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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$A$ boy happens to put his foot on a rusted nail and the doctor gives him an injection. Most likely,what has the doctor administered?

Antibodies are produced by

An antibody is:

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

Match the following columns:
Column-$I$ Column-$II$
$(A)$ Physical barriers $(1)$ Interferon
$(B)$ Physiological barriers $(2)$ Leukocytes
$(C)$ Cellular barriers $(3)$ Tears
$(D)$ Cytokine barriers $(4)$ Skin

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