MCQOPTIONS
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MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Cytogenetics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The Shine and Dalgarno is located in ____________ |
| A. | 5.8S rRNA ~ 20 nucleotide upstream to start site |
| B. | mRNA ~ 10 nucleotide upstream to start site |
| C. | 16S rRNA ~ 10 nucleotide upstream to start site |
| D. | 23S rRNA ~ 10 nucleotide upstream to start site |
| Answer» D. 23S rRNA ~ 10 nucleotide upstream to start site | |
| 2. |
State whether the enzyme PDF is a novel drug target for antibiotics. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
The 50S ribosomal subunit is folded in ______ major domains. |
| A. | 20 |
| B. | 4 |
| C. | 10 |
| D. | 6 |
| Answer» E. | |
| 4. |
The f-Met tRNA binds to ribosomal _______ site |
| A. | P |
| B. | A |
| C. | E |
| D. | G |
| Answer» B. A | |
| 5. |
Methionine amino peptidase will remove the N terminal formyl methionine if the N+1 amino acid is_________ |
| A. | Glycine |
| B. | Phenyl alanine |
| C. | Methionine |
| D. | Tyrosine |
| Answer» B. Phenyl alanine | |
| 6. |
Which metal acts as a cofactor for Methionyl aminopeptidase? |
| A. | Mg2+ |
| B. | Zn2+ |
| C. | Co2+ |
| D. | Mn2+ |
| Answer» D. Mn2+ | |
| 7. |
The tRNA f-Met-tRNA binds to __________ |
| A. | Formyl methinone |
| B. | Formic acid |
| C. | Metionine |
| D. | Glutamine |
| Answer» D. Glutamine | |
| 8. |
The ribosomal peptidyl transferase transfers ___________ |
| A. | An isolated amino acid to the peptide chain |
| B. | A peptide chain to an amino acid |
| C. | A peptide chain to another peptide chain |
| D. | An amino acid to a tRNA |
| Answer» C. A peptide chain to another peptide chain | |
| 9. |
Which ribosome recognized the transcription initiation site of the mRNA? |
| A. | 23S |
| B. | 5S |
| C. | 5.8S |
| D. | 18S |
| Answer» E. | |
| 10. |
Which of this is not a ribosomal protein? |
| A. | L21 |
| B. | S34 |
| C. | L4 |
| D. | S21 |
| Answer» C. L4 | |
| 11. |
If you gradually decrease the Mg2+ concentration of the solution of ribosomes, what will you expect? |
| A. | The subunits will associate faster |
| B. | The subunits will dissociate |
| C. | rRNA will separate from its protein |
| D. | The two subunits will dissociate into its rRNA |
| Answer» C. rRNA will separate from its protein | |
| 12. |
Which of these is transcribed by RNA pol III? |
| A. | 28S |
| B. | 16S |
| C. | 5.8S |
| D. | 5S |
| Answer» E. | |
| 13. |
Eukaryotic ribosomal subunits are _____________ |
| A. | 30S and 50S |
| B. | 30S and 50S |
| C. | 40S and 60S |
| D. | 30S and 60S |
| Answer» D. 30S and 60S | |