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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. 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?
A1
elevated lactic acid - elevated pyruvate
run a new set of controls
270
2. While performing a serum lithium determination on a flame photometer with cesium as the internal standard - the technologist noticed that there was a flickering flame. The most probable cause of this problem is...
changes in the fuel
maintain colloidal osmotic pressure
LDL
electric current
3. Magnesium carbonate is added in an iron binding capacity determination in order to...
changes in the fuel
pituitary
remove excess unbound iron
aldolase
4. In an internal standard flame photometer - the internal standard is used to...
creatine kinase
a small concentration of APO-B containing lipoproteins after precipitation
correct for variations in flame and atomizer
manic-depression
5. Serum concentrations of vitamin B12 are elevated in...
carbohydrate hyperalimentation
parathyroid
21-hydroxylase deficiency
CML
6. Which two conditions can "physiologically" elevate serum alkaline phosphatase?
draw blood for glucose and discontinue test
growth - third trimester of pregnancy
parathyroid
lithium
7. A carbonate salt used to control manic-depressive disorders is...
tissue and serum levels need to reach equilibrium
lithium
mg/ml
glucose
8. The most consistent analytical error involved in the routine determination of HDLcholesterol is caused by...
HPLC analysis of porpobilinogen on 24hr urine
100nmol
thymolpthalein monophosphate
a small concentration of APO-B containing lipoproteins after precipitation
9. The identification of Bence Jones protein is best accomplished by...
glucose
run a new set of controls
immunofixation
TSH
10. The stimulant that causes localized sweating for the sweat test is...
pilocarpine
340
Temperature is a function of the number of particles in solution
TLC
11. The main reason for suboptimal drug levels in therapeutic drug monitoring is...
1 mol/kg
lower than in adults
sodium potassium chloride CO2
patient noncompliance
12. In respiratory acidosis - a compensatory mechanism is the increase in...
no decrease in serum growth hormone after 90 minutes
ionic charge
plasma bicarbonate
L/S ratio > 3.5
13. Lasting serum phosphate concentration is controlled primarily by the...
run a new set of controls
<45
parathyroid
Solute moves half the distance of the solvent front
14. In familial hypercholesterolemia - the hallmark finding is an elevation of...
digoxin
glucose oxidase
LDL
lower than in adults
15. Scurvy is associated with deficiency of...
Wilson's disease
CK
iron hemochromatosis
C
16. 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
MI
5
measurement of absorbance at 450
17. The major fraction of organic iodine in the circulation is in the form of...
one micromole/minute
65
thyroxine
@ 100
18. In thin layer chromatography - the Rf value for a compound is given by the...
manic-depression
ratio of distance moved by solvent to distance moved by compound
patient noncompliance
21-hydroxylase deficiency
19. The selectivity of an ion-selective electrode is determined by the...
properties of the membrane
amytriptyline 104
GFR
cmpds based on molecular weight and size
20. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...
faster than gamma
HPLC analysis of porpobilinogen on 24hr urine
trig
peroxidase-like activity of hemoglobin
21. A person suspected of having metabolic alkalosis would have these laboratory findings
prevent phosphate interference
CO2 and pH elevated
atomic absorption
120 minutes
22. The Porter-Silber method (phenylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?
dihydroxyacetone side chain
BUN increased
chemical ionization matrix
faster than gamma
23. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
correct for variations in flame and atomizer
the fetus is at risk for respiratory distress
LDH
glucose oxidase
24. The formula for calculating absorbance given the percent transmittance (%T) of a solution
200
2-log(T)
urobilin
correct for variations in flame and atomizer
25. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
alpha 2 beta
impaired response to ACTH stimulation
parathyroid
GLC
26. Blood received in the laboratory for blood gas analysis must meet these requirements
no ice clots bubbles
dihydroxyacetone side chain
acid phosphatase
fetal and placenta function
27. A technician is asked by the supervisor to prepare a standard solution from the stock standard. What is the glassware of choice for this solution?
show a decrease in glycosylated hgb
volumetric flask
100nmol
mg/ml
28. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
glucose
normal - liver breakdown
g/MW
<45
29. Lithium therapy is widely used in the treatment of...
brain
TSH
phenytoin
manic-depression
30. Characteristic of the Bence Jones protein that is used to distinguish it from other urinary proteins is its solubility...
obstructive jaundice
lead
@ 100
pilocarpine
31. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...
GGT
draw blood for glucose and discontinue test
21-hydroxylase deficiency
ratio of distance moved by solvent to distance moved by compound
32. TSH is produced by the...
bilirubin
pituitary
sharp cutoff filter
multiplied by 4
33. 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...
primary hyperparathyroidism
ALP with fresh draw
effluent line is obstructed
cyclic antidepressants
34. An electrophoretic separation of lactate dehydrogenase isoenzymes that demonstrates an elevation in LD-l and LD-2 in a "flipped" pattern is consistent with...
check serum for hemolysis
L/S ratio > 3.5
prevent phosphate interference
MI
35. A pH of 7.0 represents a H+ concentration of...
parathyroid hormone
properties of the membrane
conjugated hyperbilirubinemia - hepatocellular obstruction
100 nmol
36. The fast hemoglobin fraction is...
A1
corticosterone
cmpds based on molecular weight and size
pH = pKa + log (salt/acid)
37. In a double-beam photometer - the additional beam is used to...
urinary free cortisol
correct for variations in light intensity
1:5
no ice clots bubbles
38. A condition in which erythrocyte protoporphyrin is increased is...
iron deficiency anemia
90%
run a new set of controls
ammonia
39. Clinical assays for tumor markers are the most important for...
lipase
monitoring the course of a known cancer
200x affinity for oxygen
analyzed immediately
40. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
diet
porphobilinigen SCREEN
obstructive jaundice
5
41. Before unconjugated bilirubin can react with Ehrlich's diazo reagent - this must be added
specificity
pH pCO2 pO2
methyl alcohol
diet
42. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...
ammonia
albumin
1:5
cancel test
43. Given the following values:100;120;150;140;130;What is the mean?
lactic acidosis
pilocarpine
128
glucose tolerance test
44. Major actions of angiotensin II include...
cancel test
have a negative charge
BUN increased
increased vasoconstriction
45. The ability of a procedure to measure only the component(s) it claims to measure is called...
specificity
<1%
Mg
lead
46. Enzymes used in the diagnosis of acute pancreatitis?
scattered at a right angle
5
amylase and lipase
lead
47. Sixty to seventy-five percent of the plasma cholesterol is transported by...
remove excess unbound iron
LDL
alkaline picrate
<1%
48. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
didymium filter
boderline results test should be repeated
conjugated hyperbilirubinemia - hepatocellular obstruction
amylase
49. The regulation of calcium and phosphorus metabolism is accomplished by which gland?
freezing point
parathyroid
cancel test
bilirubindiglucuronide
50. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
the fetus is at risk for respiratory distress
chylomicrons
100 nmol
decreased lecithin