Which statement about the specific immune response is FALSE?
A..Each T or B cell has antigen receptors for only one specific antigen.
B..T and B cells recognize antigens by using antibodies bound to their surface C..membranes. Unique antigen receptors are created by genetic recombination.
D..Antigens must be presented by an MHC molecule for T and B cells to recognize them.
E..All cells express MHC-I molecules, but only antigen-presenting cells express MHC-II molecules.

Explanation:We have learned in Chapter 2 that the body is defended by innate immune ... The antigen-recognition molecules of B cells are the immunoglobulins, or Ig. These ... Membrane-bound immunoglobulin on the B-cell surface serves as the cell's ... of antibody molecules allows each antibody to bind a different specific antigen, .

before it leaves the nucleus of a eukaryotic cell, mrna is altered in the following ways: - a cap is added to the 5' end of the mrna molecule; - a poly a tail is added to the 3' end; - introns are removed and exons are spliced together.