CBSE Questions for Class 11 Medical Biology Locomotion And Movement Quiz 7 - MCQExams.com

Consider the following statements:
$$1$$. The element found in bone and teeth is calcium and phosphorus.
$$2$$. Bones join with muscles with the help of tendons.
$$3$$. Bone of man became weak in old age due to deficiency of calcium.
Which of the statement(s) given is/are correct?
  • $$1, 2$$ and $$3$$
  • $$2$$ and $$3$$
  • $$1$$ and $$2$$
  • Only $$1$$
Consider the following statements:
$$1$$. Calcium phosphate is found in bones is largest in amount.
$$2$$. Longest bone is found in thigh region of human body.
$$3$$. Longest bone found in man is Femur.
Which of the statement(s) given is/are true about bone?
  • Only $$1$$
  • Only $$2$$
  • $$1, 2$$ and $$3$$
  • None of these
Total number of bones found in humans is _____.
  • $$212$$
  • $$206$$
  • $$202$$
  • $$200$$
Consider the following statements:
$$1$$. Femur is the longest bone in human body.
$$2$$. Stapes is the smallest bone found in ear.
$$3$$. Stapedius is the smallest muscle in our body.
$$4$$. Turbinal bones can be traced in forelimbs.
Which of the statements given are correct?
  • $$3$$ and $$4$$
  • $$1, 2$$ and $$4$$
  • $$2$$ and $$3$$
  • All of these
Number of bones found in skull is ______.
  • $$8$$
  • $$30$$
  • $$32$$
  • $$34$$
Which of the following indicates tetany?
  • Spasm
  • Muscular cramps
  • Tremors
  • All of the above
Pairs of ribs found in man are _______.
  • $$12$$
  • $$10$$
  • $$14$$
  • $$11$$
Study the following statements:
$$1$$. Study of bones is called Osteology.
$$2$$. Process of bone formation is known as Ossification.
$$3$$. Sesamoid bones are formed by ossification in tendons.
Which of the statements given are correct about bones?
  • $$1, 2$$ and $$3$$
  • $$2$$ and $$3$$
  • $$1$$ and $$3$$
  • $$1$$ and $$2$$
In Myasthenia gravis, acetylcholine __________________.
  • Receptors on motor end plate are reduced
  • Secretion from nerve terminals is reduced
  • Esterase activity is inhibited
  • Secretion from nerve terminals is enhanced
How many teeth in man come out twice?
  • $$4$$
  • $$12$$
  • $$20$$
  • $$28$$
Study the following statements:
$$1$$. Tendons connect bone to muscles.
$$2$$. Bone forming cells are osteoblasts.
$$3$$. Ligament connect bone to bone.
Which of the statements given are correct?
  • $$1$$ and $$2$$
  • $$2$$ and $$3$$
  • $$1, 2$$ and $$3$$
  • None of these
Bones of old persons are brittle and fractured more readily occur because they contain more _________.
  • lacunae
  • organic matter
  • inorganic matter
  • bone marrow
Neutrophils and lymphocytes originate from __________.
  • Kidney tubule
  • spleen
  • bone marrow
  • lymph node
Statement I : Microtubules are formed only in animal cells.
Statement II : Microtubules are made up of a protein called myosin.
Choose the correct option.
  • Statement I is correct and statement II is incorrect.
  • Statement II is correct and statement I is incorrect.
  • Both statements are correct.
  • Both statements are incorrect.
Which one of the following carries out the function in human being similar to the one which Malpighian tubules perform in cookroach and other insects ?
  • Lung
  • Kidneys
  • Heart
  • Reproductive organs
Consider the following statements:
$$1$$. Humerus is found in human leg.
$$2$$. Smallest bone of human body is Stapes.
Which of the statement(s) given is/are correct?
  • Only $$1$$
  • Only $$2$$
  • $$1$$ and $$2$$
  • None of these
The linear protein that has catalytic function is _____________.
  • actin
  • collaagen
  • mysoin
  • trypsin
Which of the following are the reasons(s) for rheumatoid arthritis? Choose the correct option
(i) Lymphocytes become more active
(ii) Body attacks self cells
(iii) More antibodies are produced in the body
(iv) The ability to differentiate pathogens or foreign molecules from self cells is lost
  • (i) and (ii) 
  • (ii) and (iv) 
  • (iii) and (iv)
  • (i) and (iii)
The proteins found in the filaments of muscle fibres are
  • Actin and myosin
  • Myosin and elastin
  • Actin only
  • Myelin and tubulin
During strenuous muscular activity, hydrogens removed from sugar molecules are accepted temporarily by .......... to form..........        
  • oxygen; water
  • pyruvate; lactic acid
  • myoglobin; carbaminohaemoglobin
  • oxygen; carbon dioxide
The functional unit of myofibril is made up of?
  • Complete A-band
  • Complete I-band
  • Complete I-band and two half A-band
  • Complete A-band and two half I-band
The joint between the human skull bones is
  • Hinge joint
  • Immovable joint
  • Cartilaginous joint
  • Synovial joint
State whether the following statements are true or false.
Actin is actually a globular protein that assembles as a long beady structure consisting of two helical chains.
  • True
  • False
In a muscle fibre
  • Sacrolemma is connective tissue holding the myofibrils together
  • T system contains calcium storage sacs
  • Both filaments have cross-bridges
  • All of the above
The microfilaments of a muscle
  • Are arranged in compartments known as sarcomeres
  • Are composed of proteins known as actin and myosin
  • Are the actual contractile elements of the fibre
  • All of the above
Actin binding sites are located on:
  • troponin
  • tropomyosin
  • meromyosin
  • both (b) and (c)
The given figure shows actin (thin) filament. Identify the labeled parts A, B, and C. 

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  • A - Tropomyosin, B - Troponin, and C - F-actin
  • A - Troponin, B - Myosin, and C - Tropomyosin
  • A - Troponin, B - Tropomyosin, and C - Myosin
  • A - Troponin, B - Tropomyosin, and C - F-actin
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 - 1F, B - tropomyosin, C - troponin
  • A - 2F,  B - troponin, C - tropomyosin
  • A - F, B - tropomyosin, C - troponin
Select the correct statement regarding the specific disorder of muscular or skeletal system.
  • Muscular dystrophy - age related shortening of muscles
  • Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age
  • Myasthenia gravis - Autoimmune disorder which inhibits sliding of myosin filaments
  • Gout - Inflammation of joints due to extra deposition of calcium.
The 'thick' filament in muscles is a polymerised protein of
  • meromyosins
  • actins
  • troponins
  • tropomyosins.
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