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Chemistry Certification
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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. A 25-year-old man became nauseated and vomited 90 minutes after receiving a standard 75-g carbohydrate dose for an oral glucose tolerance test. The best course of action is...
draw blood for glucose and discontinue test
porphobilinogen synthetase
specimen exposure to light
spun separated iced and tested immediately
2. 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...
O2
thiamine
CK
endogenous triglycerides
3. Scurvy is associated with deficiency of...
C
enzyme induction
urinary free cortisol
glucose tolerance test
4. A course of instruction is being planned to teach laboratory employees to correct simple malfunctions in selected laboratory instruments. In writing the objectives for this course - this would be most appropriate?
porphobilinogen screen
be able to detect 9/10 simple instrument malfunctions
Solute moves half the distance of the solvent front
one micromole/minute
5. Phenobarbital is a metabolite of...
placenta
whole blood can be used
primidone
enzyme immunoassay
6. To ensure an accurate ammonia level result - the specimen should be...
conjugated hyperbilirubinemia - hepatocellular obstruction
boderline results test should be repeated
faster than gamma
spun separated iced and tested immediately
7. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...
sharp fibrinogen peak
potassium dichromate in SA
200
C
8. 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...
porphyrin and porphobilinogen screen
120 minutes
hyperthyroidism
SD over mean
9. Ninety percent of the copper present in plasma is bound to...
no ice clots bubbles
ceruplasmin
Tangier
pCO2
10. Stray light can be detected in a spectrophotometer by utilizing a...
sharp cutoff filter
hepatobiliary (obstruction?)
TSH
effluent line is obstructed
11. A true statement about high performance liquid chromatography (HPLC) is that it...
creatinine clearance
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
cancel test
glucose
12. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?
wavelength
CK-MB
BUN 80
5
13. The main reason for suboptimal drug levels in therapeutic drug monitoring is...
1.9
(testing of urine for) delta-am.. acid
patient noncompliance
GGT
14. At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?
hyperthyroidism
20:1
O2
brain
15. The enzyme that exists chiefly in skeletal muscle - heart - and brain; is grossly elevated in active muscular dystrophy; and rises early in myocardial infarction is...
F
ammonia
creatine kinase
mg/ml
16. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
0
hyperventilation
200
check serum for hemolysis
17. A 2-year-old child with a decreased serum T4 is described as being somewhat dwarfed - stocky - overweight - and having coarse features. Of the following - the most informative additional laboratory test would be the serum...
270
Tangier
TSH
quantitation of label
18. The selectivity of an ion-selective electrode is determined by the...
cyclic antidepressants
impaired response to ACTH stimulation
1 mol/kg
properties of the membrane
19. Serum levels that define hypoglycemia in preterm or low birth weight infants are...
increased vasoconstriction
lower than in adults
lipase
fetal and placenta function
20. The most widely used support medium for electrophoretic separation of lipoproteins is...
bicarbonate carbonic acid
sharp cutoff filter
agarose
40-50
21. This steroid is an adrenal cortical hormone
corticosterone
measure the total volume
glycerol
pilocarpine
22. The ability of a procedure to measure only the component(s) it claims to measure is called...
oxalacetate to malate
check serum for hemolysis
mg/ml
specificity
23. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
pilocarpine
correct for variations in light intensity
TSH
crigler
24. The method of choice for diagnosis of a protracted attack of porphyria is...
boderline results test should be repeated
carbohydrate hyperalimentation
M subunit is inactivated
HPLC analysis of porpobilinogen on 24hr urine
25. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
properties of the membrane
40-50
glass
glucose tolerance test
26. This would be an example of a glucose-specific colorimetric method
viral hepatitis
measurement of absorbance at 450
1 micromole per minute
glucose oxidase
27. A patient is admitted with biliary cirrhosis. If a serum protein electrophoresis is preformed - these globulin fractions will be most elevated?
occult blood
beta
Mg
chylomicrons VLDL
28. A sweat chloride result of 55 mEq/L and a sweat sodium of 52 mEq/L were obtained ona patient who has a history of respiratory problems. The bestc interpretation of these results is...
