Blood Testing Techniques and Results

The video tutorial explains various methods to test and identify blood samples. It begins with a chemical test using benzene and penal methylene solutions to confirm the presence of blood. A microscopic test follows to determine the origin of the blood, whether it is from mammals, birds, fish, or reptiles. The precipitate test is then used to distinguish between human and animal blood. Finally, the blood group is identified using anti-serum A, B, and D, concluding with the determination of an AB positive blood type.

What color indicates a positive blood sample when benzene solution is used?

• Intense blue

• Green

• Yellow

• Red

What does a rose or deep pink color signify in the blood test?

• Inconclusive result

• Contaminated sample

• Positive blood sample

• Negative blood sample

What type of blood cells are identified as large, oval, and nucleated?

• Mammalian

• Avian, fish, or reptilian

• Insect

• Bacterial

What is the purpose of using a 0.9 percent salt solution in the microscopic test?

• To change the color of the blood

• To dissolve the blood

• To prevent evaporation

• To stain the blood

What is required to perform the precipitate test for human blood?

• Benzene solution

• Human anti-serum

• Salt solution

• Methylene blue

What indicates a positive result for human blood in the precipitate test?

• A green tint

• A white cloudy line

• A red line

• A blue spot

How long should the sample stand in the precipitate test if the blood is on cloth?

• Five minutes

• Overnight

• Two hours

• One hour

Which anti-serum is used to identify blood group A?

• Anti-serum C

• Anti-serum D

• Anti-serum A

• Anti-serum B

What does clumping in A, B, and Rh indicate about the blood group?

• B negative

• O negative

• AB positive

• A positive

Which component is used to test for the Rh factor in blood?

• Anti-serum A

• Anti-serum B

• Anti-serum D

• Anti-serum C