How many antigens can each antibody molecule | vedclass

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Question

(B) An antibody molecule has a $Y$-shaped structure consisting of four polypeptide chains: two heavy chains and two light chains.Each antibody molecul

Vedclass · Accepted Answer

$2$

Vedclass · Answer

(B) An antibody molecule has a $Y$-shaped structure consisting of four polypeptide chains: two heavy chains and two light chains.Each antibody molecule contains two antigen-binding sites located at the tips of the $Y$-shaped structure,known as the variable regions.Because there are two specific binding sites,each antibody molecule can bind to a maximum of two antigen molecules simultaneously.Therefore,the correct answer is $2$.

Column $I$ (Type of Immunity)	Column $II$ (Example)
$i$. Natural acquired active	$a$. $BCG$ Vaccine
$ii$. Artificial acquired active	$b$. Immunity against measles
$iii$. Natural acquired passive	$c$. Colostrum
$iv$. Artificial acquired passive	$d$. Injections against rabies

List-$I$	List-$II$
$(a)$ $IgG$	$(i)$ Protection of body surfaces
$(b)$ $IgA$	$(ii)$ Regulation of allergic reactions
$(c)$ $IgM$	$(iii)$ Activates $B$-cells
$(d)$ $IgD$	$(iv)$ Protection of body fluids
$(e)$ $IgE$	$(v)$ Protection of blood circulation

How many antigens can each antibody molecule bind to at most?

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