PATHOLOGY MCQ
IMMUNE RESPONSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Specific binding sites on antibodies join with specific markers on antigens
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Antibodies ignore ‘good’ cells and attack ‘bad’ ones
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Antibodies destroy all the cells they come in contact with
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Both 1 and 2
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Detailed explanation-1: -How do antibodies fight off antigens? The molecules on the surfaces of antigens differ from those found naturally in your body. So, when an antigen enters your body, your immune system recognizes it right away. In order to attack this antigen invader, your immune system calls out for antibody protection.
Detailed explanation-2: -Antibodies attach to a specific antigen and make it easier for the immune cells to destroy the antigen. T lymphocytes attack antigens directly and help control the immune response. They also release chemicals, known as cytokines, which control the entire immune response.
Detailed explanation-3: -Unlike a conventional antibody (left), a two-in-one antibody (right) can adapt to bind two different antigens. Unlike a conventional antibody (left), a two-in-one antibody (right) can adapt to bind two different antigens. THE TWO BINDING SITES of most antibodies can bind only one type of antigen.
Detailed explanation-4: -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. Electrostatic interactions, hydrogen bonds, van der Waals forces, and hydrophobic interactions can all contribute to binding.
Detailed explanation-5: -Antibodies. Antibodies help the body to fight microbes or the toxins (poisons) they produce. They do this by recognising substances called antigens on the surface of the microbe, or in the chemicals they produce, which mark the microbe or toxin as being foreign. The antibodies then mark these antigens for destruction.