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Chemistry Certification
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Study First
Subject
:
certifications
Instructions:
Answer 50 questions in 15 minutes.
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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 biuret reaction for the analysis of serum protein depends on the number...
analyzed immediately
D
elevated lactic acid - elevated pyruvate
peptide bonds
2. When the exact concentration of the solute of a solution is known and is used to evaluate the concentration of an unknown solution - the known solution is...
standard
pCO2
parathyroid hormone
methyl alcohol
3. The most widely used support medium for electrophoretic separation of lipoproteins is...
WITHOUT a disease with a negative test
agarose
1 micromole per minute
HPLC analysis of porpobilinogen on 24hr urine
4. The identification of Bence Jones protein is best accomplished by...
NADH
immunofixation
40-50
iron hemochromatosis
5. Most chemical methods for determining total protein utilize this reaction?
biuret
normal - liver breakdown
triglycerides
acute hepatitis
6. Measurement of the serum acid phosphatase is used to detect neoplastic disease of the...
one micromole/minute
GFR
prostate
freezing point
7. The nanometer is a measurement of...
ratio of distance moved by solvent to distance moved by compound
Wilson's disease
emphysema
wavelength
8. The biologically most active - naturally occuring androgen is...
glucose
D
chloride
testosterone
9. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
1 micromole per minute
nondiagnostic for MS
acute hepatitis
HPLC analysis of porpobilinogen on 24hr urine
10. An electrode has a silver/silver chloride anode and a platinum wire cathode. It is suspended in KCl solution and separated from the blood to be analyzed by a selectively permeable membrane. Such an electrode is used to measure...
Wilson's disease
iron deficiency anemia
elevated lactic acid - elevated pyruvate
O2
11. Diagnostic specificity is defined as the percentage of individuals...
without a disease with a negative test result
increased vasoconstriction
alkaline picrate
increased O2 decreased HCO3
12. This serum protein migrates with the beta-globulins on cellulose acetate at pH 8.6...
manic-depression
C3 complement
5
HDL
13. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances
parathyroid
atomic absorption
@ 100
65
14. A low concentrarion of serum phosphorus is commonly found in...
thiamine
primary hyperparathyroidism
carbohydrate hyperalimentation
diet
15. The following data were obtained from a cellulose acetate protein electrophoresis scan: Albumin area 75 units Gamma globulin area 30 units Total area 180 units Total protein 6.5 g/dL The gamma globulin content in g/dL is...
glycerol
chemical ionization matrix
crigler
1.1
16. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
sharp fibrinogen peak
maintain colloidal osmotic pressure
WITHOUT a disease with a negative test
trig
17. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
ratio of distance moved by solvent to distance moved by compound
quantitation of label
albumin
crigler
18. The method of choice for diagnosis of a protracted attack of porphyria is...
lower than in adults
HPLC analysis of porpobilinogen on 24hr urine
A1
bilirubindiglucuronide
19. If the correlation coefficient (r) of two variables is zero...
270
there is an absence of correlation
1:5
alpha 2 beta
20. Aminotransferase enzymes catalyze the...
exchange of amino and keto groups
fresh morning urine for delta-aminolevulinic acid
270
porphobilinigen SCREEN
21. 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...
lead
nephelometry
normal - liver breakdown
emphysema
22. This is a regulatory hormone.
parathyroid hormone
pO2 increased HCO3 decreased
attaching them to protein molecules
T4 by RIA
23. An increase in serum acetone is indicative of a defect in the metabolism of...
cmpds based on molecular weight and size
carbs
properties of the membrane
without a disease with a negative test result
24. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...
