Which of These Statements About Antigen-Antibody Interactions Is Correct

question 7

Multiple Choice

Which of these statements about antigen-antibody interactions is correct?

• A) The surface of red blood cells is covered with molecules called antigens.
• B) The surface of platelets are covered with molecules called antibodies.
• C) When antibodies bind to antigens, the result can be agglutination (clumping together) of cells.
• D) Blood groups are named for the antibodies normally present in that blood.
• E) Both the surface of red blood cells is covered with molecules called antigens and when antibodies bind to antigens, the result can be agglutination (clumping together) of cells are correct statements.

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Definitions:

Direct Labor-hours

The total number of work hours directly spent on manufacturing a product.

Materials Price Variance

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

Materials Quantity Variance

The variance between the actual and projected amounts of materials consumed in manufacturing, multiplied by the unit's standard cost.

Standard Cost

An estimated or pre-determined cost of manufacturing a product, which is used for budgeting and performance evaluation.