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The antibody which can cross placental barrier is

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Important Questions on Human Health and Disease

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The most abundant class of immunoglobulins (lgs) in the body is
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A protein or polysaccharide molecule that stimulates antibody formation:
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Following are the differences between innate immunity and acquired immunity.
  Innate immunity Acquired immunity
(i) It is inherited by an organism from the parents and protects it from birth throughout life. It is acquired by an organism after birth.
(ii) It is also called as specific immunity. It is also called as non-specific immunity.
(iii) It consists of different types of barriers that prevent the entry of foreign agents. It consists of specialised cells ( T -cells and B -cells) and antibodies that circulate in the body fluid.

Select the option with correct pair of differences,
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Select the correct statements regarding the characteristics of acquired immunity.
(i) Cell-mediated immunity is responsible for acquired immunity.
(ii) It produces a primary response of low intensity.
(iii) Active and passive immunity are types of acquired immunity.
(iv) Polymorphonuclear leucocytes and natural killer cells are involved in acquired immunity.
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Read the given statements carefully.
(i) Innate immunity is a specific type of defence, that is present at the time of birth.
(ii) Malignant malaria is caused by Plasmodium falciparum .
(iii) Malaria could be confirmed by Widal test.
(iv) Active immunity is slow and takes time to give its full effective response.
(v) Saliva in the mouth acts as physiological barrier for pathogens.
Which of the above statements are correct?
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Which one of the following immune system components does not correctly match with its respective role?