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. The term tetanus refers to The state of muscle fatigue caused by depletion of ATP and accumulation of lactic acid3 The result of wave summation, which produces a smooth and sustained contraction of a muscle The partial sustained contraction of major supporting muscles A stronger contraction resulting from multiple motor unit summation None 2. 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 3. Which one of the following pairs of chemical substances is correctly categorized? Secretin and rhodopsin - Polypeptide hormones Troponin and myosin - Complex proteins in striated muscles Pepsin and prolactin - Two digestive enzymes secreted in stomach Calcitonin and thymosin - Thyroid hormones None 4. 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 5. An acromian process is characteristically found in the Pelvic girdle of mammals Skull of frog Sperm of mammals Pectoral girdle of mammals None 6. 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 Muscular dystrophy - age related shortening of muscles Gout - Inflammation of joints due to extra deposition of calcium. Myasthenia gravis - Autoimmune disorder which inhibits sliding of myosin filaments None 7. Skeletal muscles are striated as They are made up of very few fibrils. They are made up of many fibres. They show a pattern of cross-banding. They have many blood vessels. None 8. 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 Both myosin and actin are essential for contraction Myosin is essential for contraction of the fibres Proteins do not play any role in the contraction of fibres None 9. The joint between skull and atlas which allows nodding movement is called _______. Atlanto-axial joint None of the above Atlanto-occipital joint Occipital condyle None 10. Select the correct statement regarding the specific disorder of muscular or skeletal system Myasthenia gravis- auto immune disorder which inhibits sliding of myosin filaments 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 muslces None 11. An age-dependent disorder characterized by increased fragility and low bone mass resulting from deficiency of Ca and vitamin D is Osteoarthritis Rheumatoid arthritis Oesteoporosis Rickets None 12. 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 Transverse processes Spinous processes None 13. 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 B D C A None 14. 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 synovial cavity between two bones : Joint between atlas and axis Fluid cartilage between two bones, limited movement : Knee joint Fluid filled between two joints, provides cushion : Skull bones None 15. Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency? Parathyroid hormone- Tetany Relaxin- Gigantism Prolactin- Cretinism Insulin- Diabetes insipidus None 16. Upon stimulation of skeletal muscles, calcium is immediately made available for binding to troponin from lymph sarcoplasmic reticulum Wood bone None 17. Which of the following contractile proteins contributes 55% of muscle protein by weight ? Tropomyosin Myosin Actin Troponin None 18. 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. Tropomyosin and troponin Actin None of the above Myosin None 19. The H-zone in the skeletal muscle fibre is due to The central gap between actin filaments extending through myosin filaments in the A-band The central gap between myosin filaments in the A-bands The absence of myofibrils in the central porhon of A-band Extension of myosin filaments in the central portion of the A-band None 20. The globular head of myosin contains Calcium ions in large quantities. ATP Troponin ATPase enzyme. 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