MCQOPTIONS
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MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 | |
| 2. |
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 | |
| 3. |
Which family has received most interest in their development as a biological control agent against insects? |
| A. | <i>Reoviridae</i> |
| B. | <i>Baculoviridae</i> |
| C. | <i>Iridoviridae</i> |
| D. | <i>Poxviridae</i> |
| Answer» C. <i>Iridoviridae</i> | |
| 4. |
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 | |
| 5. |
Virulent and nonvirulent viruses may not |
| A. | inhibit host cell DNA synthesis |
| B. | inhibit host cell RNA synthesis |
| C. | stimulate host cell macromolecule synthesis |
| D. | degrade host cell DNA |
| Answer» E. | |
| 6. |
The hepadnaviruses such as hepatitis B virus are quite different from other DNA viruses with respect to genome replication. These replicate their DNA using |
| A. | DNA-dependent DNA polymerase |
| B. | reverse transcriptase |
| C. | Rnase H |
| D. | DNA ligase |
| Answer» C. Rnase H | |
| 7. |
Which of the following is the agent associated with the development of neurodegenerative disease in livestock and humans? |
| A. | Prions |
| B. | Viroids |
| C. | virions |
| D. | Virinos |
| Answer» B. Viroids | |
| 8. |
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 | |
| 9. |
__________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 | |
| 10. |
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 | |
| 11. |
Viral RNA is replicated in the host cell |
| A. | cytoplasmic matrix |
| B. | nucleus |
| C. | mitochondria |
| D. | lysozomes |
| Answer» B. nucleus | |
| 12. |
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. | |