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1.

Consider the diagram of thin myofilament. Now, read carefully the statements about molecular arrangement of actin and myosin in the filament. I. Each actin (thin filament ) is made up of 2 F-(filamentous) actins. II. F-actin is the polymer of G-(globular) actin. III. Two-F-actins are twisted into a helix. IV. Two strands of tropomyosin run along the entire length of F-actin. Choose the correct option.A. I and IIB. III and IVC. I and IVD. All of the above

Answer» Correct Answer - d
2.

The collar bone is also known asA. clavicleB. scapulaC. pollexD. phalenges

Answer» Correct Answer - a
3.

Elbow joint is an example ofA. pivot jointB. hinge jointsC. gliding jointD. ball and socket joint

Answer» Correct Answer - b
4.

Which one of the following items gives its correct total numberA. Floating ribs in humans - 4B. Amino acdis found in protein - 16C. Types of diabetes - 3D. Cervical vertebrae in humans - 8

Answer» Correct Answer - a
5.

The muscle fibres that contract slowly areA. red muscle fibresB. white muscle fibresC. Both (a) and (b)D. None of these

Answer» Correct Answer - a
6.

Skeletal muscles fibre has light and dark bands. Which is correct match of protein with its light refractive property and colourA. `{:(,"Protein",,"Colour",,"Property"),(,"Myosin",,"Light",,"Anisotropic"):}`B. `{:(,"Protein",,"Colour",,"Property"),(,"Actin",,"Dark",,"Anisotropic"):}`C. `{:(,"Protein",,"Colour",,"Property"),(,"Myosin",,"Dark",,"Isotropic"):}`D. `{:(,"Protein",,"Colour",,"Property"),(,"Actin",,"Light",,"Isotropic"):}`

Answer» Correct Answer - d
7.

Myoglobin of skeletal musclesA. is present in sarcoplasmB. stores carbon dioxideC. stores oxygenD. Both (a) and (b)

Answer» Correct Answer - d
8.

Match the following lists with reference to disorders of the muscular and skeletal system. A. `{:(,"A",,"B",,"C",,"D"),(, 2,,3,,4,,1):}`B. `{:(,"A",,"B",,"C",,"D"),(, 2,,4,,3,,1):}`C. `{:(,"A",,"B",,"C",,"D"),(, 3,,2,,1,,4):}`D. `{:(,"A",,"B",,"C",,"D"),(, 2,,3,,1,,4):}`

Answer» Correct Answer - b
9.

The characteristics and an example of a symbol joint in humans is `{:(,"Characterstics","Example"),((a),"Lymph filled between two bones, limited movement","Gliding joint between carpals"),((b),"Fluid cartilage between two bones, limited movements","Knee joint"),((c),"Fluid filled between two joints, provides cushion","Skull bones"),((d),"Fluid filled synovial cavity between two bones","Joint between atlas and axis"):}`A. `{:(,"Characteristics",,"Example"),(,"Fluid filled between two joints, provides cushion",,"Skull bones"):}`B. `{:(,"Characteristics",,"Example"),(,"Fluid-filled synovial cavity between two bones",,"Joint between atlas and axis"):}`C. `{:(,"Characteristics",,"Example"),(,"Lymph-filled between two bones, limited movement",,"Gliding, joint"):}`D. `{:(,"Characteristics",,"Example"),(,"Fluid catilage between two bones, limited movement",,"Knee joint"):}`

Answer» Correct Answer - b
Synovial joints are characterised by the presence of a fluid filled synovial cavity between the articulating surfaces of the two bones. Such an arrangement allow considerable movement. These joints help in locomotion and many other movements. Ball and socket joint (between humerus and pectoralgirdle), HInge joint (knee joint), Pivot joint (between atlas and axis), Gliding joint (between the carpals) and Saddle joint (between carpal and metacarpal of thumb) are some example.
10.

Choose the correct statement (s) for the flagellar movements.A. They are found in choanocytes of spongesB. Human sperm also show thisC. They help in movement in ParameciumD. Both (a) and (b)

Answer» Correct Answer - d
11.

Ciliary movement helps inA. removing waste substances ihaled along with airB. movement of leucocytes an microfilamentsC. Contraction and relaxation of musclesD. All of the above

Answer» Correct Answer - a
12.

Locomotion is rare inA. animalsB. reptilesC. PlantsD. Both (a) and (b)

Answer» Correct Answer - c
13.

Which one of the following movements in man are directing concerned with locomotion ?A. Bending of arm at elbowB. Rotation of head of femur in accetabulumC. Peristaltic movementD. Contraction of the heart

Answer» Correct Answer - b
14.

