Antibodies defend the body from the invading | vedclass

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(A) Antibodies $(Ig)$ are specialized proteins produced by $B$-lymphocytes in response to pathogens. When an antibody encounters an antigen,it binds s

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Combining with it to abolish its free mobility and thus preventing it from acting in a damaging manner

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(A) Antibodies $(Ig)$ are specialized proteins produced by $B$-lymphocytes in response to pathogens. When an antibody encounters an antigen,it binds specifically to the antigen's epitope to form an antigen-antibody complex. This binding neutralizes the antigen by blocking its active sites,preventing it from attaching to host cells,and restricting its mobility,which effectively inhibits its ability to cause damage to the body.

List-$I$ (Barrier)	List-$II$ (Example)
$A$. Physical barrier	$i$. Skin
$B$. Physiological barrier	$ii$. Interferons
$C$. Cellular barrier	$iii$. Mucus coating
$D$. Cytokine barrier	$iv$. Saliva in mouth

Antibodies defend the body from the invading antigen by:

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