulum of the cell | |
| 285. |
A vaccine cannot be derived from which of following? |
| A. | dead pathogen |
| B. | attenuated pathogen |
| C. | surface proteins on the pathogen |
| D. | live pathogen |
| Answer» E. | |
| 286. |
Animal and plant viruses contain both DNA and RNA in the same virion. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 287. |
Adenoviruses exhibit which of the following symmetry? |
| A. | helical symmetry |
| B. | circular symmetry |
| C. | icosahedral symmetry |
| D. | complex structure symmetry |
| Answer» D. complex structure symmetry | |
| 288. |
The fringes on animal viruses like influenza virus is made up of ______________ |
| A. | lipoproteins |
| B. | glycoproteins |
| C. | cellulose |
| D. | polysaccharides |
| Answer» C. cellulose | |
| 289. |
The envelope surrounding the nucleocapsid of some animal viruses is made up of which of the following structures? |
| A. | lipoproteins |
| B. | lipopolysaccharides |
| C. | peptidoglycan |
| D. | chitin |
| Answer» B. lipopolysaccharides | |
| 290. |
Rubella vaccines contain viruses are isolated only in African green monkey cells. |
| A. | True |
| B. | False |
| C. | May be |
| D. | Can't say |
| Answer» C. May be | |
| 291. |
Which of the following symmetry is exhibited by rod-shaped viruses? |
| A. | icosahedral |
| B. | helical |
| C. | complex |
| D. | circular |
| Answer» C. complex | |
| 292. |
For which viral disease, vaccine has been recently developed through the use of tissue culture? |
| A. | Measles |
| B. | Mumps |
| C. | Rabies |
| D. | S mallpox |
| Answer» B. Mumps | |
| 293. |
Yellow fever virus can be attenuated by serial passage on cultures of ________________________ |
| A. | embryonated eggs |
| B. | tissue |
| C. | chick embryo tissue |
| D. | pig embryo tissue |
| Answer» D. pig embryo tissue | |
| 294. |
Effective poliomyelitis vaccines were developed by culturing the virus of poliomyelitis on the kidney cells of which animal? |
| A. | cow |
| B. | monkey |
| C. | giraffe |
| D. | pig |
| Answer» C. giraffe | |
| 295. |
Word 'filo' used in name of a family filoviruses, resembles with |
| A. | Thread |
| B. | Whip |
| C. | Round |
| D. | Wrinkle |
| Answer» B. Whip | |
| 296. |
Symmetry of 'arenavirus' is |
| A. | Spiral |
| B. | Icosahedral |
| C. | Helical |
| D. | Round |
| Answer» D. Round | |
| 297. |
Diameter of 'herpesviruses' is |
| A. | 75 nm |
| B. | 100 nm |
| C. | 55 nm |
| D. | 23 nm |
| Answer» C. 55 nm | |
| 298. |
What is estimated diameter of Caliciviruses ? |
| A. | 38 nm |
| B. | 75 nm |
| C. | 22 nm |
| D. | 45 nm |
| Answer» B. 75 nm | |
| 299. |
Outer viral 'proteins' also act as |
| A. | Antibody |
| B. | Receptor |
| C. | Antigen |
| D. | Coat |
| Answer» D. Coat | |
| 300. |
Translation of mRNA into proteins takes place in the ________________ |
| A. | host cell nucleus |
| B. | host cell cytoplasm |
| C. | viral nucleus |
| D. | viral cytoplasm |
| Answer» C. viral nucleus | |