Assertion There are similarities between the locomotion of unicellular organisms and multicellular animal. Reason Ciliary, flagellar and amoeboid movements occur in unicellular organisms.A. Both Assertion and Reason are true and Reason is the correct explanation of AssertionB. Both Assertion and Reason are true, but Reason is not the correc explanation of AssertionC. Assertion is false, but Reason is trueD. Both Assertion and Reason are false

Answer» Correct Answer - b
The movement found in unicellular organisms are ciliary, flagellar and amoeboid types, In multicellular animals also, phagocytes migrate through the tissues by amoeboid movements. Ciliary movements are seen in cells lining the upper repiratory tract, fallopian tubes and vasa efferentia of testes, etc. Mammalian sperms move into the female reproductive tract by the flagellar movements.
15.

Muscular dystrophy in humans is aA. viral diseaseB. bacterial diseaseC. genetic diseaseD. fungal diseases

Answer» Correct Answer - c
16.

Select the correct statement with respect to locomotion in humansA. Accumulation of uric acid crystals in joints causes their inflammation.B. The vertebral column has 10 thoracic vertebraeC. The joint between adjacent vertebrae is a fibrous jointD. The decreased level of progesterone causes osteporosis in old people

Answer» Correct Answer - a
17.

The portion between two successive Z-line is calledA. sarcomereB. N-bandC. M-lineD. l-band

Answer» Correct Answer - a
18.

The length of sarcomere is aboutA. `2-3mu`B. `0.1-0.9mu`C. `3-10 mu`D. `10 mu`

Answer» Correct Answer - a
19.

The myofibris are surrounded by a canalicular network ofA. SarcolemmaB. Sarcoplasmic reticulumC. T-tubulesD. Both (a) and (c)

Answer» Correct Answer - d
20.

Actin binding sites are located overA. troponinB. tropomyosinC. meromyosinD. Both (b) and (c )

Answer» Correct Answer - b
21.

The bone of pelvic girdle that participates in the formation of acetabulum isA. iliumB. PubisC. ischiumD. All of these

Answer» Correct Answer - d
22.

Muscles which bend the joint isA. flexorB. extensorC. involutionD. twitch

Answer» Correct Answer - a
23.

The major contractile proteins of muscles is/areA. actinB. myosinC. Both (a) and (b)D. albumin

Answer» Correct Answer - c
24.

Which one is a mismatchA. Sternum and ribs -Axial skeletonB. Clavicle and glenoid cavity -Pelvic girdleC. Humerus and ulna -Appendicular skeletonD. Malleus and stapes -Ear ossicles

Answer» Correct Answer - b
25.

Which is correctly categorised ?A. Troponin and myosin - Complex proteins in striated musclesB. Calcitonin and thymosin - Thyroid hormonesC. Pepsin - Digestive enyzmes secreted in stomachD. Secretin and rhodopsin - Polypeptide hormones

Answer» Correct Answer - a
26.

Which one of the following statement is true ?A. Head of humerus beon articulates with acetabulum of pectoral girdleB. Head of humergus bone articulates with glenoid cavity of potential girdleC. Head of humerus bone articulatas with a cavity called acetabulum of pelvic girdleD. Head of humerus bone articulates with glenoid cavity of pelvic girdle

Answer» Correct Answer - b
27.

Function of pre and posyzygopophysis is toA. allow the maximum bending of vertebraeB. prevent undue bending of adjacent vertebraeC. prevent displacement of the adjacent vertebraeD. Both (a) and (b)

Answer» Correct Answer - c
28.

Identify the marked structures in the given figure. A. A-Sarcomere, B-H-zone, C-A band, D-ActinB. A-H-zone, B-A-band, C-Actin, D-SarcomereC. A-Actin, B-H-zone, C-A-band, D-SarcomereD. A-Sarcomere, B-A-band, C-H-zone, D- Actin

Answer» Correct Answer - a
29.

The joints between atlas ans axis of mammals is an example ofA. pivot jointsB. hinge jointsC. saddle jointsD. gliding joint

Answer» Correct Answer - a
30.

Select the correct statement regarding the specific disorder of musclular or skeletal system.A. Muscular dystrophy -Age related shortening of musclesB. Osteoporosis -Decrease in bone mass and higher chances of fractures with advancing ageC. Myasthenia gravis -Autoimmune disorder which inhibits sliding of myosin filamentsD. Gout -Inflammation of joints due to extra deposition of calcium

Answer» Correct Answer - b
Osteporosis is an age related disease in which bones loose minerals and fibers from the matrix causing decrease bone mass and higher chances of fractures with advancing age. Major causative factors of osteoporosis are imbalance of hormones like calcitonin of thyroid, parathormone of parathyroids, sex hormones and deficiencies of calcium and vitamins.
31.

In old age, stiffness of joints is due to theA. hardening of bonesB. ineffciency of musclesC. decrease in synovial fluidD. enlargement of bones

Answer» Correct Answer - c
32.

Adductor muscle is antagonist ofA. abductorB. FlexorC. pronatorD. rotator

Answer» Correct Answer - a
33.

The muscle around the openings like iris areA. sphincterB. rotatorC. dilatorD. elevator

Answer» Correct Answer - c
34.

