MCQOPTIONS
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MCQOPTIONS
This section includes 12 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 prevents sacromeres from pulling apart during muscle stretching? |
| A. | titin |
| B. | vimentin |
| C. | myosin |
| D. | actin |
| Answer» B. vimentin | |
| 2. |
Titin is the largest protein discovered till date. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Troponin is composed of _____ subunits. |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 4. |
Each tropomyosin is associated with _______ subunits of actin subunits. |
| A. | 2 |
| B. | 3 |
| C. | 7 |
| D. | 9 |
| Answer» D. 9 | |
| 5. |
Which of the following proteins are not found in muscle fibres? |
| A. | keratin |
| B. | actin |
| C. | troponin |
| D. | tropomyosin |
| Answer» B. actin | |
| 6. |
According to Sliding filament model of muscle contraction , shortening of sacromeres results from sliding of the filaments. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
The Sliding filament model of muscle contraction was proposed in the year ____________ |
| A. | 1954 |
| B. | 1964 |
| C. | 1974 |
| D. | 1984 |
| Answer» B. 1964 | |
| 8. |
________ of the sacromere remains unaffected during the muscle contraction. |
| A. | H zone |
| B. | A band |
| C. | I band |
| D. | H band |
| Answer» C. I band | |
| 9. |
All skeletal muscles operate by _______________ |
| A. | shortening |
| B. | exciting |
| C. | firing |
| D. | contracting |
| Answer» B. exciting | |
| 10. |
The striated appearance of muscle fibers is due to _______________ |
| A. | nucleus |
| B. | sacromeres |
| C. | sarcoma |
| D. | myoblasts |
| Answer» C. sarcoma | |
| 11. |
Muscle cells are formed from the fusion of ___________ |
| A. | myoblasts |
| B. | fibroblasts |
| C. | mast cells |
| D. | neurons |
| Answer» B. fibroblasts | |
| 12. |
Muscle cells are ___________ |
| A. | irregularly shaped |
| B. | cylindrically shaped |
| C. | extremely fragile |
| D. | extremely labile |
| Answer» C. extremely fragile | |