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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 most consistent analytical error involved in the routine determination of HDLcholesterol is caused by...
1:5
a small concentration of APO-B containing lipoproteins after precipitation
show a decrease in glycosylated hgb
monitoring the course of a known cancer
2. This steroid is an adrenal cortical hormone
analyzed immediately
bilirubindiglucuronide
changes in the fuel
corticosterone
3. Kernicterus is an abnormal accumulation of bilirubin in...
attaching them to protein molecules
beta
brain
digoxin
4. Most automated blood gas analyzers directly measure...
increased vasoconstriction
acute hepatitis
O2
pH pCO2 pO2
5. A patient with hemolytic anemia will...
oxalacetate to malate
show a decrease in glycosylated hgb
GGT
transferrin
6. Clinical assays for tumor markers are the most important for...
9
one micromole/minute
wavelength
monitoring the course of a known cancer
7. Currently the most common method for specific identification and quantitation of serum barbiturates is...
act as carriers for ions
GLC
exposure to CO
inhibitor binds to enzyme at same site as substrate
8. A pH of 7.0 represents a H+ concentration of...
2-log(T)
100nmol
thiamine
lead
9. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
crigler
128
coulometry
parathyroid
10. Malic dehydrogenase is added to the aspartate aminotransaminase (AST) reaction to catalyze the conversion of...
sodium potassium chloride CO2
methyl alcohol
oxalacetate to malate
measures one ion more than others
11. The anion gap is useful for quality control of laboratory results for...
respiratory ACIDOSIS
sodium potassium chloride CO2
thiamine
200x affinity for oxygen
12. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
cancel test
viral hepatitis
didymium filter
crigler
13. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...
D
improving state of metabolic control (as indicated by fructosamine)
phenytoin
Prolactin
14. This is a regulatory hormone.
SD over mean
cmpds based on molecular weight and size
metabolic acidosis
parathyroid hormone
15. The formula for calculating the amount of moles of a chemical?
g/MW
BUN 80
urobilin
CK
16. A true statement about high performance liquid chromatography (HPLC) is that it...
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
chemical ionization matrix
exposure to CO
bone
17. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
triglycerides
metabolic acidosis
glycerol
testosterone
18. Spectrophotometers isolate a narrow band pass by means of...
porphobilinogen synthetase
chylomicrons
HPLC analysis of porpobilinogen on 24hr urine
prisms and grating
19. The presence of this isoenzymes indicates acute myocardial damage
urobilin
endosmosis
CK-MB
urinary free cortisol
20. Blood received in the laboratory for blood gas analysis must meet these requirements
show a decrease in glycosylated hgb
no ice clots bubbles
cmpds based on molecular weight and size
LDL
21. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
specificity
hyperthyroidism
LDH
lead
22. The regulation of calcium and phosphorus metabolism is accomplished by which gland?
peroxidase-like activity of hemoglobin
parathyroid
viral hepatitis
mg/ml
23. A common cause of respiratory alkalosis is...
C
emphysema
90%
hyperventilation
24. In amniotic fluid - the procedure used to detect Rh isosensitization is...
measurement of absorbance at 450
coulometry
urinary free cortisol
creatinine
25. In the assay of lactate dehydrogenase - this product is actually measured
attaching them to protein molecules
sharp cutoff filter
glucose oxidase
NADH
26. 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...
CK-MB
maintain colloidal osmotic pressure
F
incorrect aqueous to nonaqueous mixture
27. Total iron-binding capacity measures the serum iron transporting capacity of...
acute hepatitis
glycerol
MI
transferrin
28. Serum levels that define hypoglycemia in preterm or low birth weight infants are...
immunofixation
lower than in adults
remove excess unbound iron
sodium potassium chloride CO2
29. The following blood gas results were obtained: pH : 7.18 PO2: 86 mm Hg PCO2: 60 mm Hg O2 saturation: 92% HCO3-: 21 mEq/L TCO2: 23 mEq/L Base excess: -8.0 mEq/L The patient's results are compatible with...
MI
Prolactin
emphysema
transferrin
30. Maple syrup urine disease is characterized by an increase in this urinary amino acids
scattered at a right angle
valine leucine isoleucine
CO2
fraction absorbed into systemic circulation
31. Magnesium carbonate is added in an iron binding capacity determination in order to...
mg/ml
emphysema
hemolysis
remove excess unbound iron
32. A 21-year-old man with nausea - vomiting - and jaundice has the following laboratory findings: Total serum bilirubin level: 8.5 mg/dL (normal - 0-1.0) Conjugated serum bilirubin level: 6.1 mg/dL (normal - 0-0.5) Urine urobilinogen: Increased Fecal u
@ 100
coulometry
fall in pH - rise in pCO2
conjugated hyperbilirubinemia - hepatocellular obstruction
33. About 90% of phenytoin is excreted in the urine as...
increased vasoconstriction
testosterone
be able to detect 9/10 simple instrument malfunctions
para-hydroxylphenyl...
34. A person suspected of having metabolic alkalosis would have these laboratory findings
impaired response to ACTH stimulation
CO2 and pH elevated
270
plasma bicarbonate
35. A blood gas sample was sent to the lab on ice - and a bubble was present in the syringe. The blood had been exposed to room air for at least 30 minutes. The following change in blood gases occurred...
multiplied by 4
M subunit is inactivated
increased O2 decreased HCO3
4.5
36. In electrophoresis of proteins - when the sample is placed in an electric field connected to a buffer of pH 8.6 - all of the proteins...
occult blood
have a negative charge
Hb S
O2
37. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
didymium filter
TSH
albumin
nondiagnostic for MS
38. The following data were obtained from a cellulose acetate protein electrophoresis scan: Albumin area 75 units Gamma globulin area 30 units Total area 180 units Total protein 6.5 g/dL The gamma globulin content in g/dL is...
5mg higher
measures one ion more than others
1.1
(testing of urine for) delta-am.. acid
39. A 24-hour urine specimen (total volume = 1136 mL) is submitted to the laboratory for quantitative urine protein. Calculate the amount of protein excreted per day - if the total protein is 52 mg/dL.
cholesterol normal triglycerides elevated
absorptivity x light path x concentration
591
LDL
40. The most specific enzyme test for acute pancreatitis is...
lipase
hemolysis
without a disease with a negative test result
minimize the effects of interference
41. The most widely employed screening technique for drug abuse is...
TLC
tissue and serum levels need to reach equilibrium
<45
@ 100
42. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
HDL
tissue and serum levels need to reach equilibrium
B12 deficiency
2-log(T)
43. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...
lactic acidosis
21-hydroxylase deficiency
591
urobilin
44. 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
ALP with fresh draw
ratio of distance moved by solvent to distance moved by compound
potassium dichromate in SA
draw blood for glucose and discontinue test
45. What substance gives feces its normal color?
porphobilinogen screen
wavelength
creatinine clearance
urobilin
46. 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
spun separated iced and tested immediately
creatinine
21-hydroxylase deficiency
47. 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...
immunofixation
intestinal malabsorption
turn off
bilirubindiglucuronide
48. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...
adding an acid stabilizer
transferrin
Hb S
GFR
49. The most widely used support medium for electrophoretic separation of lipoproteins is...
agarose
run a new set of controls
pCO2
inclusion of smokers and nonsmokers in the study population
50. Creatinine clearance is used to estimate the...
plasma bicarbonate
run a new set of controls
chloride
GFR