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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. TSH is produced by the...
pituitary
CO2
absorptivity x light path x concentration
lithium
2. When taken by a euthyroid individual - oral contraceptives containing estrogens will have this effects on the thyroid function studies
D
GLC
BUN increased
increase in total circulating T4
3. The most sensitive enzymatic indicator for liver damage from ethanol intake is...
GGT
F
pH pCO2 pO2
T4 by RIA
4. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...
properties of the membrane
chloride
HCT
thiamine
5. The Porter-Silber method (phenylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?
parathyroid
40-50
primary hyperparathyroidism
dihydroxyacetone side chain
6. The biuret reaction for the analysis of serum protein depends on the number...
crigler
2-log(T)
peptide bonds
C3 complement
7. 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
absorptivity x light path x concentration
wavelength
Hb S
run a new set of controls
8. Amino acid associated with a sulfhydryl group
metabolic acidosis
cysteine
20:1
acute hepatitis
9. A condition in which erythrocyte protoporphyrin is increased is...
iron deficiency anemia
specificity
sharp cutoff filter
parathyroid
10. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
absorptivity x light path x concentration
no decrease in serum growth hormone after 90 minutes
sharp cutoff filter
crigler
11. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
porphyrin and porphobilinogen screen
a small concentration of APO-B containing lipoproteins after precipitation
sodium potassium chloride CO2
catalyze redox reactions
12. An acid cleaning solution for glassware consists of...
potassium dichromate in SA
specificity
inclusion of smokers and nonsmokers in the study population
chylomicrons VLDL
13. In the liver - bilirubin is converted to...
bilirubindiglucuronide
1.1
thyroxine binding globulin
pituitary
14. The stimulant that causes localized sweating for the sweat test is...
primidone
prisms and grating
pilocarpine
LDH
15. Major actions of angiotensin II include...
2Na + glucose over 20 + BUN over 3
parathyroid hormone
minimize the effects of interference
increased vasoconstriction
16. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
200
chloride
1.9
sodium potassium chloride CO2
17. The TRH (thyrotropin-releasing hormone) stimulation test is useful in assessing...
peptide bonds
hyperthyroidism
atomic absorption
TSH
18. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
creatinine
B12 deficiency
ionization of carboxyl groups (yielding a net negative charge)
LDL
19. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
accuracy
ratio of distance moved by solvent to distance moved by compound
exchange of amino and keto groups
2Na + glucose over 20 + BUN over 3
20. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
adding an acid stabilizer
bicarbonate carbonic acid
chloride
fraction absorbed into systemic circulation
21. 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...
triglycerides
fraction absorbed into systemic circulation
inclusion of smokers and nonsmokers in the study population
amytriptyline 104
22. Stray light can be detected in a spectrophotometer by utilizing a...
thyroxine binding globulin
digoxin
adding an acid stabilizer
sharp cutoff filter
23. The measurement of light scattered by particles in the sample is the principle of...
120 minutes
thymolpthalein monophosphate
nephelometry
have a negative charge
24. In the sweat test - the sweating stimulant is introduced to the skin by application of...
atomic absorption
electric current
cmpds based on molecular weight and size
TSH
25. Serum anion gap is increased in patients with...
increase in total circulating T4
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
lactic acidosis
be able to detect 9/10 simple instrument malfunctions
26. The function of the major lipid components of the very low density lipoproteins (VLDL) is to transport...
act as carriers for ions
endogenous triglycerides
B12 deficiency
Mg
27. A spectrophotometer is being considered for purchase by a small laboratory. This specification reflects the spectral purity of the instrument
cholesterol normal triglycerides elevated
potassium dichromate in SA
BUN increased
band width
28. A patient is admitted to the emergency room in a state of metabolic alkalosis.This would be consistent with this diagnosis?
boderline results test should be repeated
show a decrease in glycosylated hgb
high co2 and hco3
volumetric flask
29. Spectrophotometers isolate a narrow band pass by means of...
prisms and grating
100 nmol
hyperventilation
testing heparinized plasma
30. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
trig
testosterone
exposure to CO
Hb S
31. To ensure an accurate ammonia level result - the specimen should be...
100 nmol
spun separated iced and tested immediately
effluent line is obstructed
LDL
32. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
sample exposed to light
inclusion of smokers and nonsmokers in the study population
fraction absorbed into systemic circulation
crigler
33. A psychiatric patient was experiencing sever depression - but responded to treatment with amitriptyline with no apparent side effects. A blood sample was sent to the laboratory for therapeutic monitoring. Which drug level would be MOST reflective of
incorrect aqueous to nonaqueous mixture
LDL
pH = pKa + log (salt/acid)
amytriptyline 104
34. 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...
1.1
3500
BUN increased
testing heparinized plasma
35. A 45-year-old woman complains of fatigue - heat intolerance - and hair loss. Serum thyroxine and 125I-T3 resin uptake are abnormally low. What test would confirm that this is a pituitary deficiency?
run a new set of controls
CO2 and pH elevated
TSH
occult blood
36. Most automated blood gas analyzers directly measure...
act as carriers for ions
glass
pH pCO2 pO2
conjugated hyperbilirubinemia - hepatocellular obstruction
37. This steroid is an adrenal cortical hormone
corticosterone
respiratory ACIDOSIS
chloride
HCT
38. Thiis serum protein fraction is most likely to be elevated in patients with nephrotic syndrome?
<45
chylomicrons
respiratory acidosis
alpha 2 beta
39. 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...
exchange of amino and keto groups
sample exposed to light
fraction absorbed into systemic circulation
intestinal malabsorption
40. Cerebrospinal fluid for glucose assay should be...
analyzed immediately
glucose tolerance test
occult blood
accuracy
41. 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.
the same as plasma glucose
incorrect aqueous to nonaqueous mixture
591
100 nmol
42. In familial hypercholesterolemia - the hallmark finding is an elevation of...
no decrease in serum growth hormone after 90 minutes
atomic absorption
120 minutes
LDL
43. 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
SD over mean
placenta
heparin
44. 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...
glucose oxidase
32
ratio of distance moved by solvent to distance moved by compound
urinary free cortisol
45. 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
46. Serum haptoglobin...
270
can be separated into distinct phenotypes
whole blood can be used
glucose
47. A breakdown product of hemoglobin is...
respiratory acidosis
bilirubin
TSH
270
48. A sweat chloride result of 55 mEq/L and a sweat sodium of 52 mEq/L were obtained ona patient who has a history of respiratory problems. The bestc interpretation of these results is...
boderline results test should be repeated
acute hepatitis
didymium filter
hyperventilation
49. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...
prostate
thyroxine binding globulin
bilirubindiglucuronide
Solute moves half the distance of the solvent front
50. Lithium therapy is widely used in the treatment of...
manic-depression
attaching them to protein molecules
WITHOUT a disease with a negative test
normal - liver breakdown