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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. In electrophoretic analysis - buffers...
potassium dichromate in SA
act as carriers for ions
lead
wavelength
2. Patients with Cushing's syndrome exhibit...
bicarbonate carbonic acid
serum cortisol > 15
methyl alcohol
run a new set of controls
3. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?
alpha 2 beta
thiamine
breast cancer
BUN 80
4. Rickets is associated with deficiency of...
respiratory ACIDOSIS
2Na + glucose over 20 + BUN over 3
A1
D
5. The T3 resin uptake test is a measure of...
serum aliquots - one heated
binding capacity of thyroxine-binding globulin
ionization of carboxyl groups (yielding a net negative charge)
digoxin
6. The hemoglobin that is resistant to alkali (KOH) denaturation is...
CO2
270
BUN 80
F
7. A serum sample was assayed for bilirubin at 10 AM and the result was 12 mg/dL. The same sample was retested at 3 PM. The result now is 8 mg/dL. The most likely explanation for this discrepancy is...
iron deficiency anemia
thyroxine
absorptivity x light path x concentration
sample exposed to light
8. Creatinine clearance is used to estimate the...
methyl alcohol
CO2 and pH elevated
GFR
Wilson's disease
9. If the correlation coefficient (r) of two variables is zero...
exposure to CO
measurement of absorbance at 450
valine leucine isoleucine
there is an absence of correlation
10. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
intestinal malabsorption
nondiagnostic for MS
Hb S
viral hepatitis
11. 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...
lactic acidosis
coulometry
changes in the fuel
SD over mean
12. 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
21-hydroxylase deficiency
65
conjugated hyperbilirubinemia - hepatocellular obstruction
@ 100
13. Nephelometers measure light...
nephelometry
5 tri 15 cholesterol 50 protein
scattered at a right angle
1.9
14. An acid cleaning solution for glassware consists of...
F
a small concentration of APO-B containing lipoproteins after precipitation
potassium dichromate in SA
lead
15. A one MOLAL solution is equivalent to...
measures one ion more than others
metabolic acidosis
high co2 and hco3
1 mol/kg
16. Most automated blood gas analyzers directly measure...
thyroxine
pH pCO2 pO2
bone
C
17. 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...
dirty applicators
1 micromole per minute
specificity
hemolysis
18. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
MI
albumin
dirty applicators
creatinine clearance
19. Bile acid concentrations are useful to assess...
hepatobiliary (obstruction?)
32
Tay-sachs
lithium
20. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...
catalyze redox reactions
urinary free cortisol
improving state of metabolic control (as indicated by fructosamine)
didymium filter
21. 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
can be separated into distinct phenotypes
200x affinity for oxygen
normal - liver breakdown
22. An electrode has a silver/silver chloride anode and a platinum wire cathode. It is suspended in KCl solution and separated from the blood to be analyzed by a selectively permeable membrane. Such an electrode is used to measure...
O2
lead
CK-MB
purulent
23. The identification of Bence Jones protein is best accomplished by...
albumin
immunofixation
HCT
T4 by RIA
24. The preparation of a patient for standard tolerance testing should include...
high carbohydrate diet for 3 days
atomic absorption
1.1
carbs
25. In electrophoresis of serum proteins - arifacts at the application point are most frequently caused by...
200x affinity for oxygen
dirty applicators
increased O2 decreased HCO3
C3 complement
26. 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
there is an absence of correlation
lower than in adults
dirty electrodes
ALP with fresh draw
27. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
glucose
draw blood for glucose and discontinue test
NADH
270
28. Coulometry is used to measure...
thyroxine binding globulin
chloride
<45
iron hemochromatosis
29. 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...
hepatobiliary (obstruction?)
electric current
changes in the fuel
obstructive jaundice
30. A potentiometric electrode that measures an analyte that passes through a selectively premeable membrane and rapidly enters into an equilibrium with an electrolyte solution is...
pCO2
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
carbs
diet
31. In the assay of lactate dehydrogenase - this product is actually measured
remove excess unbound iron
NADH
Tangier
brain
32. A common cause of respiratory alkalosis is...
hyperventilation
the same as plasma glucose
triglycerides
analyzed immediately
33. The general types of interference in atomic absorption spectrophotometry...
T4 by RIA
1.9
chemical ionization matrix
respiratory acidosis
34. Currently the most common method for specific identification and quantitation of serum barbiturates is...
5 tri 15 cholesterol 50 protein
1.9
GLC
urobilin
35. In performing a spinal fluid protein determination - the specimen is diluted 1 part spinal fluid to 3 parts saline to obtain a result low enough to measure. To calculate the protein concentration the result must be...
multiplied by 4
volumetric flask
there is an absence of correlation
remove excess unbound iron
36. 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...
show a decrease in glycosylated hgb
1.1
run a new set of controls
primidone
37. Hydrogen ion concentration (pH) in blood is usually determined by means of these electrodes?
glass
TSH
increased vasoconstriction
340
38. Gas chromatography with the nitrogen/phosphorus detector is the most commonly used technique for the analysis of...
cyclic antidepressants
F
acute intermittent porphyria
porphyrin and porphobilinogen screen
39. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
sodium potassium chloride CO2
impaired response to ACTH stimulation
<1%
D
40. This applies to cryoscopic osmometry
albumin
phenytoin
Temperature is a function of the number of particles in solution
ammonia
41. How many grams of sodium chloride are needed to prepare 1 L of 0.9% normal saline?
1.9
9
1 mol/kg
21-hydroxylase deficiency
42. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
low pH
no decrease in serum growth hormone after 90 minutes
CO2 and pH elevated
5
43. This wavelengths is within the ultraviolet rang.
BUN increased
glucose oxidase
340
CO2
44. The protein portion of an enzyme complex is called the...
adding an acid stabilizer
impaired response to ACTH stimulation
1.1
apoenzyme
45. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...
minimize the effects of interference
obstructive jaundice
ceruplasmin
5 tri 15 cholesterol 50 protein
46. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?
amytriptyline 104
Mg
thyroxine
5
47. This steroid is an adrenal cortical hormone
TSH
corticosterone
BUN increased
bicarbonate carbonic acid
48. The formation of estriol in a pregnant woman is dependent on...
fetal and placenta function
peptide bonds
para-hydroxylphenyl...
parathyroid
49. In respiratory acidosis - a compensatory mechanism is the increase in...
CML
atomic absorption
plasma bicarbonate
NADH
50. A pH of 7.0 represents a H+ concentration of...
100nmol
incorrect aqueous to nonaqueous mixture
alpha 2 beta
cyclic antidepressants