Blood Typing Quiz

What is the purpose of using physiological saline in the preparation of red cell suspension?

• To preserve the red cells for a longer period

• To dilute the red cells to the desired concentration

• To maintain the pH balance

• To increase the concentration of red cells

In forward typing, how many drops of each antisera are added to the tubes?

• Four drops

• Three drops

• One drop

• Two drops

What is the role of reagent red cells in reverse typing?

• To act as a control

• To react with patient plasma

• To determine the blood type

• To increase the reaction speed

What indicates a positive reaction in the anti-D test?

• A four plus cell button agglutination

• A two plus cell button agglutination

• A clear solution

• No change in the cell button

How is the blood type determined from the forward and reverse typing results?

• By the speed of the reaction

• By the presence of a cell button

• By the color change in the solution

• By the pattern of agglutination observed