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Chemistry Certification

Instructions:

Answer 50 questions in 15 minutes.
If you are not ready to take this test, you can study here.
Match each statement with the correct term.
Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. The following bilirubin results are obtained on a patient: Day 1: 4.3 mg/dL Day 4: 2.2 mg/dL Day 2: 4.6 mg/dL Day 5: 4.4 mg/dL Day 3: 4.5 mg/dL Day 6: 4.5 mg/dL - Given that the controls were within range each day - what is a probable explanation for
90%
creatine kinase
specimen exposure to light
changes in the fuel

2. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
serum aliquots - one heated
pH = pKa + log (salt/acid)
respiratory ACIDOSIS
nephelometry

3. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
placenta
analyzed immediately
whole blood can be used
chemical ionization matrix

4. A patient has the following results: Patient Values : Reference Values: Serum iron 250 ug/dL 60-150 ug/dL TIBC 350 ug/dL 300-35O ug/dL The best conclusion is that this patient has...
thyroxine
hemolysis
iron hemochromatosis
bilirubindiglucuronide

5. In competitive inhibition of an enzyme reaction the...
cysteine
inhibitor binds to enzyme at same site as substrate
GFR
acute hepatitis

6. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
didymium filter
GGT
albumin
glass

7. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate
purulent
aldolase
20:1
sample exposed to light

8. The chemical composition of HDL- cholesterol corresponds to...
T4 by RIA
TSH
5 tri 15 cholesterol 50 protein
chloride

9. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
volumetric flask
draw blood for glucose and discontinue test
porphobilinigen SCREEN
creatinine clearance

10. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus
glucose tolerance test
200
ALP with fresh draw
testosterone

11. An Rf value of 0.5 in thin-layer chromatography means...
iron deficiency anemia
measure the total volume
Solute moves half the distance of the solvent front
pH = pKa + log (salt/acid)

12. Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful to assess blood concentrations of...
591
128
CML
lead

13. The relative migration rate of proteins on cellulose acetate is based on...
crigler
ionic charge
show a decrease in glycosylated hgb
g/MW

14. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
viral hepatitis
act as carriers for ions
lead
2Na + glucose over 20 + BUN over 3

15. A patient is admitted to the emergency room in a state of metabolic alkalosis.This would be consistent with this diagnosis?
enzyme immunoassay
high co2 and hco3
LDH
measurement of absorbance at 450

16. The T3 resin uptake test is a measure of...
binding capacity of thyroxine-binding globulin
monitoring the course of a known cancer
without a disease with a negative test result
potassium dichromate in SA

17. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
iron hemochromatosis
<1%
enzyme induction
200

18. The biuret reaction for the analysis of serum protein depends on the number...
atomic absorption
peptide bonds
5
glucose oxidase

19. The greatest activities of serum AST and ALT are seen in...
high co2 and hco3
acute hepatitis
analyzed immediately
improving state of metabolic control (as indicated by fructosamine)

20. The extent to which measurements agree with or approach the true value of the quantity being measured is referred to as...
dirty applicators
elevated lactic acid - elevated pyruvate
measure the total volume
accuracy

21. One international unit of enzyme activity is the amount of enzyme that - under specified reaction conditions of substrate concentration - pH - and temperature - causes utilization of substrate at the rate of...
1 micromole per minute
run a new set of controls
peroxidase-like activity of hemoglobin
CO2 and pH elevated

22. In electrophoretic analysis - buffers...
brain
iron deficiency anemia
act as carriers for ions
M subunit is inactivated

23. In monitoring glomerular function - this test has the highest sensitivity
boderline results test should be repeated
ceruplasmin
cancel test
creatinine clearance

24. The major fraction of organic iodine in the circulation is in the form of...
endosmosis
2Na + glucose over 20 + BUN over 3
thyroxine
high co2 and hco3

25. A new method is being evaluated. A recovery experiment is performed with the following results: 0.9 mL serum sample + 0.1 mL H20 = 89 mEq/L 0.9 mL serum sample + 0.1 mL analyte std. @ 800 mEq/L = 161 mEq/L The percent recovery of the added analyt
90%
respiratory ACIDOSIS
decreased lecithin
manic-depression

26. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
MI
T4 by RIA
1 mol/kg
no decrease in serum growth hormone after 90 minutes

27. A pH of 7.0 represents a H+ concentration of...
100 nmol
3500
adding an acid stabilizer
urinary free cortisol

28. Specimens for blood gas determination should be drawn into a syringe containing...
low pH
BUN increased
heparin
viral hepatitis

29. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
decreased lecithin
biuret
200
hemolysis

30. The nanometer is a measurement of...
wavelength
plasma bicarbonate
patient noncompliance
methadone

31. This diseases results from a familial absence of high-density lioprotein
200
100 nmol
Tangier
iron hemochromatosis

32. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...
O2
occult blood
sharp fibrinogen peak
wavelength

33. Most chemical methods for determining total protein utilize this reaction?
obstructive jaundice
chylomicrons
Tay-sachs
biuret

34. A blood sample was received from the emergency room with a request for narcotic analysis. The request slip indicated that the patient (a known heroin addict) responded to naloxone administration. The serum was negative for morphine by EIA. What other
methadone
sharp cutoff filter
ratio of distance moved by solvent to distance moved by compound
A1

35. The following blood gas results were obtained: pH : 7.18 PO2: 86 mm Hg PCO2: 60 mm Hg O2 saturation: 92% HCO3-: 21 mEq/L TCO2: 23 mEq/L Base excess: -8.0 mEq/L The patient's results are compatible with...
heparin
Solute moves half the distance of the solvent front
porphobilinigen SCREEN
emphysema

36. Ninety percent of the copper present in plasma is bound to...
phenytoin
120 minutes
ceruplasmin
BUN increased

37. A patient with hemolytic anemia will...
bone
inclusion of smokers and nonsmokers in the study population
turn off
show a decrease in glycosylated hgb

38. The anion gap is useful for quality control of laboratory results for...
sodium potassium chloride CO2
volumetric flask
catalyze redox reactions
multiplied by 4

39. The formula for calculating absorbance given the percent transmittance (%T) of a solution
agarose
2-log(T)
TSH
inclusion of smokers and nonsmokers in the study population

40. Technical problems encountered during the collection of an amniotic fluid specimen caused doubt as to whether the specimen was amniotic in origin. This procedure would establish that the fluid is amniotic in origin
T4 by RIA
creatinine
boderline results test should be repeated
is quantitated by the amount of light produced

41. In the atomic absorption method for calcium - lanthanum is used...
prevent phosphate interference
normal - liver breakdown
dirty electrodes
run a new set of controls

42. In the liver - bilirubin is converted to...
lead
hemolysis
bilirubindiglucuronide
freezing point

43. The following results were obtained in a creatinine clearance evaluation: Urine concentration 84 mg/dL Urine volume 1440 mL/24 hr Serum concentration 1.4 mg/dL Body surface area 1.60 m2 (average = 1.73 m2) The creatinine cle~trance in mL/min is...
<45
C
65
1:5

44. The serum glucose concentration of a diabetic patient undergoing a 2-hour glucose tolerance test should return to the baseline (fasting level) after a minimum of...
electric current
can be separated into distinct phenotypes
120 minutes
100nmol

45. Serum haptoglobin...
<1%
ionization of carboxyl groups (yielding a net negative charge)
didymium filter
can be separated into distinct phenotypes

46. Spectrophotometers isolate a narrow band pass by means of...
prisms and grating
analyzed immediately
agarose
specificity

47. In a double-beam photometer - the additional beam is used to...
correct for variations in light intensity
thiamine
1:5
digoxin

48. These enzymes of heme biosynthesis are inhibited by lead
bone
C
placenta
porphobilinogen synthetase

49. A technician is asked by the supervisor to prepare a standard solution from the stock standard. What is the glassware of choice for this solution?
creatine kinase
valine leucine isoleucine
volumetric flask
hyperventilation

50. A person suspected of having metabolic alkalosis would have these laboratory findings
CO2 and pH elevated
manic-depression
urinary free cortisol
porphobilinogen screen