Hey. I need some help on these couple of t/f questions. Im supposed to explain m
ID: 21825 • Letter: H
Question
Hey. I need some help on these couple of t/f questions. Im supposed to explain my answer weather true or false. thanks for any help or clarification....- a large complex protein antigen generally can activate more b-cells than a smaller protein
-all antibodies have the same heavy chain constant regions.
-The clonal selection hypothesis asserts that lymphocyte specificity is determined prior to contact with antigen and provides a framework for understanding specificity and memppory of adaptive immune responses.
Explanation / Answer
true Polyclonal antibodies (or antisera) are antibodies that are obtained from different B cell resources. They are a combination of immunoglobulin molecules secreted against a specific antigen, each identifying a different epitope. false Antibodies are glycoproteins belonging to the immunoglobulin superfamily; the terms antibody and immunoglobulin are often used interchangeably. Antibodies are typically made of basic structural units—each with two large heavy chains and two small light chains. There are several different types of antibody heavy chains, and several different kinds of antibodies, which are grouped into different isotypes based on which heavy chain they possess. Five different antibody isotypes are known in mammals, which perform different roles, and help direct the appropriate immune response for each different type of foreign object they encounter. true The clonal selection hypothesis has become a widely accepted model for how the immune system responds to infection and how certain types of B and T lymphocytes are selected for destruction of specific antigens invading the body.