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