MCQOPTIONS
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MCQOPTIONS
This section includes 26 Mcqs, each offering curated multiple-choice questions to sharpen your Vector Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What is the general target of bacteriocins? |
| A. | Nuclei |
| B. | Plasma mambrane |
| C. | Cell wall |
| D. | ECM |
| Answer» D. ECM | |
| 2. |
Bacteriocins are produced by bacteria in __________ |
| A. | Lag phase |
| B. | Log phase |
| C. | Transition phase |
| D. | S phase |
| Answer» E. | |
| 3. |
Bacteriocins are _______________ |
| A. | Toxic nucleic acids |
| B. | Non-ribosomally synthesized toxic proteins |
| C. | Ribosomally synthesized toxic proteins |
| D. | Modified normal proteins |
| Answer» D. Modified normal proteins | |
| 4. |
Streptomycin resistance is conferred by______________ |
| A. | Modification of antibiotic |
| B. | Modification of target |
| C. | Modification of uptake |
| D. | Using different insensitive pathway |
| Answer» C. Modification of uptake | |
| 5. |
Which of the following plasmids fir the definition of episomes? |
| A. | F factors |
| B. | R factors |
| C. | Col factors |
| D. | RTF factors |
| Answer» B. R factors | |
| 6. |
Which of the following antibiotic resistance is through alteration of uptake? |
| A. | Streptimycin |
| B. | Chloramphenicol |
| C. | Tetracyclin |
| D. | Rifampicin |
| Answer» D. Rifampicin | |
| 7. |
Pilli forming gene is a must for plasmid transfer. State whether it is true or false. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 8. |
In an experiment you want to express your gene of interest in a prokaryote through a plasmid. What would be your ideal copy number? |
| A. | 2 or 3 |
| B. | 10 |
| C. | 80 |
| D. | 100 |
| Answer» B. 10 | |
| 9. |
Which of the following is not a part of RTF? |
| A. | Origin of replication |
| B. | Chloranphemicol resistance |
| C. | Origin of transfer |
| D. | Pilli forming gene |
| Answer» C. Origin of transfer | |
| 10. |
Which class of plasmids assists in the production of bacteriocins? |
| A. | F plasmid |
| B. | F’ plasmid |
| C. | R plasmid |
| D. | Col plasmid |
| Answer» E. | |
| 11. |
Which of the following is not true about plasmids? |
| A. | They are extrachromosomal DNA |
| B. | They are double stranded |
| C. | They confer antibiotic resistance |
| D. | They may get incorporated in chromosome |
| Answer» E. | |
| 12. |
In which of the following will you expect plasmids to be absent? |
| A. | Streptococcus sp |
| B. | Schizosaccharomyces pombe |
| C. | Panthera sp |
| D. | Haemophilis sp |
| Answer» D. Haemophilis sp | |
| 13. |
WHICH_CHARACTERISTICS_DO_F-PLASMIDS_CONFER_TO_THE_HOST_BACTERIUM??$ |
| A. | Antibiotic resistance |
| B. | Fluorescent colonies |
| C. | Conjugative ability |
| D. | Virulence |
| Answer» D. Virulence | |
| 14. |
Col plasmids are responsible for ______$ |
| A. | Degrading unusual molecules |
| B. | Taking up colchicine stain |
| C. | Coding for colicins |
| D. | None |
| Answer» D. None | |
| 15. |
Degradative_plasmid_TOL,_responsible_for_the_metabolism_of_toluene_is_present_in_which_of_the_organisms?$ |
| A. | E.Coli |
| B. | Saccharomyces Cerevisiae |
| C. | Staphylococcus Aureus |
| D. | Pseudomonas putida |
| Answer» E. | |
| 16. |
Protection by covalent attachment of proteins in a plasmid, is a method for? |
| A. | increasing the conjugative abilities |
| B. | protection of linear DNA |
| C. | increasing the copy number |
| D. | increasing cloning efficiency |
| Answer» C. increasing the copy number | |
| 17. |
Which of the following is responsible for the conversion of covalently closed circular DNA to supercoiled DNA of the plasmid? |
| A. | Endonuclease |
| B. | DNA Gyrase |
| C. | Topoisomerase |
| D. | Exonuclease |
| Answer» C. Topoisomerase | |
| 18. |
Ti_plasmids_are______plasmids. |
| A. | Tumor inducing |
| B. | Degradation |
| C. | High copy number |
| D. | Mammalian |
| Answer» B. Degradation | |
| 19. |
Which of the following is not a type of plasmid? |
| A. | F |
| B. | R |
| C. | Ti |
| D. | T4 |
| Answer» E. | |
| 20. |
To be able to coexist in the same cell, different plasmids must be ______ |
| A. | Conjugative |
| B. | Of high copy number |
| C. | Stable at high temperatures |
| D. | Compatible |
| Answer» E. | |
| 21. |
How can conjugative and non-conjugative plasmids be differentiated? |
| A. | On the basis of size |
| B. | Presence of antibiotic resistance |
| C. | Number of cloning and digestion sites |
| D. | Presence of transfer genes |
| Answer» E. | |
| 22. |
What are relaxed plasmids? |
| A. | The ones having copy numbers above 50 per cell |
| B. | The ones that can’t be digested by endonucleases |
| C. | The ones that can’t be isolated |
| D. | The ones present in more than one strains of the same host |
| Answer» B. The ones that can‚Äö√Ñ√∂‚àö√ë‚àö¬•t be digested by endonucleases | |
| 23. |
The number of molecules of an individual plasmid that are normally found in a single bacterial cell is known as? |
| A. | Conjugative ability |
| B. | Competency |
| C. | Replicative ability |
| D. | Copy number |
| Answer» E. | |
| 24. |
Which among the following are the smallest plasmid and an ideal cloning vector? |
| A. | ColE1 |
| B. | RP4 |
| C. | PUC8 |
| D. | F |
| Answer» D. F | |
| 25. |
What are the possible ways through which a plasmid can replicate? |
| A. | Using cell’s own replicative enzymes |
| B. | Carry genes that code for special replicative enzymes |
| C. | Replicate by inserting themselves into a bacterial chromosome |
| D. | Carry genes that codes enzymes |
| Answer» D. Carry genes that codes enzymes | |
| 26. |
Which of the following is true for a plasmid? |
| A. | Contains an origin of replication |
| B. | Imparts a useful characteristic to the host bacterium |
| C. | Possesses one or more genes |
| D. | Replicates only when the host genome is undergoing replication |
| Answer» E. | |