MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Protein Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
After photoisomerization of the retinal molecule, which amino acid residue becomes a proton acceptor of the donor proton from the retinal molecule? |
| A. | Met69 |
| B. | Ala93 |
| C. | Lys216 |
| D. | Asp85 |
| Answer» E. | |
| 2. |
Which of the following conformation is showed by retinal after absorbing light? |
| A. | Bent trans |
| B. | Straight cis |
| C. | Straight trans |
| D. | Bent cis |
| Answer» E. | |
| 3. |
Which of the following bacterium is prominently known to contain bacteriorhodopsin? |
| A. | Aspergillus niger |
| B. | Entamoeba histolytica |
| C. | Escherichia coli |
| D. | Halobacterium salinarum |
| Answer» E. | |
| 4. |
The function of rhodopsin and bacteriorhodopsin is the same. |
| A. | True |
| B. | False |
| Answer» C. | |
| 5. |
What is the absorption maximum of bacteriorhodopsin? |
| A. | 448 nm |
| B. | 706 nm |
| C. | 346 nm |
| D. | 568 nm |
| Answer» E. | |
| 6. |
Which of the following is true for the cytoplasm of Halobacteria? |
| A. | It has fewer protons |
| B. | It is neutral |
| C. | It is highly acidic |
| D. | It is highly alkaline |
| Answer» E. | |
| 7. |
Which of the light powers the pumping of the protons across the membrane via bacteriorhodopsin? |
| A. | Infrared light |
| B. | Red light |
| C. | Ultraviolet light |
| D. | Greenlight |
| Answer» E. | |
| 8. |
Which of the following conformation is showed by retinal before absorbing light? |
| A. | Bent trans |
| B. | Bent cis |
| C. | Straight cis |
| D. | Straight trans |
| Answer» E. | |
| 9. |
Which of the following is true for bacteriorhodopsin? |
| A. | It is an extrinsic protein |
| B. | It is a lipid-anchored protein |
| C. | It is a peripheral protein |
| D. | It is an integral membrane protein |
| Answer» E. | |
| 10. |
The interaction of retinal with the helix G is of which type? |
| A. | Hydrophobic interaction |
| B. | Non-covalent interaction |
| C. | Hydrophobic interaction |
| D. | Covalent interaction |
| Answer» E. | |
| 11. |
How many transmembrane segments are present in the structure of bacteriorhodopsin? |
| A. | Nine transmembrane helices |
| B. | Eight transmembrane helices |
| C. | Six transmembrane helices |
| D. | Seven transmembrane helices |
| Answer» E. | |
| 12. |
Bacteriorhodopsin acts as a proton pump. |
| A. | False |
| B. | True |
| Answer» C. | |
| 13. |
The expression of bacteriorhodopsin is especially shown by which of the following organisms? |
| A. | Mammals |
| B. | Animals |
| C. | Birds |
| D. | Halobacteria |
| Answer» E. | |
| 14. |
Bacteriorhodopsins contain which of the following pigments? |
| A. | Chlorophyll |
| B. | Phycobilins |
| C. | Xanthophylls |
| D. | Retinal |
| Answer» E. | |
| 15. |
Which of the following protein can capture light energy? |
| A. | Glycophorin |
| B. | GLUT 1 |
| C. | T cell receptor |
| D. | Bacteriorhodopsin |
| Answer» E. | |