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प्रश्न
Describe the antigen-antibody complex
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उत्तर
a. Antibodies are always antigen specific. Combining sites of antigen, called antigenic determinants or epitopes react with corresponding antigen binding sites of antibodies called paratopes.
b. Specificity of an antibody for an antigen lies in its sequence of amino acids within variable regions of two chains. These are active sites of antibody where the molecules bind to specific antigens.
c. Both the arms have same amino acid sequence and therefore bind the same kind of antigen.
d. Thus each antibody can join two antigen like Lock and Key manner called antigen − antibody complex.
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संबंधित प्रश्न
Write a note on ‘artificial acquired active immunity’.
Highlight the role of thymus as a lymphoid organ.
Write a note on erythrocytes.
Describe the structure of an antibody.
STRUCTURE OF ANTIBODY
Enlist any two features of Acquired immunity.
Explain the various types of acquired immunity.
Which type of immunity is acquired due to infection?
The epithelial barrier of the innate immune system is ____________.
All are forms of vaccines, EXCEPT ______.
Match column I with column II and choose the correct option.
| Column I | Column II | ||
| i. | Specificity | a. | Lymphocytes produced against each particular foreign molecule |
| ii. | Diversity | b. | Self-cells are not attacked by immune system of the own body |
| iii. | Memory | c. | Immune system works against multiple pathogens |
| iv. | Discrimination between self and non-self | d. | Stronger immune response on second encounter |
