MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 12 Mcqs, each offering curated multiple-choice questions to sharpen your Genetic Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Choose the correct statement for the cI gene. |
| A. | It represses only cII gene |
| B. | It activates cII gene and represses cIII gene |
| C. | It represses both cII and cIII gene |
| D. | It activates both cII and cIII gene |
| Answer» D. It activates both cII and cIII gene | |
| 2. |
Choose the incorrect statement for lysogenic mode. |
| A. | PRE forms cI gene product which is responsible for activation of promoters |
| B. | The cII protein is responsible for interfering with cro and Q proteins and they are required for lytic life cycle |
| C. | The cII protein activates the promoter PINT |
| D. | The Int protein with host protein is responsible for site specific recombination |
| Answer» B. The cII protein is responsible for interfering with cro and Q proteins and they are required for lytic life cycle | |
| 3. |
What is the function of the N gene? |
| A. | It promotes the function of terminators |
| B. | It overrides the function of terminators |
| C. | It promotes the production of the cro gene |
| D. | It is responsible for making the infectious particle linear |
| Answer» C. It promotes the production of the cro gene | |
| 4. |
CHOOSE_THE_CORRECT_STATEMENT_FOR_CI_GENE.?$ |
| A. | It represses only cII gene |
| B. | It activates cII gene and represses cIII gene |
| C. | It represses both cII and cIII gene |
| D. | It activates both cII and cIII gene |
| Answer» D. It activates both cII and cIII gene | |
| 5. |
Choose the incorrect statement for lysogenic mode? |
| A. | PRE forms cI gene product which is responsible for activation of promoters |
| B. | The cII protein is responsible for interfering with cro and Q proteins and they are required for lytic life cyle |
| C. | The cII protein activates the promoter PINT |
| D. | The Int protein with host protein is responsible for site specific recombination |
| Answer» B. The cII protein is responsible for interfering with cro and Q proteins and they are required for lytic life cyle | |
| 6. |
Which gene is required for the lysogenic phage to be adopted? |
| A. | cI |
| B. | cII |
| C. | cIII |
| D. | All the three genes are interrelated |
| Answer» E. | |
| 7. |
Choose the correct statement for cII gene and its related function? |
| A. | The transcription is extended to the region of cII gene and it is termed as late transcription |
| B. | They are responsible for deactivating the promoter for repressor establishment |
| C. | This promoter is responsible to decide whether the life cycle would be lysogenic or lytic |
| D. | cII gene is responsible for other gene which is gene cIII |
| Answer» D. cII gene is responsible for other gene which is gene cIII | |
| 8. |
What is the function of N gene? |
| A. | It promotes the function of terminators |
| B. | It overrides the function of terminators |
| C. | It promotes the production of cro gene |
| D. | It is responsible for making the infectious particle linear |
| Answer» C. It promotes the production of cro gene | |
| 9. |
The immediate early transcripts direct synthesis of which genes? |
| A. | N genes |
| B. | cro genes |
| C. | Both N and cro genes |
| D. | PR and PL genes |
| Answer» D. PR and PL genes | |
| 10. |
Some changes are encountered in the infectious particle as it infects the cell. Choose the incorrect statement. |
| A. | The infectious particle circularizes upon causing infection by annealing at cos sites |
| B. | There are two promoters present, PR and PL |
| C. | Upon infection only PR is activated |
| D. | Promoters give rise to immediate early transcripts |
| Answer» D. Promoters give rise to immediate early transcripts | |
| 11. |
Choose the correct statement for the infectious particle of lambda phage. |
| A. | It is single stranded genome |
| B. | It is circular double stranded genome |
| C. | The ends are blunt with cos (cohesive) sequences |
| D. | The ends are created by cleavage at cos sites during phage packaging |
| Answer» E. | |
| 12. |
It is very important to study lambda biology as lambda phages are used for cloning purposes. Which of the statement is true for lambda phage? |
| A. | It is an example of temperate phage |
| B. | The fate of the phage is decided before it infects the cell |
| C. | The lysis fate is that where the phage inserts it genome into the bacterial genome and the replication goes on |
| D. | The lysogenic fate is that where the phage infects the cell and lysis is carried out |
| Answer» B. The fate of the phage is decided before it infects the cell | |