MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Microbiology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
T-even phage binding to probably involves |
| A. | electrostatic interaction |
| B. | hydrophobic interaction |
| C. | covalent bonds |
| D. | all of these |
| Answer» B. hydrophobic interaction | |
| 2. |
The filamentous bacteriopohage infect male cells by attaching to |
| A. | lipopolysaccharide |
| B. | the cell wall |
| C. | the tip of the pilus |
| D. | the cell membrane |
| Answer» D. the cell membrane | |
| 3. |
Which of the following is/are synthesized from late mRNA? |
| A. | Phage structural proteins |
| B. | Proteins that help with phage assembly without becoming part of the virion structure |
| C. | Proteins involved in cell lysis and phage release |
| D. | All of the above |
| Answer» E. | |
| 4. |
The process by which phage reproduction is initiated in lysogenized culture is called |
| A. | infection |
| B. | integration |
| C. | repression |
| D. | induction |
| Answer» E. | |
| 5. |
The procapsid is assembled with the aid of __________ proteins. |
| A. | ladder |
| B. | framing |
| C. | scaffolding |
| D. | form |
| Answer» D. form | |
| 6. |
Which capsid symmetry is exhibited by most of the phages? |
| A. | Helical |
| B. | Icosahedral |
| C. | Complex |
| D. | None of these |
| Answer» C. Complex | |
| 7. |
__________ is specifically able to have a long-term relationship with the host known as lysogeny. |
| A. | Temperate virus |
| B. | Adsorbed virus |
| C. | RNA phage |
| D. | DNA phage |
| Answer» B. Adsorbed virus | |
| 8. |
T-even phage binding to E. coli probably involves |
| A. | electrostatic interaction |
| B. | hydrophobic interaction |
| C. | covalent bonds |
| D. | all of these |
| Answer» B. hydrophobic interaction | |
| 9. |
Contractile sheath of the tail is present in which of the following phages? |
| A. | T3 |
| B. | T2 |
| C. | P22 |
| D. | All of these |
| Answer» C. P22 | |
| 10. |
In viruses with envelopes |
| A. | the envelope and the embedded proteins are encoded by the viral nucleic acid |
| B. | the envelope is derived from the host but it contains embedded proteins coded by the viral nucleic acid |
| C. | the envelope is coded by the viral nucleic acids, but the proteins come from the host's membrane proteins |
| D. | the envelope and its imbedded proteins are derived from the host's membranes |
| Answer» C. the envelope is coded by the viral nucleic acids, but the proteins come from the host's membrane proteins | |
| 11. |
Which of the following bacteria can be typed by phage typing method? |
| A. | <i>Staphylococcus aureus</i> |
| B. | <i>Salmonella typhi</i> |
| C. | <i>Vibrio cholerae</i> |
| D. | All of these |
| Answer» E. | |
| 12. |
__________ protein keeps the prophage dormant and prevents virus reproduction. |
| A. | Operator |
| B. | Promotor |
| C. | Repressor |
| D. | Enhancer |
| Answer» D. Enhancer | |
| 13. |
The filamentous bacteriopohage infect male E. coli cells by attaching to |
| A. | lipopolysaccharide |
| B. | the cell wall |
| C. | the tip of the pilus |
| D. | the cell membrane |
| Answer» D. the cell membrane | |
| 14. |
A bacterial defense mechanism against bacteriophage is called |
| A. | concatamerization |
| B. | polymerization |
| C. | restriction |
| D. | lysogeny |
| Answer» D. lysogeny | |
| 15. |
Area of lysis on a bacterial lawn culture produced by a phage is known as |
| A. | pock |
| B. | plaque |
| C. | pox |
| D. | all of these |
| Answer» C. pox | |
| 16. |
One of the first enzymes synthesized by many bacteriophage is __________ , an RNA-dependent RNA polymerase. |
| A. | RNA transcriptase |
| B. | RNA polymerase |
| C. | RNA ligase |
| D. | RNA replicase |
| Answer» E. | |