Question 25 • Introduction to Health Science - EL3601 B
A burglar breaks into a store through a window and sets off the alarm. A raccoon injures his foot on the glass and leaves some blood on the sidewalk. When the police get there, they collect the sample and decide to analyze the blood to see if it comes from the burglar. During the test, rabbit antibodies are mixed with the blood. What is most likely to be the outcome of this test?
Answer
A
The blood will clot, and the police will have evidence against the burglar.
B
The blood will clot, and the police will determine it is human.
C
The blood will not clot, and the police will have evidence against the burglar.
D
The blood will not clot, and the police will determine it is not human.
Explanation
Rabbit antibodies used in a blood test react with human blood proteins, producing visible clumping or clotting when the sample is human. The sample here is from a raccoon, so it is not expected to react with the rabbit antibodies and will not clot. Therefore, the test indicates that the blood is not human, rather than providing evidence against the burglar.
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