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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. This serum protein migrates with the beta-globulins on cellulose acetate at pH 8.6...
C3 complement
freezing point
thiamine
CML
2. A patient is admitted to the emergency room in a state of metabolic alkalosis.This would be consistent with this diagnosis?
lithium
Prolactin
specificity
high co2 and hco3
3. A blood sample was received from the emergency room with a request for narcotic analysis. The request slip indicated that the patient (a known heroin addict) responded to naloxone administration. The serum was negative for morphine by EIA. What other
methadone
chylomicrons VLDL
Temperature is a function of the number of particles in solution
diet
4. Which percentage of total serum calcium is nondiffusible protein bound?
acute hepatitis
wavelength
40-50
exchange of amino and keto groups
5. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
normal - liver breakdown
fraction absorbed into systemic circulation
enzyme induction
carbs
6. Serum levels that define hypoglycemia in preterm or low birth weight infants are...
fetal and placenta function
amylase and lipase
lower than in adults
prevent phosphate interference
7. The relative migration rate of proteins on cellulose acetate is based on...
ionic charge
respiratory ACIDOSIS
5 tri 15 cholesterol 50 protein
ratio of distance moved by solvent to distance moved by compound
8. Bioavailability of a drug refers to the...
manic-depression
LDL
fraction absorbed into systemic circulation
F
9. A potassium level of 6.8 mEq/L is obtained. Before reporting the results - the first step the technologist should take is to...
check serum for hemolysis
attaching them to protein molecules
sharp fibrinogen peak
heparin
10. 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
bicarbonate carbonic acid
peroxidase-like activity of hemoglobin
conjugated hyperbilirubinemia - hepatocellular obstruction
didymium filter
11. The biologically most active - naturally occuring androgen is...
prostate
scattered at a right angle
check serum for hemolysis
testosterone
12. In the sweat test - the sweating stimulant is introduced to the skin by application of...
porphobilinogen screen
emphysema
electric current
agarose
13. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...
urinary free cortisol
peroxidase-like activity of hemoglobin
pO2 increased HCO3 decreased
alpha 2 beta
14. Turbidity in serum suggests elevation of...
chylomicrons
5 tri 15 cholesterol 50 protein
multiplied by 4
porphobilinogen synthetase
15. This chemical determination may be of help in establishing the presence of seminal fluid
MI
acid phosphatase
a small concentration of APO-B containing lipoproteins after precipitation
iron deficiency anemia
16. A patient with hemolytic anemia will...
fraction absorbed into systemic circulation
increased O2 decreased HCO3
show a decrease in glycosylated hgb
diet
17. 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...
pH pCO2 pO2
CML
primary hyperparathyroidism
21-hydroxylase deficiency
18. The biuret reaction for the analysis of serum protein depends on the number...
TSH
BUN increased
apoenzyme
peptide bonds
19. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
normal - liver breakdown
serum aliquots - one heated
attaching them to protein molecules
impaired response to ACTH stimulation
20. To ensure an accurate ammonia level result - the specimen should be...
dirty applicators
prostate
spun separated iced and tested immediately
1.1
21. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...
elevated lactic acid - elevated pyruvate
the fetus is at risk for respiratory distress
C3 complement
hemolysis
22. 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...
intestinal malabsorption
peroxidase-like activity of hemoglobin
5 tri 15 cholesterol 50 protein
1 mol/kg
23. Hydrogen ion concentration (pH) in blood is usually determined by means of these electrodes?
C3 complement
glass
F
ceruplasmin
24. In developing the reference for a new EIA for CEA - the range for the normal population was broader than that published by the vendor. Controls are acceptable with a narrow coefficient of variation. This may be explained by...
accuracy
SD over mean
inclusion of smokers and nonsmokers in the study population
M subunit is inactivated
25. The most widely used support medium for electrophoretic separation of lipoproteins is...
thyroxine
measures one ion more than others
low pH
agarose
26. Amino acid associated with a sulfhydryl group
GGT
cysteine
thyroxine binding globulin
growth - third trimester of pregnancy
27. An automated CK assay gives a reading that is above the limits of linearity. A dilution of the serum sample is made by adding 1 mL of serum to 9 mL of water. The instrument now rew 350 U/L. The correct report on the undiluted serum should be...
3500
hemolysis
measures one ion more than others
cyclic antidepressants
28. Fluctuation of the needle on a coulometric type titrator is most probably due to...
no ice clots bubbles
parathyroid hormone
dirty electrodes
conjugated hyperbilirubinemia - hepatocellular obstruction
29. Stray light can be detected in a spectrophotometer by utilizing a...
faster than gamma
5mg higher
sharp cutoff filter
properties of the membrane
30. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...
adding an acid stabilizer
standard
diet
BUN increased
31. When taken by a euthyroid individual - oral contraceptives containing estrogens will have this effects on the thyroid function studies
increase in total circulating T4
T4 by RIA
atomic absorption
CK
32. Detection of carriers of hereditary coproporphyria should include analysis of...
120 minutes
improving state of metabolic control (as indicated by fructosamine)
exposure to CO
fresh morning urine for delta-aminolevulinic acid
33. Specimens for blood gas determination should be drawn into a syringe containing...
1:5
4.5
TLC
heparin
34. Serum haptoglobin...
NADH
can be separated into distinct phenotypes
21-hydroxylase deficiency
specificity
35. 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...
binding capacity of thyroxine-binding globulin
standard
Mg
metabolic acidosis
36. 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
90%
alpha 2 beta
pCO2
1:5
37. A fresh urine sample is received for "porphyrins" or "porphyria" without further information or specifications. Initial analysis should include...
porphyrin and porphobilinogen screen
cancel test
dihydroxyacetone side chain
hyperthyroidism
38. Before unconjugated bilirubin can react with Ehrlich's diazo reagent - this must be added
methyl alcohol
whole blood can be used
conjugated hyperbilirubinemia - hepatocellular obstruction
correct for variations in flame and atomizer
39. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?
whole blood can be used
enzyme induction
5mg higher
atomic absorption
40. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?
GFR
draw blood for glucose and discontinue test
intestinal malabsorption
BUN 80
41. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
specimen exposure to light
B12 deficiency
immunofixation
turn off
42. Diagnostic specificity is defined as the percentage of individuals...
without a disease with a negative test result
cmpds based on molecular weight and size
high carbohydrate diet for 3 days
beta
43. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
1.9
serum aliquots - one heated
absorptivity x light path x concentration
methadone
44. The first step in analyzing a 24-hour urine specimen for quantitative urine protein is...
LDL
measure the total volume
turn off
potassium dichromate in SA
45. TSH is produced by the...
pituitary
without a disease with a negative test result
chloride
beta
46. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
WITHOUT a disease with a negative test
didymium filter
bilirubin
iron deficiency anemia
47. What substance gives feces its normal color?
4.5
urobilin
creatinine
pH pCO2 pO2
48. On immunoassays using enzyme-labeled antibodies or antigens: ___________ can be carried out with a spectrophotometer
1 micromole per minute
oxalacetate to malate
quantitation of label
bicarbonate buffer
49. An Rf value of 0.5 in thin-layer chromatography means...
HPLC analysis of porpobilinogen on 24hr urine
Solute moves half the distance of the solvent front
iron hemochromatosis
ionization of carboxyl groups (yielding a net negative charge)
50. A pH of 7.0 represents a H+ concentration of...
9
100 nmol
dirty electrodes
parathyroid