Q81.The contractile protein of skeletal muscle involving ATPase activity is
(1) Tropomyosin
(2) Myosin
(3) α-Actinin
(4) Troponin the
Ans.2
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Q82.An acromion process is characteristically found in the
(1) Pelvic girdle of mammals
(2) Skull of frog
(3) Pectoral girdle of mammals
(4) Sperm of mammals
Ans.3
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Q83.Which of the following abnormality will include the secretion of abnormal granules - pannus?
(1) Osteoarthritis
(2) Rheumatoid arthritis
(3) Gout
(4) Osteoporosis
Ans.2
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Q84.Which of the following are the regulatory proteins i the muscle contraction?
(1)Troponin and tropomyosin
(2) Tropesin and actin
(3) Myosin and tropomyosin
(4) Actin and tropomyosin
Ans.1
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Q85.Source of Ca²+for muscle contraction is both sarcoplasmic (endoplasmic) reticulum as well as extracellular fluid in case of
a.Skeletal muscles
b.Smooth muscles
c.Cardiac muscles
(1) a only
(2) b and c only
(3) a and c only
(4) b only
Ans.2
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Q86.Which of the following is not applicable to red muscle fibres when compared to white muscle fibres?
(1) Sustained contraction for long periods
(2) Rich in myoglobin
(3) Faster in contraction rate
(4) Rich in mitochondria
Ans .3
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Q87.What is common between the muscle fibers of extensor muscles of human back and those of flight muscles of the birds which remain in flight for long periods of time?
a. They are thinner, red colored.
b. They are thicker and light colored.
c. They have abundant mitochondria.
d. They have well developed sarcoplasmic reticulum.
e. They show slow rate of contractions for longer periods.
f. They show fast strenous activity.
g. They do not get fatigued early.
h. They get fatigued quickly.
(1) a, c, e, g, are common
(2) b, d, f, h are common
(3) All features are common at different times
(4) a, c, f, g are common
Ans 1
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Q88.During muscle contraction, which of the following does not occur?
(1) No change in length of anisotrophic band
(2) Decrease in length of isotropic band
(3) No change in length of Aband
(4) Decrease in length of actin myofilaments
Ans.4
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Q89.What would happen if ATP suddenly were not available after the sarcomere had started to shorten?
(1) Cross bridges would not be able to detach from actin
(2) Muscle would remain in a state of rigidity
(3) Muscle would relax immediately
(4) Both (1) & (2)
Ans .4
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Q90.Select the correct match regarding the specific disorder of muscular or skeletal system
(1) Myasthenia gravis - Auto immune disorder which inhibits sliding of myosin filaments
(2) Gout - inflammation of joints due to extra deposition of calcium
(3) Muscular dystrophy - age related shortening of muscles
(4) Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age
Ans.4
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