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Q. No.The immediate source of chemical energy that can be used by skeletal muscle tissue to allow muscle contraction is:
1.
glucose
2.
glycogen
3.
ATP
4.
creatine phosphate
Subtopic: Sliding Filament Theory | Energy for Muscle Contraction |
84%
From NCERT
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To form a cross bridge, during muscle contraction:
| 1. | the myosin head binds to the exposed active sites on actin utilising the energy from ATP hydrolysis |
| 2. | the myosin head binds to the exposed active sites on actin and then the ATP binds to its site on myosin head |
| 3. | the actin binds to the exposed active sites on myosin head utilising the energy from ATP hydrolysis |
| 4. | the actin binds to the exposed active sites on myosin head and then the ATP binds to its site on actin |
Subtopic: Sliding Filament Theory |
73%
From NCERT
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Consider the given two statements regarding the cycle of events taking place during skeletal muscle contraction:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | The myosin, hydrolysing ATP into ADP and Pi goes back to its relaxed state. |
| Statement II: | Cross bridge is broken when myosin releases ADP and Pi. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Sliding Filament Theory | Energy for Muscle Contraction |
From NCERT
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The process of skeletal muscle contraction continues till:
| 1. | Myosin goes back to its relaxed state. |
| 2. | A cross bridge is formed. |
| 3. | Ca2+ ions are pumped back to the sarcoplasmic cisternae. |
| 4. | Lactic acid accumulates in the muscle |
Subtopic: Excitation Contraction Coupling I | Excitation Contraction Coupling II | Sliding Filament Theory |
88%
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Consider the given two statements:
| Statement I: | Repeated activation of the muscles can lead to fatigue. |
| Statement II: | Repeated activation of the muscles can lead to the accumulation of lactic acid due to anaerobic breakdown of glycogen in them. |
| 1. | Statement I is correct; Statement II is correct |
| 2. | Statement I is correct; Statement II is incorrect |
| 3. | Statement I is incorrect; Statement II is correct |
| 4. | Statement I is incorrect; Statement II is incorrect |
Subtopic: Energy for Muscle Contraction | Muscle Contraction: Other Considerations |
89%
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The number of correct statement(s) from the given statements is/are:
1. 0
2. 1
3. 2
3. 3
| I: | Myoglobin content is very low in the red fibres. |
| II: | white muscle fibers contain plenty of mitochondria. |
| III: | The amount of sarcoplasmic reticulum is high in red muscle fibers. |
| IV: | White muscle fibres depend on anaerobic process for energy. |
2. 1
3. 2
3. 3
Subtopic: Skeletal Muscle: Basic Anatomy | Skeletal Muscle: Myofilaments | Skeletal Muscle: Sarcomere |
71%
From NCERT
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Identify the incorrect statement:
1. Only I and II
2. Only III and IV
3. Only II, III and IV
4. Only I
| I: | Axial skeleton comprises 80 bones distributed along the main axis of the body. |
| II: | The skull is composed of 22 bones. |
| III: | Cranial bones are 14 in number. |
| IV: | The facial region is made up of 8 skeletal elements which form the front part of the skull. |
1. Only I and II
2. Only III and IV
3. Only II, III and IV
4. Only I
Subtopic: Number of Bone in Axial Skeleton | Axial Skeleton |
60%
From NCERT
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Consider the given two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | A single U-shaped bone called hyoid is present at the base of the buccal cavity and it provides attachment to the tongue. |
| Statement II: | The skull region articulates with the superior region of the vertebral column with the help of two occipital condyles (dicondylic skull). |
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Axial Skeleton |
81%
From NCERT
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Consider the two statements:
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
| Statement I: | First seven pairs of the ribs are called true ribs and are attached to the thoracic vertebrae and ventrally connected to the sternum with the help of elastic cartilage. |
| Statement II: | The 8th, 9th and 10th pairs are false ribs and join the seventh rib with the help of elastic cartilage. |
1. Statement I is correct; Statement II is correct
2. Statement I is correct; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is incorrect; Statement II is incorrect
Subtopic: Sternum & Ribs |
64%
From NCERT
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The number of correct statement(s) regarding human adult skeleton from the given statements is/are:
1. 2
2. 3
3. 4
4. 5
| I: | Each limb is made of 30 bones. |
| II: | Carpals are 8 in number |
| III: | Tarsals are 7 in number |
| IV: | Metacarpals are 5 in number |
| V: | Metatarsals are 4 in number |
1. 2
2. 3
3. 4
4. 5
Subtopic: Appendicular Skeleton |
83%
From NCERT
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