MCQOPTIONS
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MCQOPTIONS
This section includes 128 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
The mode of transmission of hepatitis E is through |
| A. | infected syringes and needles |
| B. | faecally contaminated drinking water |
| C. | sexual intercourse |
| D. | none of these |
| Answer» C. sexual intercourse | |
| 102. |
Which of the following is transmembrane pedicle antigen of HIV-I? |
| A. | gp 41 |
| B. | gp 140 |
| C. | gp l20 |
| D. | gp 36 |
| Answer» B. gp 140 | |
| 103. |
Which of the following viral agents can cause diarrhea? |
| A. | Rotaviruses |
| B. | Norwalk virus |
| C. | Astroviruses |
| D. | All of these |
| Answer» E. | |
| 104. |
HIV belongs to the family retroviridae and sub-family |
| A. | Oncovirinae |
| B. | Lentivirinae |
| C. | Spumavirinae |
| D. | None of these |
| Answer» C. Spumavirinae | |
| 105. |
A yellow color in the creamy layer of milk may be caused by |
| A. | Pseudomonas synxantha |
| B. | Pseudomonas syncyanea |
| C. | both (a) and (b) |
| D. | S. marcescens |
| Answer» B. Pseudomonas syncyanea | |
| 106. |
Molds causing spoilage of eggs include species of |
| A. | Cladosporium |
| B. | Mucor |
| C. | Thamnidium |
| D. | all of these |
| Answer» E. | |
| 107. |
Concentrate of fruits and vegetable juices |
| A. | favor the growth of A. niger and A. flavus species |
| B. | favour the growth of yeast and of acid and sugar tolerant Leuconostoc and Lactobacillus species |
| C. | favor the growth of Saprophytic bacteria |
| D. | none of the above |
| Answer» C. favor the growth of Saprophytic bacteria | |
| 108. |
Black rots in eggs is most commonly caused by |
| A. | species of Proteus |
| B. | species of Micrococcus or Bacillus |
| C. | molds or yeasts |
| D. | all of these |
| Answer» B. species of Micrococcus or Bacillus | |
| 109. |
HIV can infect |
| A. | Microglial cells |
| B. | M (membranous) cells |
| C. | CD4 + T lymphocytes |
| D. | All of these |
| Answer» E. | |
| 110. |
The commonest bacterial infection in HIV disease is/are |
| A. | mycobacterial infection |
| B. | salmonella infection |
| C. | bartonella infection |
| D. | all of these |
| Answer» B. salmonella infection | |
| 111. |
The screening test/s for diagnosis of HIV infection is/are |
| A. | ELISA |
| B. | Latex agglutination |
| C. | Dot blot assay |
| D. | all of these |
| Answer» E. | |
| 112. |
Parasitic infection/s frequently observed in HIV disease is / are. |
| A. | cryptosporidiosis |
| B. | toxoplasmosis |
| C. | isosporiasis |
| D. | all of these |
| Answer» E. | |
| 113. |
The confirmatory test(s) for HIV infection is/are |
| A. | virus isolation |
| B. | detection of p24 antigen |
| C. | detection of viral nucleic acid |
| D. | all of the above |
| Answer» E. | |
| 114. |
The micro-organism which is present in both fresh and frozen juices is |
| A. | E. coli |
| B. | Entereobacter aerogenes |
| C. | P. chrysogenum |
| D. | None of these |
| Answer» C. P. chrysogenum | |
| 115. |
Certain strains of Streptococcus lactis var. maltigenes may produce |
| A. | bitter flavor |
| B. | acid flavor |
| C. | burnt or caramel flavor |
| D. | none of these |
| Answer» D. none of these | |
| 116. |
Fishiness in butter is caused by |
| A. | Aeromonas hydrophila |
| B. | Pseudomonas synxantha |
| C. | Pseudomonas syncyanea |
| D. | none of these |
| Answer» B. Pseudomonas synxantha | |
| 117. |
Which type of interferon is produced by T lymphocytes? |
| A. | α |
| B. | β |
| C. | γ |
| D. | γ and β |
| Answer» D. γ and β | |
| 118. |
Negri bodies are found in cells infected with |
| A. | Paramyxoviruses |
| B. | Vaccinia virus |
| C. | Fowlpox virus |
| D. | Rabies virus |
| Answer» E. | |
| 119. |
The chief type of spoilage in sweetened condensed milk may be |
| A. | gas formation by sucrose fermenting yeasts |
| B. | thickening caused by micrococci |
| C. | mold colonies growing on the surface |
| D. | all of the above |
| Answer» E. | |
| 120. |
Supercoiling refers to the extra turns in the structure of ds DNA due to the action of |
| A. | DNA gyrase |
| B. | DNA pyrase |
| C. | RNA gyrase |
| D. | RNA pyrase |
| Answer» B. DNA pyrase | |
| 121. |
What is the shape of rabies virus? |
| A. | Spherical |
| B. | Polygonal |
| C. | Bullet-shaped |
| D. | Tubular |
| Answer» D. Tubular | |
| 122. |
Vacuum packaged meats are spoiled by |
| A. | B. thermosphacta |
| B. | Lactobacilli |
| C. | Both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 123. |
A brown color in milk may result from |
| A. | Pseudomonas putrefaciens |
| B. | the enzymatic oxidation of tyrosine by P. fluorescens |
| C. | both (a) and (b) |
| D. | S. marcescens |
| Answer» D. S. marcescens | |
| 124. |
Icosahedral viruses are generally |
| A. | polio viruses |
| B. | adeno viruses |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» D. none of these | |
| 125. |
Animal viruses with capsids displaying helical symmetry include |
| A. | measles and mumps |
| B. | influenza |
| C. | rabies |
| D. | all of these |
| Answer» E. | |
| 126. |
Negative strand ssRNA viruses need to have a preformed replicase when they invade a mammalian cell because they |
| A. | use it to terminate transcripts when they copy host cell mRNA |
| B. | have to make a positive strand copy that can be translated |
| C. | use it to modify host enzymes that are recruited for viral replication |
| D. | none of the above |
| Answer» C. use it to modify host enzymes that are recruited for viral replication | |
| 127. |
What can be coated to the plastic dish if an ELISA is performed to directly detect polio virus? |
| A. | Patient serum |
| B. | Anti-polio antibody |
| C. | Polio capsid protein |
| D. | Colored substrate |
| Answer» C. Polio capsid protein | |
| 128. |
Which of the following reflects the correct order of events that take place during the multiplication of a virus? |
| A. | Attachment, penetration, maturation, biosynthesis, release |
| B. | Penetration, attachment, biosynthesis, maturation, release |
| C. | Attachment, penetration, biosynthesis, maturation, release |
| D. | Attachment, release, biosynthesis, maturation, penetration |
| Answer» D. Attachment, release, biosynthesis, maturation, penetration | |