MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Molecular Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In trans-splicing the excised intron forms a lariat structure. |
| A. | True |
| B. | False |
| Answer» C. | |
| 2. |
The transesterification reaction is ATP independent. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The second transesterification reaction occurs between __________ |
| A. | The 3’ splicing site of intron and 5’ splice site of intron |
| B. | The 3’ splicing site of intron and the branch point site |
| C. | The 5’ splicing site of intron and 3’ end of exon |
| D. | The 5’ end of exon and the 3’ splice site |
| Answer» E. | |
| 4. |
The first transesterification reaction between the branch point site and the 5’ splice site is a __________ reaction. |
| A. | SN1 |
| B. | SN2 |
| C. | E1 |
| D. | E2 |
| Answer» C. E1 | |
| 5. |
The 3’ end of an intron is marked by __________ |
| A. | Donor site |
| B. | Acceptor site |
| C. | AT rich site |
| D. | Branch point site |
| Answer» C. AT rich site | |
| 6. |
THE_TRANSESTERIFICATION_REACTION_IS_ATP_INDEPENDENT.?$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
In_trans-splicing_the_excised_intron_forms_a_lariat_structure.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 8. |
The second transesterification reaction occurs between _________? |
| A. | The 3’ splicing site of intron and 5’ splice site of intron |
| B. | The 3’ splicing site of intron and the branch point site |
| C. | The 5’ splicing site of intron and 3’ end of exon |
| D. | The 5’ end of exon and the 3’ splice site |
| Answer» E. | |
| 9. |
The first transesterification reaction between the branch point site and the 5’ splice site is a __________ reaction.$ |
| A. | SN1 |
| B. | SN2 |
| C. | E1 |
| D. | E2 |
| Answer» C. E1 | |
| 10. |
To achieve splicing of an intron how many phosphodiester bonds are formed __________ |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» C. 3 | |
| 11. |
How many consensus sequences for splicing are found in an exon? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 0 |
| Answer» E. | |
| 12. |
The highly conserved base at the branch point site is __________ |
| A. | A |
| B. | U |
| C. | G |
| D. | C |
| Answer» B. U | |
| 13. |
The 3’ end of an intron is marked by __________$ |
| A. | Donor site |
| B. | Acceptor site |
| C. | AT rich site |
| D. | Branch point site |
| Answer» C. AT rich site | |
| 14. |
During splicing which of the following sites is not recognized by the splicosome? |
| A. | Donor |
| B. | Branch point |
| C. | Acceptor |
| D. | G-rich site |
| Answer» E. | |
| 15. |
The splice site is found in __________ |
| A. | 3’ end of exon |
| B. | 5’ end of intron |
| C. | Within the exon |
| D. | Within the intron |
| Answer» C. Within the exon | |