MCQOPTIONS
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MCQOPTIONS
This section includes 16 Mcqs, each offering curated multiple-choice questions to sharpen your Cytogenetics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A specialized transducing phage attacking an infected cell with lysogenic stage of the same virus gives rise to________ |
| A. | HFR |
| B. | HFT |
| C. | F’ |
| D. | F |
| Answer» C. F’ | |
| 2. |
In which of the following cases will the viral progeny generated retain their infection ability? |
| A. | A generalized trasducing phage affects a normal cell |
| B. | A specialized transducing phage affects a cell infected by same virus |
| C. | A specialized transducing phage will attack a normal cell |
| D. | A generalized transducing phage will affect a cell with a different viral infection |
| Answer» C. A specialized transducing phage will attack a normal cell | |
| 3. |
A specialized transducing virus attacks a healthy bacterial cell. What will be the virulence of the viruses produced by this bacterial cell after infection? |
| A. | They will me more virulent than original one |
| B. | They will be equally virulent as original one |
| C. | The virulence will depreciate |
| D. | No virulence |
| Answer» E. | |
| 4. |
You are checking the sequence of 3 genes using generalized transduction mapping. The recipient is Leu-, AziS, Thr- while the donor is Leu+, AziR, Thr +. If you select the Leu+ as marker, AziR would be 50% while Thr+ would be 2%. If you select Thr+ as marker Leu+ would be 3% and AziR would be 0%. What is the sequence? |
| A. | Thr Leu Azi |
| B. | Azi Thr Leu |
| C. | Azi Leu Thr |
| D. | Thr Azi Leu |
| Answer» B. Azi Thr Leu | |
| 5. |
A_SPECIALIZED_TRANSDUCING_VIRUS_ATTACKS_A_HEALTHY_BACTERIAL_CELL._WHAT_WILL_BE_THE_VIRULENCE_OF_THE_VIRUSES_PRODUCED_BY_THIS_BACTERIAL_CELL_AFTER_INFECTION??$ |
| A. | They will me more virulent than original one |
| B. | They will be equally virulent as original one |
| C. | The virulence will depreciate |
| D. | No virulence |
| Answer» E. | |
| 6. |
A specialized transducing phage attacking an infected cell with lysogenic stage of the same virus gives rise to________$ |
| A. | HFR |
| B. | HFT |
| C. | F’ |
| D. | F |
| Answer» C. F‚Äö√Ñ√∂‚àö√ë‚àö¬• | |
| 7. |
In_which_of_the_following_cases_will_the_viral_progeny_generated_retain_their_infection_ability?$ |
| A. | A generalized trasducing phage affects a normal cell |
| B. | A specialized transducing phage affects a cell infected by same virus |
| C. | A specialized transducing phage will attack a normal cell |
| D. | A generalized transducing phage will affect a cell with a different viral infection |
| Answer» C. A specialized transducing phage will attack a normal cell | |
| 8. |
The recombination study of phages is done using ____________ |
| A. | OD measurement |
| B. | Plaque assay |
| C. | Plating assay |
| D. | Boyden chamber assay |
| Answer» C. Plating assay | |
| 9. |
If the bacterial DNA sequence is Leu Met Att Gal Bio, which of the genes can be transferred via specialized transduction? |
| A. | Leu and Met |
| B. | Met, Att and Gal |
| C. | Gal and Bio |
| D. | Met and Gal only |
| Answer» E. | |
| 10. |
Which of these is correct according to transduction? |
| A. | Specialized transduction is due to excision error |
| B. | F’ plasmid can act in specialized transduction |
| C. | Only specialized transduction in virus can be used to cause genetic variations |
| D. | Bacteriophage nucleic acid is dispensable for virulence |
| Answer» B. F‚Äö√Ñ√∂‚àö√ë‚àö¬• plasmid can act in specialized transduction | |
| 11. |
The Phage is incorporated in the bacterial genome by _____________________ |
| A. | Single crossover event |
| B. | Two crossover event |
| C. | Three point recombination |
| D. | 4 crossover event |
| Answer» B. Two crossover event | |
| 12. |
Which of the following is not true for specialized transduction? |
| A. | The lysogenic viruses can perform this |
| B. | A variety of genes can be transformed in this case |
| C. | The viral genome is then incorporated in the bacterial genome |
| D. | It is seen in lamda phage like K12 |
| Answer» C. The viral genome is then incorporated in the bacterial genome | |
| 13. |
You are checking the sequence of 3 genes using generalized transduction mapping. The recipient is Leu-, AziS, Thr- while the donor is Leu+, AziR, Thr +. If you select the Leu+ as marker, AziR would be 50% while Thr+ would be 2%. If you select Thr+ as marker Leu+ would be 3% and AziR would be 0%. What is the sequence? |
| A. | Thr Leu Azi |
| B. | Azi Thr Leu |
| C. | Azi Leu Thr |
| D. | Thr Azi Leu |
| Answer» B. Azi Thr Leu | |
| 14. |
In a transduction experiment where the recipient is Met-, Ala-, Gal- you observe a recombinant phenotype Met+, Gal+ in some strains and Gal+ Ala+ in some strains. But in none of the cases can you find Met+ Ala+. What is the sequence of the gene? |
| A. | Met, Ala, Gal |
| B. | Met, Gal, Ala |
| C. | Gal, Met, Ala |
| D. | Gal, Ala, Met |
| Answer» C. Gal, Met, Ala | |
| 15. |
What is the capacity of viral gene storage termed as? |
| A. | Viral capacity |
| B. | Tight head capacity |
| C. | Head full capacity |
| D. | Virulent capacity |
| Answer» D. Virulent capacity | |
| 16. |
Which of the following viruses will be useful for transduction? |
| A. | T2 phage |
| B. | T4 phage |
| C. | T7 phage |
| D. | Lamda phage |
| Answer» E. | |