SCIENCE
CIRCULATORY SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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They are capable of stimulating the formation of haemoglobin in the blood
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They destroy haemoglobin
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They are capable of defending themselves against attack by anti bodies
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They are capable of stimulating the formation of antibodies
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Detailed explanation-1: -Properties of Antigen-Antibody Reaction Affinity: This refers to how strongly an antigen binds to a certain antigen-binding site on an antibody. Avidity: It is a more general concept than affinity. It represents the Ag-Ab complex’s total strength.
Detailed explanation-2: -Characteristics of a Good Antigen Large stretches which are not composed of long repeating units. A molecular weight of at least 8 000 to 10 000 Da (however, it must be noted that haptens of only 200 Da molecular weight have been conjugated with a carrier protein) Can undergo processing by the immune system.
Detailed explanation-3: -An antigen that induces an immune response-i.e., stimulates the lymphocytes to produce antibody or to attack the antigen directly-is called an immunogen.
Detailed explanation-4: -Antigens generally have high molecular weight and are commonly proteins or polysaccharides. Polypeptides, lipids, nuclear acids, and many other materials can also function as antigens. Haptens are smaller substances that can also generate immune responses if chemically coupled to a larger carrier protein.