question_answer 33)

  Antibodies present in colostrum which protect the new born from certain diseases is of (a) IgG type                        (b) IgA type                        (c) IgD type                         (d) IgE type

Answer:

                  (b) The yellowish fluid colostrum is secreted by mother during the initial days of lactation has abundant antibodies (IgA) to protect the infant from several diseases. IgG immunoglobulin (antibody) is most abundant (appro .80%) antibody in human and found in serum IgA is second abundant (approx .10-15%) antibody. It is found in saliva and tear also. IgD and IgE constitute 2-3% of total antibodies which are found in most cells and serum.