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مدافعت اور بیماریاں

7 سوالات: ایم ڈی کیٹ حیاتیات، جوابات اور وضاحت کے ساتھ۔

تمام سوالات جوابات کے ساتھ
  1. Antibodies are produced by:

    • 1 Plasma cells
    • 2 Red blood cells
    • 3 Platelets
    • 4 Neutrophils
    جواب دیکھیں

    درست جواب: Plasma cells

    When B lymphocytes are activated they become plasma cells, which make large amounts of antibody.

    غلطی کی اطلاع دیں

  2. Which blood group is the universal donor for red blood cells?

    • 1 AB positive
    • 2 O negative
    • 3 A negative
    • 4 B positive
    جواب دیکھیں

    درست جواب: O negative

    O negative red cells carry no A, B or Rh antigens, so they are unlikely to be attacked in the recipient.

    غلطی کی اطلاع دیں

  3. Rhesus incompatibility can cause problems in a pregnancy when:

    • 1 The mother is Rh positive and the fetus is Rh negative
    • 2 The mother is Rh negative and the fetus is Rh positive
    • 3 Both are Rh negative
    • 4 Both are Rh positive
    جواب دیکھیں

    درست جواب: The mother is Rh negative and the fetus is Rh positive

    An Rh negative mother can make antibodies against the Rh antigens of an Rh positive fetus.

    غلطی کی اطلاع دیں

  4. Which cells directly destroy virus-infected body cells?

    • 1 Cytotoxic T cells
    • 2 Plasma cells
    • 3 Mast cells
    • 4 Red blood cells
    جواب دیکھیں

    درست جواب: Cytotoxic T cells

    Cytotoxic T cells recognise infected cells and kill them.

    غلطی کی اطلاع دیں

  5. Which of these is an example of passive immunity?

    • 1 Immunity after having measles
    • 2 Immunity after a vaccine
    • 3 Antibodies passed from mother to baby through breast milk
    • 4 Immunity from a booster dose
    جواب دیکھیں

    درست جواب: Antibodies passed from mother to baby through breast milk

    In passive immunity the antibodies are received ready-made, so the baby makes no memory cells of its own.

    غلطی کی اطلاع دیں

  6. Malaria is caused by:

    • 1 A virus
    • 2 A bacterium
    • 3 Plasmodium, a protozoan
    • 4 A fungus
    جواب دیکھیں

    درست جواب: Plasmodium, a protozoan

    Plasmodium is spread by the bite of the female Anopheles mosquito.

    غلطی کی اطلاع دیں

  7. The dengue virus is spread by:

    • 1 Anopheles mosquito
    • 2 Aedes mosquito
    • 3 House fly
    • 4 Tsetse fly
    جواب دیکھیں

    درست جواب: Aedes mosquito

    Dengue is carried by Aedes mosquitoes, mainly Aedes aegypti.

    غلطی کی اطلاع دیں

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