help, question on antibodies!

[splash.of.colour]

hey guys, sorry if this is posted in the wrong area... i was looking for a kind of question megathread but oh well

You know antibodies have two antigen-binding sites, does the shape of those two antigen binding sites have to be the same? or can they have a different shape on each arm?

because in the 2006 VCAA paper, multiple choice question 7, i thought the answer was C (which had two different shaped antigen binding sites), but it was actually B

thanks in advance!

[duquesne9995]

yup the two antibody binding sites are the same on the same antibody

[duhherro]

The two antigen binding sites have to be the same, but they can bind to two of the same antigen (1 per each arm)

[splash.of.colour]

ohh i see, well that clears that up! thanks for the super fast reply