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Q. No.Cells of human body exhibit three main types of movements. Cytoskeleton elements called microfilaments play an important role in:
A. Amoeboid movements
B. Ciliary movements
C. Muscular movements
1.
Only A
2.
Only A and B
3.
Only A and C
4.
A, B and C
A. Amoeboid movements
B. Ciliary movements
C. Muscular movements
Subtopic: Introduction to Locomotion |
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Identify the incorrect statement regarding the ultra-structure of a skeletal muscle:
| 1. | Z lines bisect the I band |
| 2. | G actin is a polymer of F actins |
| 3. | A subunit of troponin masks active binding sites for myosin on the actin filament. |
| 4. | Globular head of myosin has ATPase activity. |
Subtopic: Skeletal Muscle: Myofilaments |
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From NCERT
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Muscle:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | is derived from embryonic endoderm |
| II: | constitutes about 40-50 percent of human body |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Skeletal Muscle: Basic Anatomy |
83%
From NCERT
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Regarding a skeletal muscle fibre:
| I: | It is a syncytium. |
| II: | It has sarcoplasmic reticulum [a type of smooth ER] that stores calcium. |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Skeletal Muscle: Basic Anatomy |
88%
From NCERT
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Identify the incorrect statement regarding a sarcomere:
| 1. | Anisotropic band mainly contains myosin. |
| 2. | Isotropic band consists of actin. |
| 3. | The thick filaments are held together by an M-line. |
| 4. | Actin and myosin are arranged perpendicular to each other and also to the longitudinal axis of myofibrils. |
Subtopic: Skeletal Muscle: Sarcomere |
86%
From NCERT
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Consider the following two statements:
| 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 |
Subtopic: Skeletal Muscle: Sarcomere |
70%
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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 |
Subtopic: Human Skeleton: Introduction, Function, Parts | Axial Skeleton |
69%
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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 |
Subtopic: Vertebral column |
83%
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The ribs in humans:
| 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 I and II are correct | 4. | Both I and II are incorrect |
Subtopic: Sternum & Ribs |
79%
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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. |
Subtopic: Appendicular Skeleton: Upper Limb | Appendicular Skeleton |
86%
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