Q. No.Select the correct match for the parts labeled as A, B, C and D in the given diagram of a sarcomere:
A
B
C
D
1.
I band
A band
H zone
M line
2.
I band
H zone
M line
Z line
3.
A band
I band
Z line
M line
4.
H zone
I band
M line
Z line
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A: I is the active site to which the head of myosin binds during muscle contraction.
B: II is the site for ATP molecule.
C: The head shown has an ATPase activity.
| 1. Only C | 2. Only A |
| 3. Only B and C | 4. A, B and C |
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1. It makes up the I band of the sarcomere and A is Troponin, B is Tropomyosin and C is F-actin
2. It makes up the A band of the sarcomere and A is Troponin, B is Tropomyosin and C is F-actin
3. It makes up the I band of the sarcomere and A is Calmodulin, B is Tropomyosin and C is G-actin
4. It makes up the A band of the sarcomere and A is Calmodulin, B is Tropomyosin and C is F-actin
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I. The bone A has a saddle like depression where the pituitary gland is located inside the cranium.
II. The bone B provides attachment to tongue and does not articulate with any other bone in our body.
III. The structure C is a part of the occipital bone of the cranium and our skull has two such structures.
| 1. Only I and II | 2. Only I and III |
| 3. Only II and III | 4. I, II and III |
I. A is a part of the pectoral girdle and is commonly called as the collar bone.
II. B is the scapula, a part of the pectoral girdle, which directly articulates with the breast bone, sternum.
III. C represents carpal bones and the type of synovial joint seen between them is the saddle joint.
IV. D is the coxal bone and three such bones fuse to form the pelvic girdle.
V. E is patella that is also called as the knee cap.
VI. F represents tarsals and they are eight in number.
| 1. I and V only | 2. I, V and VI only |
| 3. II, III and IV only | 4. II, IV and VI only |
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I: The joint in figure A is called as the saddle joint.
II: The joint in figure B is the largest ball and socket joint in human body.
| 1. | Only I | 2. | Only II |
| 3. | Both I and II | 4. | Neither I nor II |
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I. Human ribs are dicondylic
II. A represents the vertebra-sternal ribs
III. B represents the vertebra-chondral ribs
IV. C are the false ribs
V. The costal cartilages shown are hyaline cartilages
| 1. Only I | 2. Only II, III and IV |
| 3. Only II and III | 4. Only I and IV |
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| 1. | Multiple sclerosis | 2. | Rheumatoid arthritis |
| 3. | Muscular dystrophy | 4. | Myasthenia gravis |
1. fibrous joints called as sutures that do not allow any mobility.
2. cartilaginous syndesmoses that allow limited mobility.
3. synovial joints where the elatin protein connects the two articulating bones and allow free movements.
4. fibrous joints called as gomphosis.
| I. Sliding or rotation | A |
| II. Breaking of cross bridge | B |
| III. Formation of cross bridge | C |
| I | II | III | |
| 1. | B | A | C |
| 2. | B | C | A |
| 3. | A | B | C |
| 4. | C | A | B |
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