MEDICINE MCQ
INFECTIOUS DISEASES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The shape of the antibody is the same as the shape of the antigen on the pathogen
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The shape of the antibody is complementary to the shape of the antigen on the pathogen
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Antibodies cause a primary immune response
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Antibodies cause a secondary immune response
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Detailed explanation-1: -Antibodies work by recognising and sticking to specific proteins, such as those found on the surfaces of viruses and bacteria, in a highly specific way. When the body encounters a microbe for the first time, immune cells produce antibodies that specifically recognise proteins associated with that particular microbe.
Detailed explanation-2: -Antibodies have a complementary shape to a specific antigen they attack. Since one antibody attaches to one specific antigen, they can be said to be complementary. This statement is true. Antigens and antibodies have the same shape.
Detailed explanation-3: -With protein antigens, the antibody molecule contacts the antigen over a broad area of its surface that is complementary to the surface recognized on the antigen.
Detailed explanation-4: -2. Antibodies work through a principle known as shape complementarity. Just as a key only works if its shape conforms to the shape of the tumblers inside a lock, an antibody can only bind well to an antigen with a complementary shape.