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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. This wavelengths is within the ultraviolet rang.
200
iron hemochromatosis
340
obstructive jaundice
2. Alkaline phosphatase Slight increase - Aminotransferase Marked increase - Aspartate aminotransferase Marked increase - Alanine gamma-glutamyl transferase Slight increase
effluent line is obstructed
100nmol
correct for variations in light intensity
acute hepatitis
3. A fasting serum sample from an asymptomatic 43-year-old woman is examined visually chemically with the following results: Initial appearance of serum: Milky Appearance of serum after overnight refrigeration: Cream layer over turbid serum Triglyceri
chylomicrons VLDL
low pH
primidone
faster than gamma
4. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
serum aliquots - one heated
sharp fibrinogen peak
thymolpthalein monophosphate
biuret
5. In familial hypercholesterolemia - the hallmark finding is an elevation of...
corticosterone
GFR
LDL
alpha 2 beta
6. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
amylase and lipase
4.5
GGT
biuret
7. This diseases results from a familial absence of high-density lioprotein
chylomicrons
(testing of urine for) delta-am.. acid
porphobilinigen SCREEN
Tangier
8. This method employs a highly specific antibody to thyroxine
T4 by RIA
measurement of absorbance at 450
TLC
iron deficiency anemia
9. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate
dirty electrodes
aldolase
A1
D
10. The formula for calculating the amount of moles of a chemical?
mg/ml
g/MW
specimen exposure to light
porphobilinogen screen
11. To ensure an accurate ammonia level result - the specimen should be...
HPLC analysis of porpobilinogen on 24hr urine
peptide bonds
elevated lactic acid - elevated pyruvate
spun separated iced and tested immediately
12. Amino acid associated with a sulfhydryl group
cysteine
Prolactin
prevent phosphate interference
chylomicrons
13. A breakdown product of hemoglobin is...
spun separated iced and tested immediately
correct for variations in light intensity
bilirubin
CO2
14. Measurement of the serum acid phosphatase is used to detect neoplastic disease of the...
prostate
L/S ratio > 3.5
primidone
increased vasoconstriction
15. 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...
cancel test
pH = pKa + log (salt/acid)
testosterone
bone
16. This would be an example of a glucose-specific colorimetric method
CK-MB
testosterone
glucose oxidase
LDL
17. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
metabolic acidosis
trig
LDL
<45
18. 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...
CK-MB
iron hemochromatosis
hyperthyroidism
no decrease in serum growth hormone after 90 minutes
19. On immunoassays using enzyme-labeled antibodies or antigens: ___________ can be carried out with a spectrophotometer
quantitation of label
dirty applicators
didymium filter
attaching them to protein molecules
20. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
porphobilinogen screen
triglycerides
methyl alcohol
trig
21. Serum anion gap is increased in patients with...
2-log(T)
didymium filter
lactic acidosis
lithium
22. A reciprocal relationship exists between...
improving state of metabolic control (as indicated by fructosamine)
Calcium - phosphorus
pituitary
changes in the fuel
23. The stimulant that causes localized sweating for the sweat test is...
pilocarpine
fall in pH - rise in pCO2
amylase
pH pCO2 pO2
24. A stool specimen that appears black and tarry should be tested for the presence of...
measurement of absorbance at 450
multiplied by 4
occult blood
prisms and grating
25. 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...
high co2 and hco3
O2
increased O2 decreased HCO3
porphobilinogen synthetase
26. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
TSH
chylomicrons
absorptivity x light path x concentration
Calcium - phosphorus
27. Major actions of angiotensin II include...
carbohydrate hyperalimentation
aldolase
120 minutes
increased vasoconstriction
28. 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...
inclusion of smokers and nonsmokers in the study population
hepatobiliary (obstruction?)
run a new set of controls
5
29. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?
alpha 2 beta
CO2 and pH elevated
chemical ionization matrix
TSH
30. 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
g/MW
check serum for hemolysis
pO2 increased HCO3 decreased
run a new set of controls
31. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...
B12 deficiency
carbs
corticosterone
ionization of carboxyl groups (yielding a net negative charge)
32. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
oxalacetate to malate
no decrease in serum growth hormone after 90 minutes
scattered at a right angle
prostate
33. The nanometer is a measurement of...
LDH
Wilson's disease
wavelength
benzoylecogine
34. A chemiluminescent EIA...
is quantitated by the amount of light produced
porphyrin and porphobilinogen screen
Calcium - phosphorus
plasma bicarbonate
35. In the assay of lactate dehydrogenase - this product is actually measured
lipase
NADH
@ 100
incorrect aqueous to nonaqueous mixture
36. TSH is produced by the...
beta
lactic acidosis
glucose
pituitary
37. Given the following values:100;120;150;140;130;What is the mean?
WITHOUT a disease with a negative test
120 minutes
pH = pKa + log (salt/acid)
128
38. The Henderson-Hasselbalch equation
lower than in adults
pH = pKa + log (salt/acid)
without a disease with a negative test result
BUN increased
39. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
correct for variations in light intensity
endosmosis
decreased lecithin
thymolpthalein monophosphate
40. A thick white turbid specimen was received in the laboratory labeled as pericardial fluid. A microscopic examination was performed - and the differential included 90% PMNs. The fluid is...
absorptivity x light path x concentration
purulent
incorrect aqueous to nonaqueous mixture
placenta
41. This hemoglobin has glucose-6-phosphate on the amino-terminal valine of the beta chain?
low pH
A1c
20:1
fetal and placenta function
42. The anion gap is useful for quality control of laboratory results for...
sodium potassium chloride CO2
alpha 2 beta
creatine kinase
bicarbonate buffer
43. The following laboratory results were obtained on arterial blood: Sodium 136 mEq/L pH 7.32 Potassium 4.4 mEq/L PCO2 79 mm Hg Chloride 92 mEq/L Bicarbonate 40 mEq/L These results are most compatible with...
B12 deficiency
low pH
lipase
respiratory acidosis
44. A carbonate salt used to control manic-depressive disorders is...
lithium
methyl alcohol
is quantitated by the amount of light produced
analyzed immediately
45. Coulometry is used to measure...
prostate
pituitary
chloride
ratio of distance moved by solvent to distance moved by compound
46. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
mg/ml
glucose tolerance test
iron deficiency anemia
fetal and placenta function
47. Scurvy is associated with deficiency of...
creatinine
thyroxine binding globulin
C
enzyme induction
48. In performing a spinal fluid protein determination - the specimen is diluted 1 part spinal fluid to 3 parts saline to obtain a result low enough to measure. To calculate the protein concentration the result must be...
faster than gamma
5 tri 15 cholesterol 50 protein
whole blood can be used
multiplied by 4
49. Serum and urine copper levels are assayed on a hospital patient with the following results: Patient Serum Cu: 58 ug/dL; Reference Value:70-140 ug/dL Patient Urine Cu: 83 ug/dL ; Reference Value: < 40 ug/dL This is most consistent with...
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50. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
MI
para-hydroxylphenyl...
measure the total volume
placenta