A crime scene investigator found that a biological fluid sample contains a large amount of IgA-type antibody. This fluid is probably
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A crime scene investigator found that a biological fluid sample contains a large amount of IgA-type antibody. This fluid is probably serum. All of the above have an equal probability of being IgA: lymph, saliva, blood. Microbiology, select the best answer.
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At 1:00 a.m., someone breaks a window in the back of a store and robs the safe. On the way out, the thief is cut on a piece of broken glass. A forensic team collects and tests a sample of blood left behind by the thief. It is O-. The police bring in a suspect with a cut forearm who was arrested just three blocks from the store. The person resembles someone seen leaving the store at the time of the robbery. A sample of the suspect's blood is taken and tested for blood type. Once the suspect's blood is mixed with anti-A serum, it is immediately clear that the suspect is not the person who was cut on the broken glass in the store. How did the test indicate that fact?
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