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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. Kernicterus is an abnormal accumulation of bilirubin in...
brain
200x affinity for oxygen
F
high co2 and hco3
2. In the atomic absorption method for calcium - lanthanum is used...
TSH
prevent phosphate interference
triglycerides
tissue and serum levels need to reach equilibrium
3. The regulation of calcium and phosphorus metabolism is accomplished by which gland?
parathyroid
lead
3500
591
4. The formula for coefficient of variation?
dirty electrodes
BUN 80
lower than in adults
SD over mean
5. If a drug has a half-life of 7 hours - how many doses given at 7-hour intervals does it usually take to achieve a steady state or plateau level?
dirty applicators
porphobilinogen screen
measures one ion more than others
5
6. Analysis of erythrocytes for uroporphyrinogen I synthetase detects...
pituitary
acute intermittent porphyria
apoenzyme
sharp cutoff filter
7. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
200
bicarbonate buffer
chylomicrons
electric current
8. 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...
nondiagnostic for MS
obstructive jaundice
fetal and placenta function
carbs
9. An acid cleaning solution for glassware consists of...
alkaline picrate
glucose
intestinal malabsorption
potassium dichromate in SA
10. 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
65
A1
5
chylomicrons VLDL
11. The glucose level in normal peritoneal fluid should be...
the same as plasma glucose
increased O2 decreased HCO3
one micromole/minute
potassium dichromate in SA
12. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...
<1%
minimize the effects of interference
lipase
A1c
13. One international unit of enzyme activity is the amount of enzyme that - under specified reaction conditions of substrate concentration - pH - and temperature - causes utilization of substrate at the rate of...
1 micromole per minute
spun separated iced and tested immediately
mg/ml
nondiagnostic for MS
14. The Porter-Silber method (phenylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?
act as carriers for ions
1 mol/kg
dihydroxyacetone side chain
acute hepatitis
15. Nephelometers measure light...
testing heparinized plasma
scattered at a right angle
1.9
lead
16. Ninety percent of the copper present in plasma is bound to...
CO2 and pH elevated
HCT
WITHOUT a disease with a negative test
ceruplasmin
17. The main reason for suboptimal drug levels in therapeutic drug monitoring is...
volumetric flask
high carbohydrate diet for 3 days
patient noncompliance
cholesterol normal triglycerides elevated
18. Major actions of angiotensin II include...
a small concentration of APO-B containing lipoproteins after precipitation
increased vasoconstriction
agarose
O2
19. Serum concentrations of vitamin B12 are elevated in...
serum cortisol > 15
CML
nondiagnostic for MS
cancel test
20. In the sweat test - the sweating stimulant is introduced to the skin by application of...
no decrease in serum growth hormone after 90 minutes
electric current
1 mol/kg
carbohydrate hyperalimentation
21. Total iron-binding capacity measures the serum iron transporting capacity of...
transferrin
1 mol/kg
creatine kinase
sodium
22. In familial hypercholesterolemia - the hallmark finding is an elevation of...
LDL
increased O2 decreased HCO3
Temperature is a function of the number of particles in solution
mg/ml
23. Rickets is associated with deficiency of...
methadone
glucose oxidase
diet
D
24. The normal concentration of proteins in cerebrospinal fluid - relative to serum protein - is...
oxalacetate to malate
exposure to CO
<1%
chylomicrons
25. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...
urinary free cortisol
9
specificity
hemolysis
26. The biuret reaction for the analysis of serum protein depends on the number...
20:1
primidone
peptide bonds
hepatobiliary (obstruction?)
27. 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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183
28. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...
BUN increased
ammonia
lead
high carbohydrate diet for 3 days
29. A fresh urine sample is received for "porphyrins" or "porphyria" without further information or specifications. Initial analysis should include...
20:1
2Na + glucose over 20 + BUN over 3
thyroxine
porphyrin and porphobilinogen screen
30. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH
digoxin
glycerol
whole blood can be used
quantitation of label
31. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
multiplied by 4
3500
LDH
serum cortisol > 15
32. Bile acid concentrations are useful to assess...
bicarbonate buffer
check serum for hemolysis
fall in pH - rise in pCO2
hepatobiliary (obstruction?)
33. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
pCO2
maintain colloidal osmotic pressure
1.1
crigler
34. Phenobarbital is a metabolite of...
freezing point
primidone
can be separated into distinct phenotypes
200x affinity for oxygen
35. Most chemical methods for determining total protein utilize this reaction?
biuret
purulent
lactic acidosis
increased vasoconstriction
36. 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...
growth - third trimester of pregnancy
creatine kinase
amylase and lipase
32
37. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
glucose
quantitation of label
prisms and grating
270
38. The primary function of serum albumin in the peripheral blood is to...
M subunit is inactivated
100nmol
trig
maintain colloidal osmotic pressure
39. This elevates carboxyhemoglobin?
show a decrease in glycosylated hgb
obstructive jaundice
exposure to CO
albumin
40. If the correlation coefficient (r) of two variables is zero...
there is an absence of correlation
minimize the effects of interference
Prolactin
draw blood for glucose and discontinue test
41. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
<1%
BUN increased
1.9
chloride
42. A chemiluminescent EIA...
F
increased O2 decreased HCO3
65
is quantitated by the amount of light produced
43. Alkaline phosphatase Slight increase - Aminotransferase Marked increase - Aspartate aminotransferase Marked increase - Alanine gamma-glutamyl transferase Slight increase
scattered at a right angle
creatinine
standard
acute hepatitis
44. In monitoring glomerular function - this test has the highest sensitivity
iron hemochromatosis
creatinine clearance
apoenzyme
O2
45. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
B12 deficiency
beta
alkaline picrate
<1%
46. The Henderson-Hasselbalch equation
freezing point
pH = pKa + log (salt/acid)
check serum for hemolysis
@ 100
47. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus
improving state of metabolic control (as indicated by fructosamine)
iron deficiency anemia
200
sodium
48. Blood was collected in a serum separator tube from a patient who had been fasting since midnight. The time of collection was 7:00 AM. The laboratory test that should be re-collected is...
fetal and placenta function
lead
triglycerides
minimize the effects of interference
49. The unit of measure for a standard solution is...
have a negative charge
20:1
mg/ml
creatinine
50. The anion gap is useful for quality control of laboratory results for...
glucose tolerance test
thyroxine binding globulin
parathyroid hormone
sodium potassium chloride CO2
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