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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. The anion gap is useful for quality control of laboratory results for...
glucose
lead
40-50
sodium potassium chloride CO2
2. Aminotransferase enzymes catalyze the...
exchange of amino and keto groups
placenta
obstructive jaundice
specificity
3. 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...
pO2 increased HCO3 decreased
2Na + glucose over 20 + BUN over 3
M subunit is inactivated
volumetric flask
4. Serum levels that define hypoglycemia in preterm or low birth weight infants are...
chloride
M subunit is inactivated
hyperthyroidism
lower than in adults
5. An acid cleaning solution for glassware consists of...
viral hepatitis
potassium dichromate in SA
glucose oxidase
ALP with fresh draw
6. These enzymes of heme biosynthesis are inhibited by lead
porphobilinogen synthetase
1.9
hemolysis
lipase
7. Serum haptoglobin...
can be separated into distinct phenotypes
respiratory ACIDOSIS
dirty electrodes
ionic charge
8. A patient with hemolytic anemia will...
C
show a decrease in glycosylated hgb
the fetus is at risk for respiratory distress
check serum for hemolysis
9. The concentration of serum carotene is affected MOST by...
diet
run a new set of controls
hepatobiliary (obstruction?)
Calcium - phosphorus
10. A patient with glomerulonephritis would present the following serum results...
volumetric flask
BUN increased
check serum for hemolysis
high co2 and hco3
11. Gas chromatography with the nitrogen/phosphorus detector is the most commonly used technique for the analysis of...
cyclic antidepressants
amylase and lipase
atomic absorption
elevated lactic acid - elevated pyruvate
12. Most chemical methods for determining total protein utilize this reaction?
measures one ion more than others
cancel test
biuret
correct for variations in flame and atomizer
13. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?
200x affinity for oxygen
CO2
glucose oxidase
5mg higher
14. An increase in serum acetone is indicative of a defect in the metabolism of...
benzoylecogine
exposure to CO
carbs
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
15. This would be an example of a glucose-specific colorimetric method
glucose oxidase
F
Tangier
without a disease with a negative test result
16. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
remove excess unbound iron
<45
lead
nondiagnostic for MS
17. 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?
340
be able to detect 9/10 simple instrument malfunctions
GFR
bilirubindiglucuronide
18. The preparation of a patient for standard tolerance testing should include...
ALP with fresh draw
high carbohydrate diet for 3 days
Hb S
pO2 increased HCO3 decreased
19. 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...
GGT
high co2 and hco3
32
beta
20. 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)
improving state of metabolic control (as indicated by fructosamine)
oxalacetate to malate
boderline results test should be repeated
changes in the fuel
21. 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...
chylomicrons
intestinal malabsorption
whole blood can be used
is quantitated by the amount of light produced
22. A stool specimen that appears black and tarry should be tested for the presence of...
occult blood
hyperthyroidism
bilirubin
corticosterone
23. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
20:1
normal - liver breakdown
didymium filter
para-hydroxylphenyl...
24. Lasting serum phosphate concentration is controlled primarily by the...
parathyroid
dirty applicators
accuracy
porphyrin and porphobilinogen screen
25. The most widely employed screening technique for drug abuse is...
TLC
attaching them to protein molecules
GFR
LDL
26. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
breast cancer
creatine kinase
peptide bonds
viral hepatitis
27. A 9-month-old boy from Israel has gradually lost the ability to sit up and develops seizures. He has an increased amount of a phospholipid called GM2-ganglioside in his neurons - and he lacks the enzyme hexosaminidase A in his leukocytes. These findi
Tay-sachs
T4 by RIA
bicarbonate buffer
MI
28. A common cause of respiratory alkalosis is...
run a new set of controls
100nmol
bilirubin
hyperventilation
29. Four children are admitted with malaise - anorexia - and abdominal pain. Further evaluations reveal mild anemia - erythrocyte basophilic stippling - and profound pica habits. Poisoning by which heavy metal is most likely responsible?
lead
HPLC analysis of porpobilinogen on 24hr urine
GLC
trig
30. The hemoglobin that is resistant to alkali (KOH) denaturation is...
trig
high co2 and hco3
F
testosterone
31. The main reason for suboptimal drug levels in therapeutic drug monitoring is...
patient noncompliance
thiamine
Wilson's disease
volumetric flask
32. A potassium level of 6.8 mEq/L is obtained. Before reporting the results - the first step the technologist should take is to...
check serum for hemolysis
TSH
primary hyperparathyroidism
low pH
33. Malic dehydrogenase is added to the aspartate aminotransaminase (AST) reaction to catalyze the conversion of...
O2
F
oxalacetate to malate
properties of the membrane
34. Blood received in the laboratory for blood gas analysis must meet these requirements
MI
respiratory ACIDOSIS
phenytoin
no ice clots bubbles
35. Sixty to seventy-five percent of the plasma cholesterol is transported by...
creatine kinase
LDL
cmpds based on molecular weight and size
manic-depression
36. Major actions of angiotensin II include...
show a decrease in glycosylated hgb
pilocarpine
increased vasoconstriction
low pH
37. In a double-beam photometer - the additional beam is used to...
glucose tolerance test
correct for variations in light intensity
Prolactin
multiplied by 4
38. The formation of estriol in a pregnant woman is dependent on...
chylomicrons
fetal and placenta function
be able to detect 9/10 simple instrument malfunctions
normal - liver breakdown
39. 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...
correct for variations in light intensity
O2
parathyroid hormone
C3 complement
40. The measurement of light scattered by particles in the sample is the principle of...
A1c
Tangier
endogenous triglycerides
nephelometry
41. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
no decrease in serum growth hormone after 90 minutes
0
sodium potassium chloride CO2
C
42. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?
ceruplasmin
testosterone
alpha 2 beta
testing heparinized plasma
43. The osmolality of a urine or serum specimen is measured by a change in the...
porphobilinogen synthetase
one micromole/minute
thiamine
freezing point
44. A patient is admitted to the emergency room in a state of metabolic alkalosis.This would be consistent with this diagnosis?
attaching them to protein molecules
HCT
high co2 and hco3
ceruplasmin
45. The formula for calculating the amount of moles of a chemical?
200
show a decrease in glycosylated hgb
g/MW
heparin
46. Spectrophotometers isolate a narrow band pass by means of...
fetal and placenta function
prisms and grating
have a negative charge
immunofixation
47. A 21-year-old man with nausea - vomiting - and jaundice has the following laboratory findings: Total serum bilirubin level: 8.5 mg/dL (normal - 0-1.0) Conjugated serum bilirubin level: 6.1 mg/dL (normal - 0-0.5) Urine urobilinogen: Increased Fecal u
Tay-sachs
ionization of carboxyl groups (yielding a net negative charge)
be able to detect 9/10 simple instrument malfunctions
conjugated hyperbilirubinemia - hepatocellular obstruction
48. 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...
emphysema
methyl alcohol
iron deficiency anemia
whole blood can be used
49. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
bicarbonate buffer
LDL
GLC
emphysema
50. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...
urinary free cortisol
metabolic acidosis
lead
ceruplasmin
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