A Set of Mice Are Each Immunized with One of the Following

question 27

Multiple Choice

A set of mice are each immunized with one of the following as shown in Figure.
Mouse A is immunized with tetanus toxoid protein. Mouse B is immunized with the Haemophilus influenzae type b polysaccharide antigen. Mouse C is immunized with a conjugate of the diphtheria toxoid protein linked to H. influenzae type b polysaccharide. Mouse D is left unimmunized (naive) . Four weeks later the spleen cells from each mouse are isolated, and B lymphocytes and T lymphocytes from each spleen cell population are purified. When mixed together in culture together with a conjugate antigen of the tetanus toxoid protein linked to the to H. influenzae type b polysaccharide, which combination of spleen cells would generate a memory B cell response?

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Definitions:

Direct Materials Purchases Variance

The difference between the actual cost of direct materials purchased and the expected cost of direct materials, based on standard cost.

Standard Direct Labor-Hours

The predetermined amount of labor time estimated or expected to produce a unit of output, used for budgeting and measuring efficiency.

Labor Rate Variance

The difference between the actual cost of labor and the budgeted or standard cost of labor.

Direct Materials Purchases Variance

Direct materials purchases variance analyzes the difference between the actual cost of materials purchased and the budgeted cost, impacting budgeting and cost control.