Discussion
Proteins of plant origin (obtained from seed extracts) which behaves like antibody commonly termed as :
Answer: B
Plant proteins from seed extracts that behave like antibodies are called lectins.
Lectins bind specific sugars on cell surfaces and can agglutinate red cells of particular blood groups, much as antibodies do. Examples are anti-H from Ulex europaeus and anti-A1 from Dolichos biflorus, both used in serology.
Agglutinogens are the antigens on red cells, not the reagents that react with them. Antisera are antibody-containing sera from animals or people, and plasma proteins come from blood, not from plants.
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