MCQOPTIONS
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MCQOPTIONS
This section includes 16 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. |
Melanosomes are transferred into the developing hair by myosin ____ |
| A. | II |
| B. | III |
| C. | IV |
| D. | V |
| Answer» E. | |
| 2. |
Myosin I was discovered in the year _________ |
| A. | 1963 |
| B. | 1973 |
| C. | 1983 |
| D. | 1993 |
| Answer» C. 1983 | |
| 3. |
Myosin II filaments display a transient construction in ______________ |
| A. | nonmuscle cells |
| B. | muscle cells |
| C. | actin filaments |
| D. | tubulin filaments |
| Answer» B. muscle cells | |
| 4. |
Myosins VIII and _____ are present only in plant cells. |
| A. | IX |
| B. | X |
| C. | XI |
| D. | XII |
| Answer» D. XII | |
| 5. |
Type II myosins are found primarily in __________ |
| A. | plant cells |
| B. | muscle cells |
| C. | nerve cells |
| D. | liver hepatocytes |
| Answer» C. nerve cells | |
| 6. |
The head of the myosin binds the ___________ |
| A. | ATP |
| B. | ADP |
| C. | Actin filament |
| D. | Neurofilament |
| Answer» D. Neurofilament | |
| 7. |
Which type of myosins move toward the minus-end of a microfilament? |
| A. | myosin I |
| B. | myosin II |
| C. | myosin IV |
| D. | myosin VI |
| Answer» E. | |
| 8. |
Latrunculin blocks the ____________ |
| A. | plus-end of microfilaments |
| B. | minus-end of microfilaments |
| C. | actin monomers |
| D. | actin filaments |
| Answer» D. actin filaments | |
| 9. |
The drug cytochalasin blocks the _____________ |
| A. | ATP |
| B. | Microfilaments |
| C. | Plus-end of microfilaments |
| D. | Minus-end of microfilaments |
| Answer» D. Minus-end of microfilaments | |
| 10. |
The phenomenon of treadmilling is observed in microfilaments under the __________ state. |
| A. | steady |
| B. | isotonic |
| C. | hypertonic |
| D. | thermodynamically favorable |
| Answer» B. isotonic | |
| 11. |
The faster growing end of the microfilament is the plus-end. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 12. |
After incorporation into growing actin filaments, the associated ATP is _____________ |
| A. | degraded |
| B. | lysed |
| C. | hydrolyzed |
| D. | esterified |
| Answer» D. esterified | |
| 13. |
The identification of actin filaments in a cell can be done by using the protein ____________ |
| A. | myosin |
| B. | kinesin |
| C. | globulin |
| D. | vimentin |
| Answer» B. kinesin | |
| 14. |
Microfilaments are composed of globular subunits of _____________ |
| A. | myosin |
| B. | kinesin |
| C. | actin |
| D. | colchicine |
| Answer» D. colchicine | |
| 15. |
For cellular transport, plant cells rely on microfilaments. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 16. |
Microfilaments are mostly involved in _______________ processes. |
| A. | activation |
| B. | stimulation |
| C. | degradation |
| D. | motile |
| Answer» E. | |