Q. No.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.
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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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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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| 1. | Elastic | 2. | Hyaline |
| 3. | Fibrous | 4. | Calcified |
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Which of the following is not a hinge joint in human body?
1. Knee joint
2. Elbow joint
3. Inter-phalangeal joint in hand
4. First caro-metacarpal joint
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| Column I | Column II | ||
| A | Myasthenia gravis | P | Auto-immune |
| B | Arthritis | Q | Inflammation of joints |
| C | Tetany | R | Low calcium in body fluids |
| D | Osteoporosis | S | Low levels of oestrogen |
| A | B | C | D | |
| 1. | P | Q | R | S |
| 2. | Q | R | S | P |
| 3. | R | S | P | Q |
| 4. | S | P | Q | R |
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| 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
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