TSH
boderline results test should be repeated
potassium dichromate in SA
B12 deficiency
29. Which blood gas electrode is composed of calomel and glass?
Tay-sachs
CO2
thyroxine binding globulin
MI
30. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
porphyrin and porphobilinogen screen
binding capacity of thyroxine-binding globulin
maintain colloidal osmotic pressure
glucose
31. In the assay of lactate dehydrogenase - this product is actually measured
primidone
nondiagnostic for MS
9
NADH
32. The most heat labile fraction of alkaline phosphatase is obtained from...
bone
apoenzyme
270
corticosterone
33. The most important buffer pair in plasma is the...
measurement of absorbance at 450
Wilson's disease
100nmol
bicarbonate carbonic acid
34. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...
CML
fall in pH - rise in pCO2
cysteine
whole blood can be used
35. Most automated blood gas analyzers directly measure...
decreased lecithin
pH pCO2 pO2
chloride
Mg
36. The urea nitrogen concentration of a serum sample was measured as 15 mg/dL (atomic weights: carbon = 12 - oxygen = 16 - nitrogen = 14 - hydrogen = 1). The urea concentration of the same sample - in mg/dL - is...
elevated lactic acid - elevated pyruvate
intestinal malabsorption
GGT
32
37. The Porter-Silber method (phenylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?
F
prisms and grating
dihydroxyacetone side chain
270
38. A patient with type I insulin-dependent diabetes mellitus has the following results: Fasting blood glucose: 150 mg/dL (70-110 rng/dL) Hemoglobin A1c: 25% (6.0%-19.5%) Fructosamine: 3.0 mmol/L ( 2.0-5.3 mmol/L)
C
maintain colloidal osmotic pressure
pO2 increased HCO3 decreased
improving state of metabolic control (as indicated by fructosamine)
39. An HPLC operator notes that the column pressure is too high - is rising too rapidly - and the recorder output is not producing normal peaks. The most probable cause of the problem is...
exchange of amino and keto groups
effluent line is obstructed
chloride
100nmol
40. The following laboratory results were obtained: Serum Calcium: Increased - Urine Calcium: Increased - Serum Phosphate: Decreased - Urine Phosphate: Increased Serum Alkaline Phosphatase: Normal or Increased These results are most compatible with...
TSH
primary hyperparathyroidism
spun separated iced and tested immediately
mg/ml
41. A patient with malabsorption receives 25 g of d-xylose orally; during the subsequent 5-hour period - the urine excretion of d-xylose is less than 3 g. This would indicate...
128
intestinal malabsorption
creatine kinase
100 nmol
42. Lasting serum phosphate concentration is controlled primarily by the...
glucose
enzyme immunoassay
parathyroid
boderline results test should be repeated
43. The function of the major lipid components of the very low density lipoproteins (VLDL) is to transport...
didymium filter
endogenous triglycerides
ionic charge
serum cortisol > 15
44. Total iron-binding capacity measures the serum iron transporting capacity of...
CO2 and pH elevated
transferrin
inhibitor binds to enzyme at same site as substrate
elevated lactic acid - elevated pyruvate
45. Ion selective electrodes are called selective rather than specific because they actually measure the...
faster than gamma
sharp fibrinogen peak
thyroxine binding globulin
measures one ion more than others
46. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
Hb S
acute intermittent porphyria
nondiagnostic for MS
standard
47. The unit of measure for a standard solution is...
mg/ml
bilirubindiglucuronide
specimen exposure to light
respiratory ACIDOSIS
48. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
pCO2
catalyze redox reactions
acid phosphatase
Temperature is a function of the number of particles in solution
49. This applies to cryoscopic osmometry
hyperthyroidism
Temperature is a function of the number of particles in solution
ceruplasmin
C3 complement
50. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
2Na + glucose over 20 + BUN over 3
standard
placenta
albumin
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