MCQOPTIONS
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MCQOPTIONS
This section includes 17 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. |
How many channels are present in the ribosome? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 2. |
Only a single stranded RNA can pass through the ribosome for decoding. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
With respect to the mRNA – ribosome complex for translation mechanism which of the following pair is wrong? |
| A. | Small subunit – decoding center |
| B. | A site – aminoacylated tRNA binding site |
| C. | P site – peptidyl tRNA binding site |
| D. | E site – polypeptide exit site |
| Answer» E. | |
| 4. |
The reaction to form a new peptide bond is known as the peptidyl transferase reaction. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Check which one of the following mechanisms is wrongly paired with its location of occurrence? |
| A. | Transcription – nucleus |
| B. | Post transcriptional mechanism – ER |
| C. | Translation – cytoplasm |
| D. | Post translational mechanism – ER |
| Answer» C. Translation – cytoplasm | |
| 6. |
Ribosome begins its translation at the 3’ end of the mRNA in prokaryotes. |
| A. | True |
| B. | False |
| Answer» C. | |
| 7. |
WITH_RESPECT_TO_THE_MRNA_‚ÄÖ√Ñ√∂‚ÀÖ√Ë‚ÀÖ¬®_RIBOSOME_COMPLEX_FOR_TRANSLATION_MECHANISM_WHICH_OF_THE_FOLLOWING_PAIR_IS_WRONG??$# |
| A. | Small subunit – decoding center |
| B. | A site – aminoacylated tRNA binding site |
| C. | P site – peptidyl tRNA binding site |
| D. | E site – polypeptide exit site |
| Answer» E. | |
| 8. |
How many channels are present in the ribosome?$ |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 9. |
Only_a_single_stranded_RNA_can_pass_through_the_ribosome_for_decoding.$ |
| A. | True |
| B. | False |
| Answer» B. False | |
| 10. |
Where does ribosome gets the energy for the formation of peptide bond? |
| A. | Breaking of the keto bond |
| B. | Breaking of acyl bond |
| C. | Simultaneous hydrolysis of ATP |
| D. | Energy released during peptidyl transferase reaction |
| Answer» C. Simultaneous hydrolysis of ATP | |
| 11. |
The reaction to form a new peptide bond is known as the peptidyl transferase reaction |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
What is the actual substrate for each round of amino acid addition? |
| A. | Ribosome |
| B. | Amino acid |
| C. | mRNA |
| D. | tRNA |
| Answer» E. | |
| 13. |
An mRNA bearing multiple ribosomes is known as______________ |
| A. | Small subunit-mRNA-initiator tRNA complex |
| B. | mRNA ribosome complex |
| C. | Polyamine-ribosome complex |
| D. | Polysome |
| Answer» E. | |
| 14. |
With respect to the subunits of ribosome which of the following is wrongly paired? |
| A. | Ribosome = rRNA + protein |
| B. | Large subunit = decoding center |
| C. | Small subunit = decoding center |
| D. | Subunit sedimentation unit = Svedberg |
| Answer» C. Small subunit = decoding center | |
| 15. |
Check which one of the following mechanisms is wrongly paired with its location of occurrence. |
| A. | Transcription – nucleus |
| B. | Post transcriptional mechanism – ER |
| C. | Translation – cytoplasm |
| D. | Post translational mechanism – ER |
| Answer» C. Translation ‚Äö√Ñ√∂‚àö√ë‚àö¬® cytoplasm | |
| 16. |
Ribosome begins its translation at the 3’ end of the mRNA in prokaryotes.$ |
| A. | True |
| B. | False |
| Answer» C. | |
| 17. |
With respect to polymerization of amino acids which of the following statements is wrong? |
| A. | The polymerization machinery consists of fifty proteins and two RNA molecules |
| B. | Overall molecular mass 2.5 megadalton |
| C. | Occurs at a slow pace of only 2 – 20 amino acids per second |
| D. | In eukaryotes the process occurs in the cytoplasm |
| Answer» B. Overall molecular mass 2.5 megadalton | |