An ELISA for Hepatitis C has 95 percent sensitivity and 90 percent specificity. This means that the test
A) detects 95 percent of the true positive samples and has 10 percent false positive results.
B) detects 5 percent of the true positive samples and has 90 percent false positive results.
C) detects 90 percent of the true positive samples and has 5 percent false positive results.
D) detects 95 percent of the true positive samples and has 90 percent false positive results.
E) detects 5 percent of the true positive samples and has 10 percent false positive results.
A
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One of the buffers that contribute to pH stability in human blood is carbonic acid (H2CO3). Carbonic acid is a weak acid that, when placed in an aqueous solution, dissociates into a bicarbonate ion (HCO3-) and a hydrogen ion (H+), as noted below
If the pH of blood increases, one would expect _____. A) a decrease in the concentration of H2CO3 and an increase in the concentration of HCO3- B) an increase in the concentration of H2CO3 and a decrease in the concentration of HCO3- C) a decrease in the concentration of HCO3- and an increase in the concentration of H+ D) an increase in the concentration of HCO3- and a decrease in the concentration of OH- E) a decrease in the concentration of HCO3- and an increase in the concentration of H2CO3 and H+
Some of the functions of the eukaryotic organelles are performed in bacteria by the:
A. plasma membrane. B. capsule. C. cell wall. D. nucleoid area. E. flagella/cilia.
Which of the following does not represent the correct pairing of the three-letter abbreviation with the one-letter abbreviation of an amino acid?
A) pro-P B) met-M C) glu-E D) phe-F E) arg-A
The cell type with the most mitochondria is
A) muscle. B) nerve. C) fat. D) sperm.