The last two pairs of ribs are named floating ribs becauseA. their sternal parts are attached to the sternum directlyB. their sternal parts are attached on the seventh pair of ribsC. their sternal parts remain free and do not even reach the sternumD. None of the above

Answer» Correct Answer - c
35.

Choose the correct match pair.A. Opisthocoelus - Lower amphibians and most fishesB. Heterocoelus - MammalsC. Amphiplotyon - BirdsD. Amphicoelus - Frog vertebrae

Answer» Correct Answer - a
36.

Select the correct match pair.A. Abductor - Triceps extending forearm.B. Adductor - Biceps bending forearm towards upper armC. Elevator -Latissimus dorsiD. Rotator -Pyriformis that raises thigh

Answer» Correct Answer - d
37.

The examples of exoskeletal systme in vertebrates is/areA. nailsB. hornsC. hoofsD. All of these

Answer» Correct Answer - d
38.

Assertion Muscle as a whole does not obey All-or-none law. Reason Each muscle fibre contracts maximally whenever it contracts.A. Both Assertion and Reason are true and Reason is the correct explanation of AssertionB. Both Assertion and Reason are true, but Reason is not the correc explanation of AssertionC. Assertion is false, but Reason is trueD. Both Assertion and Reason are false

Answer» Correct Answer - b
Muscle as a whole does not obey All or None law, although individual muscle fibre consitituting the muscle obey it. This is due to the fact that the strength of the threshold stimulus varies can stimulus varies from muscle fibre to muscle fibre. A weak stimulus can stimulate only a few fibres, which have low threshold, but a stronger stimulus stimulates a larger number of fibres by stimulating even those with high thresholds.
39.

How many muscles are present in human body?A. 639B. 640C. 635D. 750

Answer» Correct Answer - a
40.

The longest part of sternum isA. merosternumB. xiphisternumC. prosternumD. metasternum

Answer» Correct Answer - a
41.

The longest smooth muscle isA. gluteus maximusB. massetesC. rectus abdominisD. None of these

Answer» Correct Answer - c
42.

Acetabulum is a concave surface ofA. PelvisB. pectoralC. foramen magnumD. foramen monro

Answer» Correct Answer - a
43.

Match the following Columns. A. `{:(,"A",,"B",,"C",,"D"),(, 2,,1,,3,,4):}`B. `{:(,"A",,"B",,"C",,"D"),(, 4,,3,,1,,2):}`C. `{:(,"A",,"B",,"C",,"D"),(, 2,,1,,4,,3):}`D. `{:(,"A",,"B",,"C",,"D"),(, 4,,1,,2,,4):}`

Answer» Correct Answer - b
44.

Match the following Columns. A. `{:(,"A",,"B",,"C",,"D",,"E"),(, 3,,5,,1,,2,,4):}`B. `{:(,"A",,"B",,"C",,"D",,"E"),(, 1,,2,,3,,4,,5):}`C. `{:(,"A",,"B",,"C",,"D",,"E"),(, 4,,3,,2,,1,,5):}`D. `{:(,"A",,"B",,"C",,"D",,"E"),(, 5,,2,,3,,1,,4):}`

Answer» Correct Answer - a
45.

In producing movement, joints act asA. effortB. fulcrumC. resistanceD. load

Answer» Correct Answer - b
46.

Pectoral girdle constituteA. scapula and clavicleB. radius and ulnaC. ilium and ishiumD. maxilla and mandible

Answer» Correct Answer - a
Pectoral girdle is the bony or cartilaginous structure in vertebrates to which the anterior limbs (pectoral fins, forelegs or arms) are attached. In mammals, it consists of two dorsal scapula (shoulder blades) attached to the backbone and two ventral clavicles (collar bones) attached to the sternum (breast bone).
47.

The sensation of fatigue in the muscles due to prolonged strenuous physical work. is caused by (2010) A. a decrease in the supply of oxygenB. minor wear and tear of muscle fibresC. the depletion of glucoseD. the accumulation of lactic acid

Answer» Correct Answer - d
The reduction in force of contraction of a muscle after prolonged stimulation is called muscle fatigue. This happens due to accumulation of lactic acid. It is produced by glycolysis in the absence of `O_(2)` .
48.

Which one of the following is not a disorder of bone ?A. ArthritisB. OsteoporosisC. RicketsD. Atherosclerosis

Answer» Correct Answer - d
49.

Which of the following statements is correct ?A. Capitulum process articulates with ulna of lower armB. Trochlea articulates with radius of lower armC. Ulna articulates with humerus through olecranon processD. Pelvis in males has larger diameter

Answer» Correct Answer - c
50.

Read the following statements and pick the correct one.A. In platybasic skull eye are not situated much apart.B. In tropibasic skull eyes and brain are present in same planeC. Splanchnocranium help in encasing or jaws and gillsD. Mammals have monocondylic

Answer» Correct Answer - c