MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Cell Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of the following family of kinesins is incapable of movement along the microtubules? |
| A. | kinesin-1 |
| B. | kinesin-3 |
| C. | kinesin-13 |
| D. | kinesin-14 |
| Answer» D. kinesin-14 | |
| 2. |
Which protein moves towards the minus end of the microtubule track? |
| A. | Nac |
| B. | ARF |
| C. | Sar1 |
| D. | Ncd |
| Answer» E. | |
| 3. |
In an axon, microtubules are oriented with their __________________ facing the cell body. |
| A. | plus end |
| B. | minus end |
| C. | vertical axis |
| D. | periphery |
| Answer» C. vertical axis | |
| 4. |
Kinesins are plus end-directed microtubular proteins. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 5. |
Smallest microtubular motor proteins are __________________ |
| A. | dyeneins |
| B. | niacin |
| C. | thiamine |
| D. | kinesin |
| Answer» E. | |
| 6. |
Which motor protein superfamily does not move along the microtubules? |
| A. | Dynein |
| B. | Kinesin |
| C. | Myosin |
| D. | Calmodulin |
| Answer» D. Calmodulin | |
| 7. |
Movement of materials in an axon are mediated through ________________ that serve as cytoskeletal tracks. |
| A. | microtubules |
| B. | actin filaments |
| C. | microfilaments |
| D. | intermediate filaments |
| Answer» B. actin filaments | |
| 8. |
The drug colchicine promotes microtubule _____________ |
| A. | disassembly |
| B. | assembly |
| C. | acidification |
| D. | condensation |
| Answer» B. assembly | |
| 9. |
Neurofibrillary tangles, found in the brain cells of persons with neurodegenerative disorders consists of _______________ |
| A. | intermediate filaments |
| B. | microtubule-associated proteins |
| C. | microtubules |
| D. | phospholipids |
| Answer» C. microtubules | |
| 10. |
The microtubule-binding activity of MAPs is controlled by ______________ |
| A. | phosphorylation |
| B. | oxidation |
| C. | reduction |
| D. | hydrolysis |
| Answer» B. oxidation | |
| 11. |
Alpha-tubulin subunits terminate the plus end of the microtubule. |
| A. | True |
| B. | False |
| Answer» C. | |
| 12. |
All the protofilaments of a microtubule have the same _____________ |
| A. | polarity |
| B. | pH |
| C. | fluorescence |
| D. | torque |
| Answer» B. pH | |
| 13. |
How many protofilaments are present in a single mammalian microtubule? |
| A. | 5 |
| B. | 13 |
| C. | 20 |
| D. | 26 |
| Answer» C. 20 | |
| 14. |
Which type of macromolecules make up the wall of microtubules? |
| A. | globular proteins |
| B. | glycoproteins |
| C. | deoxyribonucleic acids |
| D. | carbohydrates |
| Answer» B. glycoproteins | |
| 15. |
Where in a eukaryotic cell, can a microtubule NOT be found? |
| A. | flagella |
| B. | mitotic spindle |
| C. | nucleus |
| D. | cilia |
| Answer» D. cilia | |