An accident victim receives a blood transfusion. Shortly thereafter, he begins to have difficulty breathing, develops a fever, and experiences nausea and vomiting. Which of the following is the most likely interpretation of these events?
A) The blood transfusion was mismatched.
B) The blood transfusion contained pyrogens.
C) The recipient had previously been exposed to foreign blood group antigens.
D) The blood transfusion was mismatched and contained pyrogens.
E) The blood transfusion was mismatched and the recipient had previously been exposed to the foreign blood group antigens.
E
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Which of the following can be used to help classify actinomycetes?
A. Percent G + C content B. Phospholipid composition of the membrane C. Cell wall composition D. All of these can be used to classify actinomycetes.
Which of the following statements about endosymbiosis is FALSE?
a. endosymbiosis has taken place many times among true, multicellular animals b. genes from organelles that originated through endosymbiosis are largely transferred to the host cell nucleus c. The genes that code for ribosomes in mitochondria and chloroplasts are more like those in prokaryotes than in eukaryotes d. mitochondria and chloroplasts divide on their own through binary fission e. endoysymbiosis occurred many times in unicellular animals
Cellulose is
a. a polysaccharide found in cell walls. b. a component of cell membranes. c. an oligosaccharide. d. formed by hydrolysis of monosaccharides. e. a component of invertebrate exoskeletons.
The stains for spirochetes are argyrophil techniques
a. true b. false