TSH
sharp fibrinogen peak
binding capacity of thyroxine-binding globulin
transferrin
25. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
1.9
carbs
albumin
LDH
26. If a drug has a half-life of 7 hours - how many doses given at 7-hour intervals does it usually take to achieve a steady state or plateau level?
acid phosphatase
5
have a negative charge
didymium filter
27. The general types of interference in atomic absorption spectrophotometry...
Solute moves half the distance of the solvent front
0
O2
chemical ionization matrix
28. 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...
quantitation of label
porphobilinogen synthetase
emphysema
120 minutes
29. Bioavailability of a drug refers to the...
CML
fraction absorbed into systemic circulation
CK
HCT
30. A pH of 7.0 represents a H+ concentration of...
measures one ion more than others
elevated lactic acid - elevated pyruvate
100 nmol
glucose oxidase
31. A serum sample was assayed for bilirubin at 10 AM and the result was 12 mg/dL. The same sample was retested at 3 PM. The result now is 8 mg/dL. The most likely explanation for this discrepancy is...
sample exposed to light
NADH
without a disease with a negative test result
manic-depression
32. About 90% of phenytoin is excreted in the urine as...
metabolic acidosis
340
brain
para-hydroxylphenyl...
33. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...
turn off
attaching them to protein molecules
MI
C
34. 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...
high carbohydrate diet for 3 days
valine leucine isoleucine
1 micromole per minute
lipase
35. In the atomic absorption method for calcium - lanthanum is used...
prevent phosphate interference
ceruplasmin
brain
enzyme immunoassay
36. A breakdown product of hemoglobin is...
chloride
pH pCO2 pO2
bilirubin
<45
37. In the immunoinhibition phase of the CK-MB procedure...
nephelometry
accuracy
porphobilinogen screen
M subunit is inactivated
38. Blood was collected in a serum separator tube from a patient who had been fasting since midnight. The time of collection was 7:00 AM. The laboratory test that should be re-collected is...
591
triglycerides
no ice clots bubbles
Wilson's disease
39. An automated CK assay gives a reading that is above the limits of linearity. A dilution of the serum sample is made by adding 1 mL of serum to 9 mL of water. The instrument now rew 350 U/L. The correct report on the undiluted serum should be...
serum aliquots - one heated
270
3500
can be separated into distinct phenotypes
40. A 45-year-old woman has a fasting serum glucose concentration of 95 mg/dL and a 2-hour postprandial glucose concentration of 105 mg/dL. The statement that best describes this patient's fasting serum glucose concentration is...
growth - third trimester of pregnancy
atomic absorption
chemical ionization matrix
normal - liver breakdown
41. Specimens for blood gas determination should be drawn into a syringe containing...
A1
minimize the effects of interference
heparin
have a negative charge
42. The main reason for suboptimal drug levels in therapeutic drug monitoring is...
serum aliquots - one heated
can be separated into distinct phenotypes
patient noncompliance
cyclic antidepressants
43. When taken by a euthyroid individual - oral contraceptives containing estrogens will have this effects on the thyroid function studies
hyperventilation
no ice clots bubbles
whole blood can be used
increase in total circulating T4
44. An electrophoretic separation of lactate dehydrogenase isoenzymes that demonstrates an elevation in LD-l and LD-2 in a "flipped" pattern is consistent with...
MI
cysteine
decreased lecithin
heparin
45. Magnesium carbonate is added in an iron binding capacity determination in order to...
serum cortisol > 15
remove excess unbound iron
chloride
chemical ionization matrix
46. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
0
transferrin
BUN 80
freezing point
47. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
triglycerides
serum aliquots - one heated
run a new set of controls
acid phosphatase
48. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
impaired response to ACTH stimulation
digoxin
TSH
patient noncompliance
49. Blood samples were collected at the beginning of an exercise class and after 30 minutes of aerobic activity. This would be most consistent with the postexercise sample
crigler
elevated lactic acid - elevated pyruvate
whole blood can be used
glucose
50. The formula for calculating absorbance given the percent transmittance (%T) of a solution
hepatobiliary (obstruction?)
porphobilinogen screen
standard
2-log(T)
Sorry!:) No result found.
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