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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. If the correlation coefficient (r) of two variables is zero...
bilirubin
there is an absence of correlation
exchange of amino and keto groups
GFR
2. 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?
acid phosphatase
purulent
TSH
nephelometry
3. 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...
no ice clots bubbles
dihydroxyacetone side chain
1 micromole per minute
2Na + glucose over 20 + BUN over 3
4. How many grams of sodium chloride are needed to prepare 1 L of 0.9% normal saline?
9
draw blood for glucose and discontinue test
respiratory ACIDOSIS
alpha 2 beta
5. The following blood gas results were obtained: pH : 7.18 PO2: 86 mm Hg PCO2: 60 mm Hg O2 saturation: 92% HCO3-: 21 mEq/L TCO2: 23 mEq/L Base excess: -8.0 mEq/L The patient's results are compatible with...
testosterone
changes in the fuel
340
emphysema
6. A person suspected of having metabolic alkalosis would have these laboratory findings
hyperventilation
hyperthyroidism
primidone
CO2 and pH elevated
7. Cocaine is metabolized to...
32
benzoylecogine
alpha 2 beta
pH pCO2 pO2
8. The identification of Bence Jones protein is best accomplished by...
glucose oxidase
immunofixation
peroxidase-like activity of hemoglobin
thiamine
9. Spectrophotometers isolate a narrow band pass by means of...
thyroxine binding globulin
Hb S
prisms and grating
coulometry
10. 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
creatinine
brain
elevated lactic acid - elevated pyruvate
porphyrin and porphobilinogen screen
11. Upon development of a thin layer chromatogram for the drug analysis - all drug spots (including the standards) had migrated with the solvent front. The most probable cause for this would be...
340
C3 complement
5 tri 15 cholesterol 50 protein
incorrect aqueous to nonaqueous mixture
12. The first step in analyzing a 24-hour urine specimen for quantitative urine protein is...
freezing point
120 minutes
measure the total volume
GFR
13. 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...
impaired response to ACTH stimulation
O2
carbohydrate hyperalimentation
<45
14. Detection of carriers of hereditary coproporphyria should include analysis of...
fresh morning urine for delta-aminolevulinic acid
GGT
the fetus is at risk for respiratory distress
accuracy
15. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate
aldolase
parathyroid
LDL
prostate
16. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...
5 tri 15 cholesterol 50 protein
pH pCO2 pO2
placenta
HCT
17. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
90%
5
glucose tolerance test
pilocarpine
18. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
Wilson's disease
4.5
manic-depression
enzyme immunoassay
19. If a drug has a half-life of 7 hours - how many doses given at 7-hour intervals does it usually take to achieve a steady state or plateau level?
boderline results test should be repeated
(testing of urine for) delta-am.. acid
chylomicrons
5
20. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
NADH
measures one ion more than others
bicarbonate buffer
binding capacity of thyroxine-binding globulin
21. This is a regulatory hormone.
bicarbonate carbonic acid
acid phosphatase
parathyroid hormone
hyperventilation
22. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
trig
thymolpthalein monophosphate
run a new set of controls
glucose tolerance test
23. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...
correct for variations in light intensity
minimize the effects of interference
creatinine
ionization of carboxyl groups (yielding a net negative charge)
24. A patient had the following serum results: Na+ 140 mEq/L K+ 4.0 mEq/L Glucose 95 mg/dL BUN 10 mg/dL Which osmolality is consistent with these results?
beta
591
pH = pKa + log (salt/acid)
270
25. Amino acid associated with a sulfhydryl group
no ice clots bubbles
LDH
cysteine
120 minutes
26. In the atomic absorption method for calcium - lanthanum is used...
GGT
benzoylecogine
prevent phosphate interference
methyl alcohol
27. A course of instruction is being planned to teach laboratory employees to correct simple malfunctions in selected laboratory instruments. In writing the objectives for this course - this would be most appropriate?
be able to detect 9/10 simple instrument malfunctions
growth - third trimester of pregnancy
270
biuret
28. This method offers the greatest sensitivity for HBsAg testing
check serum for hemolysis
591
enzyme immunoassay
MI
29. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
CO2 and pH elevated
fraction absorbed into systemic circulation
porphobilinogen screen
@ 100
30. A 25-year-old man became nauseated and vomited 90 minutes after receiving a standard 75-g carbohydrate dose for an oral glucose tolerance test. The best course of action is...
without a disease with a negative test result
draw blood for glucose and discontinue test
65
minimize the effects of interference
31. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...
591
acid phosphatase
21-hydroxylase deficiency
fall in pH - rise in pCO2
32. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
1:5
endosmosis
Calcium - phosphorus
respiratory ACIDOSIS
33. Kernicterus is an abnormal accumulation of bilirubin in...
brain
monitoring the course of a known cancer
low pH
chemical ionization matrix
34. An automated method for measuring chloride that generates silver ions in the reaction is...
C
iron deficiency anemia
coulometry
show a decrease in glycosylated hgb
35. The function of the major lipid components of the very low density lipoproteins (VLDL) is to transport...
low pH
bilirubindiglucuronide
endogenous triglycerides
is quantitated by the amount of light produced
36. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
respiratory acidosis
lactic acidosis
<1%
enzyme induction
37. Which blood gas electrode is composed of calomel and glass?
potassium dichromate in SA
CO2
90%
lithium
38. The osmolality of a urine or serum specimen is measured by a change in the...
check serum for hemolysis
3500
correct for variations in flame and atomizer
freezing point
39. An acid cleaning solution for glassware consists of...
Wilson's disease
O2
potassium dichromate in SA
parathyroid
40. Stray light can be detected in a spectrophotometer by utilizing a...
sharp cutoff filter
enzyme immunoassay
be able to detect 9/10 simple instrument malfunctions
measurement of absorbance at 450
41. A patient has the following results: Patient Values : Reference Values: Serum iron 250 ug/dL 60-150 ug/dL TIBC 350 ug/dL 300-35O ug/dL The best conclusion is that this patient has...
iron hemochromatosis
viral hepatitis
chylomicrons
D
42. The protein portion of an enzyme complex is called the...
the same as plasma glucose
CK
analyzed immediately
apoenzyme
43. 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...
corticosterone
32
primary hyperparathyroidism
coulometry
44. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
2Na + glucose over 20 + BUN over 3
minimize the effects of interference
200x affinity for oxygen
wavelength
45. 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...
transferrin
270
LDH
sample exposed to light
46. 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
specimen exposure to light
increased O2 decreased HCO3
591
accuracy
47. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...
hyperthyroidism
<45
properties of the membrane
run a new set of controls
48. 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
<45
peroxidase-like activity of hemoglobin
benzoylecogine
49. The measurement of light scattered by particles in the sample is the principle of...
TSH
nephelometry
patient noncompliance
270
50. Lasting serum phosphate concentration is controlled primarily by the...
parathyroid
electric current
diet
decreased lecithin