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Antibodies : Structure and Classification MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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Antibodies is considered one of the most asked concept.
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17 Questions around this concept.
Solve by difficulty
If you suspect a major deficiency of antibodies in a person, to which of the following would you look for confirmatory evidence?
Read the following four statements (A-D):
(A) Colostrum is recommended for the newborn because it is rich in antigens.
(B) Chikungunya is caused by a gram-negative bacterium.
(C) Tissue culture has proved useful in obtaining virus-free plants.
(D) Beer is manufactured by distillation of fermented grape juice.
How many of the above statements are wrong?
Which one of the following is used to treat cancers?
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Concepts Covered - 0
Antibodies
- Antibodies are glycoproteins formed in response to antigenic stimulation and counteract with antigens with great specificity.
- The antibodies are found in the serum fraction of the blood and are also known as immunoglobulins (Ig).
- Each antibody molecule has four peptide chains, two small called light chains and two longer called heavy chains.
- Hence, an antibody is represented as H2L2.
- Each light-chain contains a single variable-domain and a single constant-domain.
- Each heavy-chain contains a singly variable-domain and three, sometimes, four constant-domains.
- Variable (V) regions of both the chains lie opposite to each other at the top of the two arms of the antibody molecule and represent the site where the antigen-antibody-binding takes place.
- According to their physicochemical properties, the immunoglobulins are subdivided into five different classes, namely, IgG, IgA, IgM, IgD, and IgE.
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