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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. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
trig
CK
placenta
WITHOUT a disease with a negative test
2. Bioavailability of a drug refers to the...
TLC
fraction absorbed into systemic circulation
coulometry
transferrin
3. The following results were obtained in a creatinine clearance evaluation: Urine concentration 84 mg/dL Urine volume 1440 mL/24 hr Serum concentration 1.4 mg/dL Body surface area 1.60 m2 (average = 1.73 m2) The creatinine cle~trance in mL/min is...
65
catalyze redox reactions
4.5
aldolase
4. After a difficult venipuncture requiring prolonged application of the tourniquet - the serum K+ was found to be 6.8 mEq/L. The best course of action is to...
cancel test
parathyroid hormone
ionization of carboxyl groups (yielding a net negative charge)
run a new set of controls
5. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
5
metabolic acidosis
act as carriers for ions
enzyme immunoassay
6. In the Jaffe reaction - creatine reacts with...
bilirubin
alkaline picrate
one micromole/minute
A1
7. A common cause of respiratory alkalosis is...
Tay-sachs
hyperventilation
sodium potassium chloride CO2
run a new set of controls
8. The T3 resin uptake test is a measure of...
remove excess unbound iron
cholesterol normal triglycerides elevated
binding capacity of thyroxine-binding globulin
beta
9. The presence of this isoenzymes indicates acute myocardial damage
maintain colloidal osmotic pressure
prostate
CK-MB
chloride
10. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
enzyme induction
changes in the fuel
3500
SD over mean
11. A technician is asked by the supervisor to prepare a standard solution from the stock standard. What is the glassware of choice for this solution?
act as carriers for ions
volumetric flask
WITHOUT a disease with a negative test
lipase
12. In a double-beam photometer - the additional beam is used to...
brain
band width
Mg
correct for variations in light intensity
13. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances
nondiagnostic for MS
fresh morning urine for delta-aminolevulinic acid
be able to detect 9/10 simple instrument malfunctions
atomic absorption
14. An automated method for measuring chloride that generates silver ions in the reaction is...
coulometry
bilirubin
enzyme immunoassay
specimen exposure to light
15. The biuret reaction for the analysis of serum protein depends on the number...
peptide bonds
standard
(testing of urine for) delta-am.. acid
120 minutes
16. Detection of carriers of hereditary coproporphyria should include analysis of...
glucose tolerance test
lipase
fresh morning urine for delta-aminolevulinic acid
@ 100
17. The greatest activities of serum AST and ALT are seen in...
mg/ml
decreased lecithin
acute hepatitis
apoenzyme
18. In competitive inhibition of an enzyme reaction the...
inhibitor binds to enzyme at same site as substrate
fraction absorbed into systemic circulation
mg/ml
HCT
19. Coulometry is used to measure...
SD over mean
chloride
patient noncompliance
brain
20. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
check serum for hemolysis
chloride
occult blood
bicarbonate buffer
21. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...
2-log(T)
potassium dichromate in SA
atomic absorption
minimize the effects of interference
22. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...
thyroxine binding globulin
faster than gamma
incorrect aqueous to nonaqueous mixture
didymium filter
23. This elevates carboxyhemoglobin?
alkaline picrate
591
exposure to CO
standard
24. The following bilirubin results are obtained on a patient: Day 1: 4.3 mg/dL Day 4: 2.2 mg/dL Day 2: 4.6 mg/dL Day 5: 4.4 mg/dL Day 3: 4.5 mg/dL Day 6: 4.5 mg/dL - Given that the controls were within range each day - what is a probable explanation for
atomic absorption
sample exposed to light
specimen exposure to light
GFR
25. An electrophoretic separation of lactate dehydrogenase isoenzymes that demonstrates an elevation in LD-l and LD-2 in a "flipped" pattern is consistent with...
1:5
MI
5
Mg
26. Unless blood gas measurements are made immediately after sampling - in vitro glycolysis of the blood causes a...
fall in pH - rise in pCO2
sodium potassium chloride CO2
peptide bonds
32
27. 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?
serum aliquots - one heated
BUN increased
TSH
respiratory acidosis
28. The main reason for suboptimal drug levels in therapeutic drug monitoring is...
patient noncompliance
endogenous triglycerides
breast cancer
lower than in adults
29. Assay of transketolase activity in blood is used to detect deficiency of...
porphobilinigen SCREEN
spun separated iced and tested immediately
thiamine
Solute moves half the distance of the solvent front
30. A fasting serum sample from an asymptomatic 43-year-old woman is examined visually chemically with the following results: Initial appearance of serum: Milky Appearance of serum after overnight refrigeration: Cream layer over turbid serum Triglyceri
Hb S
inclusion of smokers and nonsmokers in the study population
chylomicrons VLDL
iron hemochromatosis
31. Serum haptoglobin...
prisms and grating
can be separated into distinct phenotypes
absorptivity x light path x concentration
monitoring the course of a known cancer
32. In thin layer chromatography - the Rf value for a compound is given by the...
CML
65
ratio of distance moved by solvent to distance moved by compound
intestinal malabsorption
33. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...
lipase
hemolysis
thymolpthalein monophosphate
immunofixation
34. Blood was collected in a serum separator tube from a patient who had been fasting since midnight. The time of collection was 7:00 AM. The laboratory test that should be re-collected is...
nephelometry
triglycerides
40-50
draw blood for glucose and discontinue test
35. A 68-year-old man arrives in the emergency room with a glucose level of 722 mg/dL and serum acetone of 4+ undiluted. An arterial blood gas from this patient is likely to indicate...
bicarbonate carbonic acid
iron deficiency anemia
respiratory ACIDOSIS
low pH
36. The most heat labile fraction of alkaline phosphatase is obtained from...
analyzed immediately
g/MW
bone
didymium filter
37. The stimulant that causes localized sweating for the sweat test is...
Prolactin
pilocarpine
O2
HCT
38. 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...
CK-MB
lactic acidosis
3500
impaired response to ACTH stimulation
39. Stray light can be detected in a spectrophotometer by utilizing a...
(testing of urine for) delta-am.. acid
9
pH = pKa + log (salt/acid)
sharp cutoff filter
40. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
nondiagnostic for MS
pO2 increased HCO3 decreased
primidone
trig
41. The normal concentration of proteins in cerebrospinal fluid - relative to serum protein - is...
agarose
improving state of metabolic control (as indicated by fructosamine)
<1%
freezing point
42. A stool specimen that appears black and tarry should be tested for the presence of...
HCT
NADH
5mg higher
occult blood
43. The identification of Bence Jones protein is best accomplished by...
apoenzyme
immunofixation
parathyroid
parathyroid hormone
44. Testing for the diagnosis of lead poisoning should include...
mg/ml
(testing of urine for) delta-am.. acid
quantitation of label
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
45. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...
the fetus is at risk for respiratory distress
ammonia
32
porphobilinigen SCREEN
46. The formation of estriol in a pregnant woman is dependent on...
fetal and placenta function
no ice clots bubbles
Temperature is a function of the number of particles in solution
pituitary
47. Fluctuation of the needle on a coulometric type titrator is most probably due to...
primidone
mg/ml
dirty electrodes
breast cancer
48. This method employs a highly specific antibody to thyroxine
monitoring the course of a known cancer
exposure to CO
T4 by RIA
SD over mean
49. This serum protein migrates with the beta-globulins on cellulose acetate at pH 8.6...
there is an absence of correlation
C3 complement
monitoring the course of a known cancer
band width
50. 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...
the fetus is at risk for respiratory distress
glass
inclusion of smokers and nonsmokers in the study population
LDL