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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. 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
specimen exposure to light
ALP with fresh draw
LDH
lithium
2. This electrolyte is the chief plasma cation whose main function is maintaining osmotic pressure
patient noncompliance
32
sodium
100 nmol
3. Isoenzyme assays are preformed to improve...
CML
impaired response to ACTH stimulation
CO2 and pH elevated
specificity
4. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus
apoenzyme
200
2Na + glucose over 20 + BUN over 3
F
5. 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...
cyclic antidepressants
g/MW
inhibitor binds to enzyme at same site as substrate
standard
6. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
0
draw blood for glucose and discontinue test
testing heparinized plasma
exposure to CO
7. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
absorptivity x light path x concentration
dirty applicators
didymium filter
immunofixation
8. The general types of interference in atomic absorption spectrophotometry...
chemical ionization matrix
endosmosis
primidone
placenta
9. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
glucose
2-log(T)
purulent
no decrease in serum growth hormone after 90 minutes
10. A pH of 7.0 represents a H+ concentration of...
conjugated hyperbilirubinemia - hepatocellular obstruction
100 nmol
acute hepatitis
dirty electrodes
11. After a difficult venipuncture requiring prolonged application of the tourniquet - the serum K+ was found to be 6.8 mEq/L. The best course of action is to...
CK-MB
lower than in adults
methyl alcohol
cancel test
12. A pH of 7.0 represents a H+ concentration of...
dirty applicators
100nmol
coulometry
Prolactin
13. The formation of estriol in a pregnant woman is dependent on...
quantitation of label
@ 100
fetal and placenta function
ALP with fresh draw
14. The most widely employed screening technique for drug abuse is...
TLC
spun separated iced and tested immediately
fall in pH - rise in pCO2
porphyrin and porphobilinogen screen
15. 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
elevated lactic acid - elevated pyruvate
MI
ratio of distance moved by solvent to distance moved by compound
wavelength
16. Hydrogen ion concentration (pH) in blood is usually determined by means of these electrodes?
glass
valine leucine isoleucine
5 tri 15 cholesterol 50 protein
lead
17. TSH is produced by the...
T4 by RIA
iron hemochromatosis
acute hepatitis
pituitary
18. 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...
adding an acid stabilizer
intestinal malabsorption
the same as plasma glucose
normal - liver breakdown
19. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?
lipase
fall in pH - rise in pCO2
breast cancer
<1%
20. This enzymes catalyzes the conversion of starch to glucose and maltose
3500
CO2
amylase
breast cancer
21. The reason carbon monoxide is so toxic is because it...
band width
acute hepatitis
show a decrease in glycosylated hgb
200x affinity for oxygen
22. In the sweat test - the sweating stimulant is introduced to the skin by application of...
effluent line is obstructed
is quantitated by the amount of light produced
electric current
lipase
23. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
acid phosphatase
respiratory ACIDOSIS
growth - third trimester of pregnancy
amylase
24. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
crigler
dirty electrodes
measures one ion more than others
creatinine clearance
25. Turbidity in serum suggests elevation of...
Calcium - phosphorus
cyclic antidepressants
electric current
chylomicrons
26. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
parathyroid hormone
viral hepatitis
1 mol/kg
CML
27. Analysis of erythrocytes for uroporphyrinogen I synthetase detects...
measures one ion more than others
thiamine
acute intermittent porphyria
enzyme induction
28. A patient is admitted to the emergency room in a state of metabolic alkalosis.This would be consistent with this diagnosis?
SD over mean
amytriptyline 104
CK-MB
high co2 and hco3
29. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
C
porphobilinogen screen
specificity
prostate
30. The major fraction of organic iodine in the circulation is in the form of...
1.9
21-hydroxylase deficiency
thyroxine
thyroxine binding globulin
31. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?
MI
5mg higher
iron deficiency anemia
porphyrin and porphobilinogen screen
32. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...
1 micromole per minute
3500
hemolysis
run a new set of controls
33. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
5
glucose tolerance test
amylase and lipase
cholesterol normal triglycerides elevated
34. 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...
pituitary
boderline results test should be repeated
CO2 and pH elevated
attaching them to protein molecules
35. A breakdown product of hemoglobin is...
bilirubin
serum cortisol > 15
carbohydrate hyperalimentation
nondiagnostic for MS
36. In developing the reference for a new EIA for CEA - the range for the normal population was broader than that published by the vendor. Controls are acceptable with a narrow coefficient of variation. This may be explained by...
iron hemochromatosis
lower than in adults
inclusion of smokers and nonsmokers in the study population
nephelometry
37. In a double-beam photometer - the additional beam is used to...
high co2 and hco3
correct for variations in light intensity
TSH
incorrect aqueous to nonaqueous mixture
38. The biuret reaction for the analysis of serum protein depends on the number...
peptide bonds
increased O2 decreased HCO3
phenytoin
CO2 and pH elevated
39. A true statement about high performance liquid chromatography (HPLC) is that it...
Tay-sachs
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
spun separated iced and tested immediately
glucose
40. Upon completion of a run of cholesterol tests - the technician recognizes that the controls are not within the two standard deviations confidence range. What is the appropriate course of action
run a new set of controls
multiplied by 4
changes in the fuel
prisms and grating
41. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
chylomicrons VLDL
increase in total circulating T4
enzyme induction
acid phosphatase
42. This method offers the greatest sensitivity for HBsAg testing
enzyme immunoassay
TSH
sharp cutoff filter
340
43. Detection of carriers of hereditary coproporphyria should include analysis of...
fresh morning urine for delta-aminolevulinic acid
methadone
be able to detect 9/10 simple instrument malfunctions
HPLC analysis of porpobilinogen on 24hr urine
44. A chemiluminescent EIA...
atomic absorption
Solute moves half the distance of the solvent front
acute hepatitis
is quantitated by the amount of light produced
45. A one MOLAL solution is equivalent to...
ammonia
aldolase
oxalacetate to malate
1 mol/kg
46. To ensure an accurate ammonia level result - the specimen should be...
spun separated iced and tested immediately
testosterone
TSH
Solute moves half the distance of the solvent front
47. 4 mL of water is added to 1 mL of serum. This represents this serum dilutions
chylomicrons
1:5
metabolic acidosis
exchange of amino and keto groups
48. Most automated blood gas analyzers directly measure...
pH pCO2 pO2
TSH
accuracy
monitoring the course of a known cancer
49. A reciprocal relationship exists between...
Calcium - phosphorus
coulometry
2Na + glucose over 20 + BUN over 3
transferrin
50. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
Tay-sachs
show a decrease in glycosylated hgb
9
serum aliquots - one heated