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Test your basic knowledge |
Chemistry Certification
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Subject
:
certifications
Instructions:
Answer 50 questions in 15 minutes.
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study here
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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. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...
5
adding an acid stabilizer
BUN increased
run a new set of controls
2. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
65
respiratory ACIDOSIS
properties of the membrane
thiamine
3. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...
whole blood can be used
B12 deficiency
atomic absorption
cyclic antidepressants
4. 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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5. The enzyme that exists chiefly in skeletal muscle - heart - and brain; is grossly elevated in active muscular dystrophy; and rises early in myocardial infarction is...
creatine kinase
transferrin
BUN increased
inhibitor binds to enzyme at same site as substrate
6. Assay of transketolase activity in blood is used to detect deficiency of...
HPLC analysis of porpobilinogen on 24hr urine
thiamine
no decrease in serum growth hormone after 90 minutes
brain
7. The first step to be taken when attempting to repair a piece of electronic equipment is...
binding capacity of thyroxine-binding globulin
triglycerides
increased vasoconstriction
turn off
8. Bioavailability of a drug refers to the...
fraction absorbed into systemic circulation
4.5
agarose
2Na + glucose over 20 + BUN over 3
9. 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?
CO2
acid phosphatase
run a new set of controls
the fetus is at risk for respiratory distress
10. The serum glucose concentration of a diabetic patient undergoing a 2-hour glucose tolerance test should return to the baseline (fasting level) after a minimum of...
120 minutes
urinary free cortisol
testing heparinized plasma
no decrease in serum growth hormone after 90 minutes
11. The identification of Bence Jones protein is best accomplished by...
CO2
immunofixation
breast cancer
glass
12. A pH of 7.0 represents a H+ concentration of...
100 nmol
128
para-hydroxylphenyl...
pituitary
13. The protein portion of an enzyme complex is called the...
pilocarpine
T4 by RIA
high carbohydrate diet for 3 days
apoenzyme
14. Isoenzyme assays are preformed to improve...
oxalacetate to malate
specificity
Tay-sachs
manic-depression
15. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...
HCT
maintain colloidal osmotic pressure
high co2 and hco3
scattered at a right angle
16. Malic dehydrogenase is added to the aspartate aminotransaminase (AST) reaction to catalyze the conversion of...
C
chloride
MI
oxalacetate to malate
17. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?
mg/ml
5mg higher
TSH
fraction absorbed into systemic circulation
18. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
Temperature is a function of the number of particles in solution
0
viral hepatitis
serum cortisol > 15
19. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
whole blood can be used
carbohydrate hyperalimentation
200
enzyme induction
20. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
urinary free cortisol
breast cancer
hyperthyroidism
LDH
21. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
urinary free cortisol
B12 deficiency
multiplied by 4
fraction absorbed into systemic circulation
22. This method offers the greatest sensitivity for HBsAg testing
a small concentration of APO-B containing lipoproteins after precipitation
hyperventilation
dirty electrodes
enzyme immunoassay
23. The general types of interference in atomic absorption spectrophotometry...
peroxidase-like activity of hemoglobin
turn off
alpha 2 beta
chemical ionization matrix
24. This elevates carboxyhemoglobin?
metabolic acidosis
exposure to CO
TSH
properties of the membrane
25. A 9-month-old boy from Israel has gradually lost the ability to sit up and develops seizures. He has an increased amount of a phospholipid called GM2-ganglioside in his neurons - and he lacks the enzyme hexosaminidase A in his leukocytes. These findi
turn off
breast cancer
Tay-sachs
para-hydroxylphenyl...
26. This is a regulatory hormone.
act as carriers for ions
corticosterone
parathyroid hormone
specificity
27. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
prisms and grating
4.5
para-hydroxylphenyl...
pituitary
28. The method of choice for diagnosis of a protracted attack of porphyria is...
analyzed immediately
HPLC analysis of porpobilinogen on 24hr urine
the fetus is at risk for respiratory distress
have a negative charge
29. Specimens for blood gas determination should be drawn into a syringe containing...
hyperthyroidism
porphyrin and porphobilinogen screen
heparin
100 nmol
30. 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...
bicarbonate carbonic acid
triglycerides
C
1.1
31. Scurvy is associated with deficiency of...
chloride
C
parathyroid
apoenzyme
32. The formation of estriol in a pregnant woman is dependent on...
M subunit is inactivated
MI
fetal and placenta function
freezing point
33. The anion gap is useful for quality control of laboratory results for...
BUN increased
sodium potassium chloride CO2
plasma bicarbonate
nephelometry
34. Stray light can be detected in a spectrophotometer by utilizing a...
chylomicrons VLDL
oxalacetate to malate
sharp cutoff filter
591
35. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
chloride
occult blood
thiamine
increased O2 decreased HCO3
36. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
a small concentration of APO-B containing lipoproteins after precipitation
GLC
glucose oxidase
1.9
37. A new method is being evaluated. A recovery experiment is performed with the following results: 0.9 mL serum sample + 0.1 mL H20 = 89 mEq/L 0.9 mL serum sample + 0.1 mL analyte std. @ 800 mEq/L = 161 mEq/L The percent recovery of the added analyt
high co2 and hco3
thyroxine
serum aliquots - one heated
90%
38. In using ion-exchange chromatographicbmethods - falsely increased levels of Hgb A1c will be demonstrated in presence of...
HCT
potassium dichromate in SA
LDL
Hb S
39. In the sweat test - the sweating stimulant is introduced to the skin by application of...
low pH
remove excess unbound iron
prevent phosphate interference
electric current
40. Kernicterus is an abnormal accumulation of bilirubin in...
brain
100nmol
bilirubindiglucuronide
triglycerides
41. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?
thiamine
porphobilinigen SCREEN
breast cancer
beta
42. In the liver - bilirubin is converted to...
be able to detect 9/10 simple instrument malfunctions
bilirubindiglucuronide
GFR
alkaline picrate
43. Technical problems encountered during the collection of an amniotic fluid specimen caused doubt as to whether the specimen was amniotic in origin. This procedure would establish that the fluid is amniotic in origin
Prolactin
fetal and placenta function
creatinine
there is an absence of correlation
44. 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...
high carbohydrate diet for 3 days
increased O2 decreased HCO3
fall in pH - rise in pCO2
methyl alcohol
45. Phenobarbital is a metabolite of...
specificity
carbohydrate hyperalimentation
alkaline picrate
primidone
46. Magnesium carbonate is added in an iron binding capacity determination in order to...
remove excess unbound iron
volumetric flask
peroxidase-like activity of hemoglobin
Prolactin
47. The primary function of serum albumin in the peripheral blood is to...
porphobilinogen synthetase
acid phosphatase
faster than gamma
maintain colloidal osmotic pressure
48. The relative migration rate of proteins on cellulose acetate is based on...
ionic charge
5mg higher
parathyroid
lactic acidosis
49. 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...
breast cancer
purulent
binding capacity of thyroxine-binding globulin
intestinal malabsorption
50. A pH of 7.0 represents a H+ concentration of...
cancel test
one micromole/minute
100nmol
BUN 80
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