Q. No.Which of the following leads to removal of masking of active sites for mysosin during muscle contraction?
1. Binding of ATP to its site on myosin head
2. Binding of calcium with a subunit of troponin
3. Binding of acetylcholine to its receptor on sarcolemma
4. Release of acetylcholine by anterior motor neuron
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| Statement I: | Red fibres are ‘red’ due to large amount of myoglobin. |
| Statement II: | Red muscles are also called as aerobic muscles. |
| 1. | Both Statement I and Statement II are correct and Statement II explains Statement I |
| 2. | Both Statement I and Statement II are correct but Statement II does not explain Statement I |
| 3. | Statement I is correct but Statement II is incorrect |
| 4. | Statement I is incorrect but Statement II is correct |
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| I: | Repeated activation of muscles can lead to fatigue. |
| II: | Repeated activation of muscles can lead to accumulation of lactic acid. |
2. Both I and II are correct but II does not explain I
3. I is correct but II is incorrect
4. I is incorrect but II is correct
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Consider the given statements regarding the human skull:
| I: | It has a total of 22 bones. |
| II: | Cranial bones are 14 in number and the facial bones are 8 in number. |
| III: | It is monocondylic. |
| IV: | A single hyoid bone is located at the base of the buccal cavity. |
The correct statements include:
| 1. | Only I | 2. | Only I and IV |
| 3. | Only II and III | 4. | Only I, II, and IV |
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Consider the given statements regarding the human vertebral column:
| I: | In adults, it is differentiated into cervical [7], thoracic [12], lumbar [5], sacral [1-fused] and coccygeal [1-fused] regions. |
| II: | The first vertebra is called as axis and it articulates with the occipital condyles. |
| III: | The spinal cord runs through a neural canal. |
| IV: | It protects the spinal cord, supports the head and serves as the point of attachment for the ribs and musculature of the back. |
The correct statements include:
| 1. Only I | 2. Only I and IV |
| 3. Only II and III | 4. Only I, III, and IV |
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I: have two articulation surfaces on its dorsal end and are hence called bicephalic.
II: connect to the sternum directly or indirectly with the help of hyaline cartilage.
| 1. | Only I is correct | 2. | Only II is correct |
| 3. | Both are correct | 4. | Both are incorrect |
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Identify the incorrect statement:
| 1. | Each limb in humans has 30 bones. |
| 2. | Metacarpals are 8 in number while the metatarsals are 7 in number. |
| 3. | Patella forms the knee cap. |
| 4. | Femur is the longest bone in the human body. |
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| 1. | seen in scapula and articulates with head of humerus |
| 2. | seen in coxal bone and articulates with head of femur |
| 3. | seen in clavicle and articulates with sternum |
| 4. | seen in femur and articulates with patella |
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Which of the following is not correct regarding scapula?
| I: | It is situated in the dorsal part of the thorax between the second and the seventh ribs |
| II: | Clavicle articulates with the acromion process of scapula. |
| 1. Only I | 2. Only II |
| 3. Both I and II | 4. Neither I nor II |
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