The following results were obtained in a standard two-fold serial dilution of an agglutination technique for antibody detection: Tubes 1 through 5 no agglutination, Tubes 6,7, and 8 showed agglutination, Tube 9 and 10 no agglutination. What do the results in tubes 1 through 5 represent?

Each of the following cells express a TCR except:

The precursor cells to both the CD4+ and CD8+ T cells in the thymus are:

One of the abilities of a natural killer cell is to:

Which of the following complement components functions in cascade amplification?

Which of the following statements is correct regarding the size of he precipitin ring in a radial immunodiffusion technique, where antigen is allowed to diffuse through an agarose gel containing its corresponding antibody?

Which of the following tests is classified as an unlabeled precipitation assay?

In an enzyme immunoassay, an on board (included internal) control produces a colored line in the reaction window in an area labeled “C” for control.  If both the patient sample and the colored line are not present, the laboratory professional should:

This term is used to describe an antigen with more than one specific epitope:

Which of the following complement proteins is a component of the classical complement pathway?