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11. 12. 13. 16. 17. 18. 19. CLINICAL CHEMISTRY By Apollon et.al. CHAPTER 1 - Chemistry Questions Clinical Chemistry. Questions A volumetric pipette has an accuracy of: A. 1:10 B. 1:100 C.1:500 D. 1:1000 A pipette with a bulb Close to the delivery tip is used for viscous fluids and is called a; A. Mohr pipette C. Lewis-Dahn pipette B. Volumetric pipette D. Ostwald-Folin pipette The etched rings on the top of a pipette means’ A. The pipette should be allowed to drain anc the last drop should remain in the pipette B. The last drop is to be blown out after the pipettes drains C, The pipette is color coded D. The pipette is a volumetric pipette Standard solution from which 99.95% of the chemical can be retrieved are referred to as: A. Secondary standards C. Lyophilized standards B. Primary standards D. Preset standards When preparing solutions: A. A percent solution can be prepared from a volumetric solution 8. A volumteric solution can be prepared fron) a percent solution C. A triple beam balance and cylinder are necessary in ihe preparation of any type of solution D. Only an analytical balance.can be used in solution preparation — 4 solution in which the molecules of solute in solution are in equilibrium with excess undissolved molecules is referred to as: A. Dilute B. Concentrated Cc. Saturated D. Supersaturated Pure water has a pH of: A. 6.8 8.7.0 c.7.4 D. 9.0 A1x10N solution of Tmocea acid (HCI) has a oH of: AL 4 D.12 The statistical term that most PE pancaly describes nae precision is the: A. Mode 8. Mean C Median D. Coefficient of variation . Quality control should be used with all procedures to determine: A. Accuracy B. Reliability C. Piecision _D. Coefficient uf variation DELETED A procedure has a 2 SD variation from a mean value. How many valves from a normal population will the 2 SD include: A. 68.27% B. 84.76% C. 95.45% D. 99.73% Material with physical and chemical properties closely resembling the test specimen and containing concentrations of the substances being measured is known as: AS Control B, Standard C. Calibrator D. Reference solution . Optical density, according to Beer's law, is: A. Inversely proportional to the conceptration & Directly proportional to the concentration C. Proportional to the square of the concentration ‘ D, Proportional to the square root of the concentration * The dillerence between serum and plasma is that serum does not contain: A. Thrombin B. Fibrin C, Fibrinogen D. Calcium Two control sera are desirable for each general chemistry procedure. Which of these combinations would be appropriate? 4. Mean of normal range and abnormal (high) C. Low normal range and abnormal (low) 8B. High normal range and abnormal (high) D. Abnormal (low) and ebnornial (high) Sodium fluoride is used in specimen collection to: che A. Prevent glycolysis C. Chelate calcium y 8. Prevent conversion of prothrombin to thrombin D. Bind calcium: The concentration of oxalate recommended to be used as an anticoagulant, in mg/mL blood, is: A, 1-2 $ B. 2-4 Cc. 4-6 D.6-8 Etnylenediamine tetraacetic acid (EDTA) works as anticoagulant by: A. Chelating calcium 8. Preventing conversion of prothrombin to thrombin C. Forming an insoluble complex with calcium D. Binding magnesium 
