Innate immunity is characterized by:

  • A
    Production of antibodies against antigens.
  • B
    Providing resistance when a pathogen enters the body for the first time.
  • C
    Preventing the entry of foreign agents into the body.
  • D
    Creation of specific antigens against antibodies.

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Which of the following is not present in the structure of an antibody?

Explain Acquired immunity.

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What is the function of $T_S$ (Suppressor $T$-cells) in the body?

In which type of acquired immunity are ready-made antibodies introduced into the host body?

Match the columns:
Column-$I$ Column-$II$
$(a)$ Physical barrier $(1)$ Skin
$(b)$ Physiological barrier $(2)$ Interferon protein
$(c)$ Cellular barrier $(3)$ Leucocytes
$(d)$ Cytokine barrier $(4)$ Saliva in the mouth

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