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NCERT Exemplar · Class 9 Science Tissues

55 questions · 55 still being checked

Multiple Choice Questions 11–20 (part 2 of 6)

  1. Exercise 11

    Select the incorrect sentence
    (a)
    Blood has matrix containing proteins, salts and hormones
    (b)
    Two bones are connected with ligament
    (c)
    Tendons are non-fibrous tissue and fragile
    (d)
    Cartilage is a form of connective tissue

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    NCERT’s answer
    (c)
    (c) — tendons are fibrous (bundles of collagen) and tough, not non-fibrous or fragile; they anchor muscle to bone under constant pulling force. The other three statements are correct.

  2. Exercise 12

    Cartilage is not found in
    (a)
    nose
    (b)
    ear
    (c)
    kidney
    (d)
    larynx

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    NCERT’s answer
    (c)
    (c) Kidney — the nose, ear and larynx are all shaped and supported by cartilage; the kidney is a soft excretory organ with no cartilage.Answer: (c) Kidney

  3. Exercise 13

    Fats are stored in human body as
    (a)
    cuboidal epithelium
    (b)
    adipose tissue
    (c)
    bones
    (d)
    cartilage

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    NCERT’s answer
    (b)
    (b) Adipose tissue.Loosely packed cells store large fat globules that fill most of the cytoplasm; cuboidal epithelium, bones and cartilage are structural and protective tissues, not fat depots.

  4. Exercise 14

    Bone matrix is rich in
    (a)
    fluoride and calcium
    (b)
    calcium and phosphorus
    (c)
    calcium and potassium
    (d)
    phosphorus and potassium

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    NCERT’s answer
    (b)
    (b) Calcium and phosphorus.The matrix is hardened by calcium phosphate crystals deposited within it, giving bone its rigidity; fluoride and potassium are not the matrix's defining minerals.

  5. Exercise 15

    Contractile proteins are found in
    (a)
    bones
    (b)
    blood
    (c)
    muscles
    (d)
    cartilage

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    (c)
    (c) Muscles.Actin and myosin filaments slide over each other to shorten the fibre, generating force; bone, blood and cartilage carry no such contractile filaments.

  6. Exercise 16

    Voluntary muscles are found in
    (a)
    alimentary canal
    (b)
    limbs
    (c)
    iris of the eye
    (d)
    bronchi of lungs

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    (b)
    (b) Limbs.Skeletal muscle attaches to bone and contracts under conscious control to move limbs; the alimentary canal, iris and bronchi are lined by smooth, involuntary muscle instead.

  7. Exercise 17

    Nervous tissue is not found in
    (a)
    brain
    (b)
    spinal cord
    (c)
    tendons
    (d)
    nerves

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    NCERT’s answer
    (c)
    (c) Tendons.Brain, spinal cord and nerves are all built of neurons; a tendon is dense connective tissue anchoring muscle to bone and carries no neurons.

  8. Exercise 18

    Nerve cell does not contain
    (a)
    axon
    (b)
    nerve endings
    (c)
    tendons
    (d)
    dendrites

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    (c)
    (c) Tendons.A neuron's own parts are its dendrites, cell body and axon, ending in nerve endings; a tendon is dense connective tissue joining muscle to bone, not part of a neuron.

  9. Exercise 19

    Which of the following helps in repair of tissue and fills up the space inside
    the organ?
    (a)
    Tendon
    (b)
    Adipose tissue
    (c)
    Areolar
    (d)
    Cartilage

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    NCERT’s answer
    (c)
    (c) Areolar.This loose connective tissue lies under the skin and around organs, nerves and vessels, filling gaps and helping repair damaged tissue; tendon, adipose and cartilage tissue serve other roles.

  10. Exercise 20

    The muscular tissue which function throughout the life continuously
    without fatigue is
    (a)
    skeletal muscle
    (b)
    cardiac muscle
    (c)
    smooth muscle
    (d)
    voluntary muscle

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    (b)
    (b) Cardiac muscle.\[\text{mitochondria + blood supply} \Rightarrow \text{steady aerobic ATP} \Rightarrow \text{no fatigue} \]It contracts rhythmically throughout life without tiring, unlike skeletal muscle, which fatigues with use.Answer: (b) Cardiac muscle