Class 11-Biology-chapter 17 – : Locomotion and Movement InstructionTotal Questions : 20Total time :20 minTotal Marks : 20 x 3 = 60 MarksEach Correct Question carries : 3 MarksEach incorrect Question Carries : -1 MarksEach Unattempted Question carry : 0 MarksBe careful On Negative Markings 1. An acromian process is characteristically found in the Pectoral girdle of mammals Sperm of mammals Pelvic girdle of mammals Skull of frog None 2. Select the correct statement regarding the specific disorder of muscular or skeletal system. Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age Gout - Inflammation of joints due to extra deposition of calcium. Muscular dystrophy - age related shortening of muscles Myasthenia gravis - Autoimmune disorder which inhibits sliding of myosin filaments None 3. Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency? Insulin- Diabetes insipidus Parathyroid hormone- Tetany Relaxin- Gigantism Prolactin- Cretinism None 4. The H-zone in the skeletal muscle fibre is due to Extension of myosin filaments in the central portion of the A-band The central gap between myosin filaments in the A-bands The absence of myofibrils in the central porhon of A-band The central gap between actin filaments extending through myosin filaments in the A-band None 5. The term tetanus refers to A stronger contraction resulting from multiple motor unit summation The result of wave summation, which produces a smooth and sustained contraction of a muscle The state of muscle fatigue caused by depletion of ATP and accumulation of lactic acid3 The partial sustained contraction of major supporting muscles None 6. Which one of the following pairs of chemical substances is correctly categorized? Pepsin and prolactin - Two digestive enzymes secreted in stomach Secretin and rhodopsin - Polypeptide hormones Calcitonin and thymosin - Thyroid hormones Troponin and myosin - Complex proteins in striated muscles None 7. Which of the following contractile proteins contributes 55% of muscle protein by weight ? Troponin Actin Tropomyosin Myosin None 8. The intervertebral discs are pads of cartilage placed between two adjacent vertebrae; the regions of the vertebrae that are in contact with these pads are Articulating facets Centra Spinous processes Transverse processes None 9. The characteristic and an example of a synovial joint in humans is Lymph filled between two bones, limited movement : Gliding joint between carpals Fluid filled between two joints, provides cushion : Skull bones Fluid cartilage between two bones, limited movement : Knee joint Fluid filled synovial cavity between two bones : Joint between atlas and axis None 10. Select the correct statement regarding the specific disorder of muscular or skeletal system Gout - inflammation of joints due to extra deposition of calcium Myasthenia gravis- auto immune disorder which inhibits sliding of myosin filaments Muscular dystrophy - age related shortening of muslces Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age None 11. Skeletal muscles are striated as They show a pattern of cross-banding. They are made up of very few fibrils. They are made up of many fibres. They have many blood vessels. None 12. If the skeletal muscle fibres are soaked and treated with high concentration of salts, large quantities of proteins are removed. The fibres can no longer contract and the A-bands disappear. This shows that Actin is essential for contraction Proteins do not play any role in the contraction of fibres Both myosin and actin are essential for contraction Myosin is essential for contraction of the fibres None 13. Upon stimulation of skeletal muscles, calcium is immediately made available for binding to troponin from bone Wood lymph sarcoplasmic reticulum None 14. The joint between skull and atlas which allows nodding movement is called _______. Occipital condyle None of the above Atlanto-occipital joint Atlanto-axial joint None 15. Which one of the following is correctly matched? List IA Cytosine, uracil, thiamineB Malleus, incus, cochleaC Ilium, ischium, pubisD Actin, myosin, rhodopsin List II1 Pyrimidines2 Ear ossicles3 Coxal bones of the pelvic girdle4 Muscle proteins C B A D None 16. The further treatment of fibres with saturated salt solutions removes actin and its two associated proteins tropomyosin and troponin and also destroy the I-bands. This shows that the thin filaments are made up of................. proteins. None of the above Actin Myosin Tropomyosin and troponin None 17. An age-dependent disorder characterized by increased fragility and low bone mass resulting from deficiency of Ca and vitamin D is Rickets Oesteoporosis Rheumatoid arthritis Osteoarthritis None 18. The thin filaments of a myofibril contain two filaments of ___(A)__ actin and __(B)__ protein along with __(C)___ protein for masking binding site for myosin. A - F, B - troponin, C - Tropomyosin A - F, B - tropomyosin, C - troponin A - 2F, B - troponin, C - tropomyosin A - 1F, B - tropomyosin, C - troponin None 19. The contraction of one of the muscle rotates the forearm to turn the palm downward or backward. Identify the muscle from the following. Extensor Abductor Flexor and adductor Pronator None 20. The globular head of myosin contains ATPase enzyme. Troponin ATP Calcium ions in large quantities. 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