MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Which of these statements is false regarding white fibres of muscle? |
| A. | They contain a large number of sarcoplasmic reticula |
| B. | They derive energy from aerobic processes |
| C. | They are not rich in myoglobin |
| D. | They contain fewer mitochondria than red fibres |
| Answer» C. They are not rich in myoglobin | |
| 2. |
Which organelle is abundant in white fibres of muscles? |
| A. | Sarcoplasmic reticulum |
| B. | Nuclei |
| C. | Mitochondria |
| D. | Peroxisomes |
| Answer» B. Nuclei | |
| 3. |
Which organelle is abundant in red fibres of muscles? |
| A. | Sarcoplasmic reticulum |
| B. | Nuclei |
| C. | Mitochondria |
| D. | Peroxisomes |
| Answer» D. Peroxisomes | |
| 4. |
Which of these proteins store oxygen? |
| A. | Troponin |
| B. | Tropomyosin |
| C. | Myoglobin |
| D. | G actin |
| Answer» D. G actin | |
| 5. |
Why does the repeated activation of the muscles cause fatigue? |
| A. | Due to the aerobic breakdown of glycogen |
| B. | Due to the breakdown of glucose |
| C. | Due to glycogen formation |
| D. | Due to lactic acid accumulation |
| Answer» E. | |
| 6. |
F actin is a polymer of G actins. True or false? |
| A. | True |
| B. | False |
| Answer» B. False | |
| 7. |
What does acetylcholine generate in the sarcolemma? |
| A. | Resting potential |
| B. | Graded potential |
| C. | Action potential |
| D. | Membrane potential |
| Answer» D. Membrane potential | |
| 8. |
Which of these is a neurotransmitter? |
| A. | HMM |
| B. | Troponin |
| C. | ATPase |
| D. | Acetylcholine |
| Answer» E. | |
| 9. |
Which of these constitute a motor unit? |
| A. | Motor neuron + muscle fibres |
| B. | Motor neuron + fascia |
| C. | Motor neuron + muscle |
| D. | Motor neuron + muscle bundle |
| Answer» B. Motor neuron + fascia | |
| 10. |
What is present in the globular head of meromyosin? |
| A. | Troponin |
| B. | ATPase |
| C. | Tropomyosin |
| D. | LMM |
| Answer» C. Tropomyosin | |
| 11. |
Which of these is not a component of the thin filament? |
| A. | LMM |
| B. | Tropomyosin |
| C. | Troponin |
| D. | F actin |
| Answer» B. Tropomyosin | |
| 12. |
Which of these is found at the two ends of a sarcomere? |
| A. | H line |
| B. | A line |
| C. | M line |
| D. | Z line |
| Answer» E. | |
| 13. |
Which of these structures holds myosin filaments together? |
| A. | H line |
| B. | A line |
| C. | M line |
| D. | Z line |
| Answer» D. Z line | |
| 14. |
What is present in the centre of each I band? |
| A. | H line |
| B. | A line |
| C. | M line |
| D. | Z line |
| Answer» E. | |