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Q. No.What are the sequential steps in the formation and breakage of a cross-bridge in muscle contraction?
1.
Myosin head hydrolyzes ATP, attaches to actin, performs a power stroke, and releases ADP.
2.
Myosin head binds to ATP, detaches from actin, hydrolyzes ATP, and reattaches to actin.
3.
Myosin head releases ADP, binds to ATP, detaches from actin, and hydrolyzes ATP.
4.
Myosin head attaches to actin, performs a power stroke, binds ATP, and then detaches from actin.
Subtopic: Sliding Filament Theory |
Level 4: Below 35%
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Match the types of synovial joints listed in Column A with their corresponding examples in Column B:
Codes:
| Column A | Column B | ||
| A | Hinge Joint | P | Thumb Joint |
| B | Ball and Socket Joint | Q | Elbow |
| C | Pivot Joint | R | Neck (between the first and second cervical vertebrae) |
| D | Saddle Joint | S | Hip |
Codes:
| A | B | C | D | |
| 1. | Q | S | P | R |
| 2. | Q | S | R | P |
| 3. | S | Q | P | R |
| 4. | S | Q | R | P |
Subtopic: Synovial Joint |
78%
Level 2: 60%+
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Consider the given three statements:
| Statement I: | The first seven pairs of human ribs are vertebrosternal or true ribs. |
| Statement II: | The 8th, 9th, and 10th pairs of human ribs are vertebrochondral or false ribs. |
| Statement III: | The 11th and the 12th pair of human ribs are called the floating ribs. |
1. None of the statements are correct.
2. Only one of the statement is correct.
3. Two of the statements are correct.
4. All three statements are correct.
Subtopic: Sternum & Ribs |
95%
Level 1: 80%+
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Consider the given two statements.
1. Only Statement A is correct.
2. Only Statement B is correct.
3. Both Statement A and Statement B are correct.
4. Both Statement A and Statement B are incorrect.
| Statement A: | Skeletal muscle fiber is a syncytium. |
| Statement B: | Intercalated disc is a feature very frequently found in smooth muscles. |
2. Only Statement B is correct.
3. Both Statement A and Statement B are correct.
4. Both Statement A and Statement B are incorrect.
Subtopic: Skeletal Muscle: Basic Anatomy |
78%
Level 2: 60%+
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Consider the given two statements:
| Statement I: | Macrophages and leucocytes in blood exhibit amoeboid movement. |
| Statement II: | Passage of ova through the female reproductive tract is facilitated by the ciliary movement. |
| 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: Introduction to Locomotion |
95%
Level 1: 80%+
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Which tissue can be auto excitable?
| I: | Epithelium | II: | Connective |
| III: | Muscle | IV: | Neural |
| 1. | Only IV | 2. | III and IV |
| 3. | I and II | 4. | I, II, III and IV |
Subtopic: Connective Tissue |
Level 3: 35%-60%
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The sarcoplasmic reticulum in a skeletal muscle fiber is a type of
| 1. | smooth endoplasmic reticulum and stores acetylcholine |
| 2. | rough endoplasmic reticulum and stores acetylcholine |
| 3. | smooth endoplasmic reticulum and stores calcium |
| 4. | rough endoplasmic reticulum and stores calcium |
Subtopic: Skeletal Muscle: Sarcomere |
75%
Level 2: 60%+
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In the resting state, a subunit of __a__ masks the active binding sites for __b__ on the __c__ filaments.
| a | b | C | |
| 1. | Troponin | Myosin | Actin |
| 2. | Troponin | Actin | Myosin |
| 3. | Actin | Troponin | Myosin |
| 4. | Myosin | Actin | Troponin |
Subtopic: Skeletal Muscle: Myofilaments |
87%
Level 1: 80%+
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Identify the incorrect statement:
| 1. | Axial skeleton comprises 80 bones. |
| 2. | A paired U-shaped bone called hyoid is present at the base of the buccal cavity and it is also included in the skull. |
| 3. | Each middle ear contains three tiny bones – Malleus, Incus and Stapes, collectively called Ear Ossicles. |
| 4. | The skull region articulates with the superior region of the vertebral column with the help of two occipital condyles (dicondylic skull). |
Subtopic: Axial Skeleton |
86%
Level 1: 80%+
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The number of cervical vertebrae are seven in:
1. All mammals
2. Only humans
3. Almost all mammals
4. Only a few mammals
1. All mammals
2. Only humans
3. Almost all mammals
4. Only a few mammals
Subtopic: Vertebral column |
77%
Level 2: 60%+
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