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Test your basic knowledge |
Chemistry Certification
Start Test
Study First
Subject
:
certifications
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. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...
NADH
whole blood can be used
591
Tay-sachs
2. The hemoglobin that is resistant to alkali (KOH) denaturation is...
obstructive jaundice
F
accuracy
CML
3. The osmolality of a urine or serum specimen is measured by a change in the...
GFR
apoenzyme
oxalacetate to malate
freezing point
4. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone
128
thiamine
improving state of metabolic control (as indicated by fructosamine)
Prolactin
5. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
<1%
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
tissue and serum levels need to reach equilibrium
adding an acid stabilizer
6. Total iron-binding capacity measures the serum iron transporting capacity of...
transferrin
normal - liver breakdown
enzyme immunoassay
dirty electrodes
7. The first step in analyzing a 24-hour urine specimen for quantitative urine protein is...
the fetus is at risk for respiratory distress
measure the total volume
without a disease with a negative test result
Hb S
8. A blood gas sample was sent to the lab on ice - and a bubble was present in the syringe. The blood had been exposed to room air for at least 30 minutes. The following change in blood gases occurred...
glycerol
pO2 increased HCO3 decreased
improving state of metabolic control (as indicated by fructosamine)
dihydroxyacetone side chain
9. 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
thymolpthalein monophosphate
creatinine clearance
lipase
methadone
10. A potentiometric electrode that measures an analyte that passes through a selectively premeable membrane and rapidly enters into an equilibrium with an electrolyte solution is...
methyl alcohol
pCO2
impaired response to ACTH stimulation
Mg
11. Lithium therapy is widely used in the treatment of...
5 tri 15 cholesterol 50 protein
endogenous triglycerides
manic-depression
glycerol
12. Kernicterus is an abnormal accumulation of bilirubin in...
testing heparinized plasma
TSH
brain
be able to detect 9/10 simple instrument malfunctions
13. Specimens for blood gas determination should be drawn into a syringe containing...
heparin
obstructive jaundice
parathyroid hormone
maintain colloidal osmotic pressure
14. About 90% of phenytoin is excreted in the urine as...
act as carriers for ions
40-50
2Na + glucose over 20 + BUN over 3
para-hydroxylphenyl...
15. In the immunoinhibition phase of the CK-MB procedure...
boderline results test should be repeated
M subunit is inactivated
thiamine
Wilson's disease
16. A chemiluminescent EIA...
is quantitated by the amount of light produced
heparin
a small concentration of APO-B containing lipoproteins after precipitation
there is an absence of correlation
17. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
enzyme induction
chloride
lead
<45
18. In thin layer chromatography - the Rf value for a compound is given by the...
there is an absence of correlation
ratio of distance moved by solvent to distance moved by compound
parathyroid hormone
plasma bicarbonate
19. At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?
lead
freezing point
20:1
immunofixation
20. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
corticosterone
measure the total volume
TLC
nondiagnostic for MS
21. A fresh urine sample is received for "porphyrins" or "porphyria" without further information or specifications. Initial analysis should include...
cancel test
porphyrin and porphobilinogen screen
alkaline picrate
bicarbonate carbonic acid
22. Cocaine is metabolized to...
benzoylecogine
bicarbonate buffer
triglycerides
catalyze redox reactions
23. This applies to cryoscopic osmometry
CK
TSH
Temperature is a function of the number of particles in solution
crigler
24. A reciprocal relationship exists between...
bilirubin
BUN 80
acute intermittent porphyria
Calcium - phosphorus
25. As part of a hyperlipidemia screening program - the following results were obtained on a 25 year old woman 6 hours after eating:Triglycerides = 260 mg/dLCholesterol = 120 mg/dL - This is the BEST interpretation of these results?
act as carriers for ions
cholesterol normal triglycerides elevated
thymolpthalein monophosphate
glass
26. Upon development of a thin layer chromatogram for the drug analysis - all drug spots (including the standards) had migrated with the solvent front. The most probable cause for this would be...
incorrect aqueous to nonaqueous mixture
100nmol
TSH
(testing of urine for) delta-am.. acid
27. A low concentrarion of serum phosphorus is commonly found in...
carbohydrate hyperalimentation
O2
tissue and serum levels need to reach equilibrium
Calcium - phosphorus
28. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...
parathyroid hormone
340
Tangier
faster than gamma
29. Serum concentrations of vitamin B12 are elevated in...
cholesterol normal triglycerides elevated
1 micromole per minute
CML
maintain colloidal osmotic pressure
30. The unit of measure for a standard solution is...
methadone
methyl alcohol
mg/ml
NADH
31. Sixty to seventy-five percent of the plasma cholesterol is transported by...
creatinine clearance
alpha 2 beta
bone
LDL
32. Beriberi is associated with deficiency of...
100 nmol
HCT
thiamine
C
33. The most heat labile fraction of alkaline phosphatase is obtained from...
remove excess unbound iron
electric current
bone
binding capacity of thyroxine-binding globulin
34. A 68-year-old man arrives in the emergency room with a glucose level of 722 mg/dL and serum acetone of 4+ undiluted. An arterial blood gas from this patient is likely to indicate...
alpha 2 beta
low pH
attaching them to protein molecules
cholesterol normal triglycerides elevated
35. The most widely used support medium for electrophoretic separation of lipoproteins is...
HCT
120 minutes
agarose
pCO2
36. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
porphobilinogen screen
dihydroxyacetone side chain
the same as plasma glucose
TSH
37. 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...
testing heparinized plasma
respiratory acidosis
one micromole/minute
pilocarpine
38. Currently the most common method for specific identification and quantitation of serum barbiturates is...
L/S ratio > 3.5
GLC
parathyroid
freezing point
39. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
Hb S
TSH
catalyze redox reactions
exposure to CO
40. Aminotransferase enzymes catalyze the...
hepatobiliary (obstruction?)
Tangier
ceruplasmin
exchange of amino and keto groups
41. TSH is produced by the...
1 mol/kg
thymolpthalein monophosphate
pituitary
prisms and grating
42. 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...
prostate
O2
bicarbonate carbonic acid
iron hemochromatosis
43. The most important buffer pair in plasma is the...
1 micromole per minute
chemical ionization matrix
inhibitor binds to enzyme at same site as substrate
bicarbonate carbonic acid
44. 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...
cmpds based on molecular weight and size
1.1
BUN 80
crigler
45. 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...
1 mol/kg
intestinal malabsorption
elevated lactic acid - elevated pyruvate
hepatobiliary (obstruction?)
46. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
primidone
methadone
120 minutes
respiratory ACIDOSIS
47. Calcium concentration in the serum is regulated by...
parathyroid hormone
wavelength
Solute moves half the distance of the solvent front
2Na + glucose over 20 + BUN over 3
48. The measurement of light scattered by particles in the sample is the principle of...
dirty applicators
nephelometry
F
adding an acid stabilizer
49. This diseases results from a familial absence of high-density lioprotein
chylomicrons VLDL
Tangier
no decrease in serum growth hormone after 90 minutes
can be separated into distinct phenotypes
50. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...
pCO2
one micromole/minute
urinary free cortisol
Temperature is a function of the number of particles in solution