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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. Assay of transketolase activity in blood is used to detect deficiency of...
placenta
spun separated iced and tested immediately
pituitary
thiamine
2. Maple syrup urine disease is characterized by an increase in this urinary amino acids
ceruplasmin
valine leucine isoleucine
have a negative charge
pCO2
3. Enzymes used in the diagnosis of acute pancreatitis?
A1
amylase and lipase
lipase
parathyroid
4. 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...
4.5
GFR
Solute moves half the distance of the solvent front
incorrect aqueous to nonaqueous mixture
5. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
apoenzyme
5
impaired response to ACTH stimulation
lead
6. Blood received in the laboratory for blood gas analysis must meet these requirements
100nmol
correct for variations in light intensity
analyzed immediately
no ice clots bubbles
7. An automated method for measuring chloride that generates silver ions in the reaction is...
coulometry
TSH
check serum for hemolysis
one micromole/minute
8. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
run a new set of controls
1.9
run a new set of controls
urobilin
9. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
manic-depression
bicarbonate buffer
fresh morning urine for delta-aminolevulinic acid
correct for variations in light intensity
10. Unless blood gas measurements are made immediately after sampling - in vitro glycolysis of the blood causes a...
immunofixation
enzyme induction
fall in pH - rise in pCO2
chylomicrons VLDL
11. This diseases results from a familial absence of high-density lioprotein
specimen exposure to light
C
Tangier
no ice clots bubbles
12. 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
viral hepatitis
120 minutes
Tay-sachs
13. 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...
standard
1.1
GFR
<1%
14. The chemical composition of HDL- cholesterol corresponds to...
creatinine clearance
5 tri 15 cholesterol 50 protein
there is an absence of correlation
TSH
15. A one MOLAL solution is equivalent to...
parathyroid hormone
lower than in adults
run a new set of controls
1 mol/kg
16. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone
transferrin
Prolactin
MI
act as carriers for ions
17. In the Jaffe reaction - creatine reacts with...
alkaline picrate
minimize the effects of interference
standard
iron hemochromatosis
18. The ability of a procedure to measure only the component(s) it claims to measure is called...
specificity
aldolase
intestinal malabsorption
tissue and serum levels need to reach equilibrium
19. 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...
biuret
minimize the effects of interference
pH pCO2 pO2
primary hyperparathyroidism
20. Turbidity in serum suggests elevation of...
(testing of urine for) delta-am.. acid
chylomicrons
BUN 80
pO2 increased HCO3 decreased
21. The osmolality of a urine or serum specimen is measured by a change in the...
aldolase
thyroxine binding globulin
40-50
freezing point
22. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...
phenytoin
Calcium - phosphorus
120 minutes
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
23. A patient had the following serum results: Na+ 140 mEq/L K+ 4.0 mEq/L Glucose 95 mg/dL BUN 10 mg/dL Which osmolality is consistent with these results?
270
lactic acidosis
alpha 2 beta
ionization of carboxyl groups (yielding a net negative charge)
24. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?
chloride
BUN 80
cysteine
obstructive jaundice
25. On immunoassays using enzyme-labeled antibodies or antigens: ___________ can be carried out with a spectrophotometer
CO2 and pH elevated
fresh morning urine for delta-aminolevulinic acid
TSH
quantitation of label
26. Given the following results: Alkaline phosphatase Marked increase Aminotransferase Slight increase Aspartate aminotransferase Slight increase Alanine gamma-glutamyl transferase Marked increase This is most consistent with...
ALP with fresh draw
obstructive jaundice
M subunit is inactivated
parathyroid
27. In amniotic fluid - the procedure used to detect Rh isosensitization is...
respiratory acidosis
be able to detect 9/10 simple instrument malfunctions
measurement of absorbance at 450
CK-MB
28. The formation of estriol in a pregnant woman is dependent on...
lithium
cysteine
fetal and placenta function
brain
29. A reciprocal relationship exists between...
peroxidase-like activity of hemoglobin
draw blood for glucose and discontinue test
porphobilinogen synthetase
Calcium - phosphorus
30. The fast hemoglobin fraction is...
analyzed immediately
A1
conjugated hyperbilirubinemia - hepatocellular obstruction
ALP with fresh draw
31. In respiratory acidosis - a compensatory mechanism is the increase in...
270
340
plasma bicarbonate
urinary free cortisol
32. In using ion-exchange chromatographicbmethods - falsely increased levels of Hgb A1c will be demonstrated in presence of...
Hb S
40-50
diet
200
33. The following data were obtained on amniotic fluid from a gestation of 36 weeks' duration by menstrual dates: L/S = 2 Phosphatidyl glycerol not present This can be concluded from these data?
endogenous triglycerides
cmpds based on molecular weight and size
the fetus is at risk for respiratory distress
transferrin
34. Serum from a patient with metastatic carcinoma of the prostate was separated from the clot and stored at room temperature. The following results were obtained: Patient Reference Range Calcium: 10.8 mg/dL 8.8-10.3 mg/dL LD:420 U/L 50-150 U/L Acid phos
prisms and grating
standard
carbs
ALP with fresh draw
35. An increase in serum acetone is indicative of a defect in the metabolism of...
1.9
beta
carbs
metabolic acidosis
36. A patient with myeloproliferative disorder has the following values: Hgb = 13 g/dL Hct = 38% WBC = 30 x 10^3/uL Platelets = 1000 x 10^3/uL Serum Na+ = 140 mEq/L Serum K+ = 7 mEq/L The serum K+ should be confirmed by...
mg/ml
have a negative charge
testing heparinized plasma
tissue and serum levels need to reach equilibrium
37. The first step in analyzing a 24-hour urine specimen for quantitative urine protein is...
elevated lactic acid - elevated pyruvate
measure the total volume
manic-depression
Mg
38. The preparation of a patient for standard tolerance testing should include...
is quantitated by the amount of light produced
high carbohydrate diet for 3 days
breast cancer
65
39. 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
properties of the membrane
manic-depression
parathyroid
40. A psychiatric patient was experiencing sever depression - but responded to treatment with amitriptyline with no apparent side effects. A blood sample was sent to the laboratory for therapeutic monitoring. Which drug level would be MOST reflective of
chloride
a small concentration of APO-B containing lipoproteins after precipitation
amytriptyline 104
ALP with fresh draw
41. 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...
BUN increased
purulent
oxalacetate to malate
electric current
42. 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...
impaired response to ACTH stimulation
act as carriers for ions
2Na + glucose over 20 + BUN over 3
effluent line is obstructed
43. This enzyme substrates for prostatic acid phosphatase determination results in the highest specificity
potassium dichromate in SA
trig
urinary free cortisol
thymolpthalein monophosphate
44. Sixty to seventy-five percent of the plasma cholesterol is transported by...
testosterone
measurement of absorbance at 450
LDL
measure the total volume
45. The most specific enzyme test for acute pancreatitis is...
creatinine
be able to detect 9/10 simple instrument malfunctions
lipase
specificity
46. The hemoglobin that is resistant to alkali (KOH) denaturation is...
CO2 and pH elevated
high carbohydrate diet for 3 days
run a new set of controls
F
47. When myocardial infarction occurs - the first enzyme to become elevated is...
decreased lecithin
CK
CK-MB
TSH
48. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...
porphobilinigen SCREEN
agarose
mg/ml
ammonia
49. Calcium concentration in the serum is regulated by...
200
show a decrease in glycosylated hgb
iron hemochromatosis
parathyroid hormone
50. About 90% of phenytoin is excreted in the urine as...
prostate
heparin
trig
para-hydroxylphenyl...