Which of the following findings is a diagnostic criterion for monoclonal gammopathy of undetermined significance?
A. Serum monoclonal protein greater than 3 g/dL
B. Plasma cell count lower than 10% of total cells in bone marrow
C. Increased calcium in the blood
D. Presence of CRAB features
Answer: B. Plasma cell count lower than 10% of total cells in bone marrow
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A sequence of amino acids found in a subunit of the ATP synthase enzyme in several species is shown below. Which amino acids are likely to be most important to the function of ATP synthase?
A) Those that are shaded dark blue because the amino acids are identical between species.
B) Those that are shaded light blue because the amino acids are similar, but not identical.
C) Those that are not shaded because the amino acid sequences are different between species.
D) Comparing sequence between species does not indicate which amino acids are important to function.
How are the biceps and triceps attached to the arm so that they can act in opposition?
A. The biceps are attached by tendons and the triceps by ligaments. B. Both are attached by tendons. C. The biceps are attached by ligaments and the triceps by tendons. D. Both are attached by ligaments. E. Both are attached by cartilage.
Figure 6.5B
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Questions 12-14 refer to the figure above illustrating the results from Engelmann's investigation.
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According to the figure, the most effective wavelength for photosynthesis is revealed by algae exposed to ____ nanometers.
A. 680 B. 700 C. 400 D. 425 E. 550
The PAS stain differs from the Gridley technique in the:
a) use of Schiff reagent b) component demonstrated c) oxidizer used d) sections required