- 1(current)
Q. No.| A: | Muscle bundles are held together by collagenous connective tissue layer called fascicle. |
| B: | Sarcoplasmic reticulum of muscle fibre is a store house of calcium ions. |
| C: | Striated appearance of skeletal muscle fibre is due to distribution pattern of actin and myosin proteins. |
| D: | M line is considered as functional unit of contraction called sarcomere. |
Choose the most appropriate answer from the options given below:
| 1. | C and D only | 2. | A, B and C only |
| 3. | B and C only | 4. | A, C and D only |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich of the following is correct statement ?
| 1. | Actin and regulatory proteins are located in thin filament. |
| 2. | Z-lines anchor myosin (thick) filament to the ends of the sarcomere. |
| 3. | Sarcoplasmic reticulum stores acetylcholine. |
| 4. | Myosin cross bridges contain calcium binding sites. |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyName the ion responsible for unmasking of active sites for myosin for cross-bridge activity during muscle contraction:
| 1. | Calcium | 2. | Magnesium |
| 3. | Sodium | 4. | Potassium |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following pairs of chemical substances, is correctly categorised?
| 1. | Pepsin and prolactin - Two digestive enzymes secreted in the stomach |
| 2. | Troponin and myosin - Complex proteins in striated muscles |
| 3. | Secretin and rhodopsin - Polypeptide hormones |
| 4. | Calcitonin and thymosin - Thyroid hormones |
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe contractile protein of skeletal muscle involving ATPase activity is:
1. tropomyosin
2. myosin
3. α-actinin
4. troponin
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology- 1(current)
Q. No.
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