MCQOPTIONS
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MCQOPTIONS
This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Cytogenetics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
If give a segment – 5’CTGACCAUGGCCTAGAUGCCTCT, which AUG will the eukaryotic ribosome choose as initiation site? |
| A. | Any at random |
| B. | First |
| C. | Second |
| D. | None |
| Answer» C. Second | |
| 2. |
Which of the bases are important in detecting whether the AUG should be the start site for eukaryotic initiation? |
| A. | -2 and +3 |
| B. | -4 and +3 |
| C. | -3 and +4 |
| D. | -1 and +4 |
| Answer» D. -1 and +4 | |
| 3. |
If you compare the Kozak sequence with the SD sequence of the prokaryotes which is located at the greater distance from the start site? |
| A. | Equal distance |
| B. | Kozak |
| C. | Shine and Dalgarno sequence |
| D. | Both are too far to account |
| Answer» D. Both are too far to account | |
| 4. |
What is used to regulate translation initiation in eukaryotes? |
| A. | Turnover of mRNA |
| B. | Ubiquitination of ribosome |
| C. | Phosphorylation of IF2 |
| D. | Methylation of IF1a |
| Answer» D. Methylation of IF1a | |
| 5. |
Which proteins perform the function of preventing reassociation of ribosomal subunits, when they finish one translation, in eukaryotes? |
| A. | eIF1 and eIF3 |
| B. | eIF3 and eIF6 |
| C. | eIF2 and eIF4 |
| D. | eIF3 and eIF5 |
| Answer» C. eIF2 and eIF4 | |
| 6. |
If you see a GTP bound IF2 it is _________ |
| A. | Before initiation |
| B. | During initiation |
| C. | After initiation |
| D. | Not related to an initiation |
| Answer» B. During initiation | |
| 7. |
Which initiation factor prevents association of ribosome when not bound to mRNA? |
| A. | IF1 |
| B. | IF2 |
| C. | IF3 |
| D. | IF4 |
| Answer» D. IF4 | |
| 8. |
IF1 helps in correct placement of the initiation tRNA. How does it do so? |
| A. | By guiding it to P site |
| B. | By binding to A site |
| C. | By dissociating the ribosomal complex |
| D. | By binding to the P site |
| Answer» C. By dissociating the ribosomal complex | |
| 9. |
_____________ treated ribosomes will be able to carry out elongation and termination of previously initiated translation, but can’t initiate any new translation. |
| A. | Streptomycin |
| B. | Rifampicin |
| C. | Tetracyclin |
| D. | Colicin E3 |
| Answer» E. | |
| 10. |
The 16S rRNA binds the mRNA in its ___________ region. |
| A. | Body |
| B. | Head |
| C. | Neck |
| D. | Flap |
| Answer» D. Flap | |