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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. Analysis of erythrocytes for uroporphyrinogen I synthetase detects...
3500
breast cancer
acute intermittent porphyria
potassium dichromate in SA
2. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
no decrease in serum growth hormone after 90 minutes
glucose tolerance test
TSH
sodium potassium chloride CO2
3. Serum levels that define hypoglycemia in preterm or low birth weight infants are...
lower than in adults
A1
viral hepatitis
glucose oxidase
4. This elevates carboxyhemoglobin?
NADH
HPLC analysis of porpobilinogen on 24hr urine
placenta
exposure to CO
5. Serum anion gap is increased in patients with...
lactic acidosis
CO2 and pH elevated
exposure to CO
CO2
6. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
parathyroid hormone
cholesterol normal triglycerides elevated
5 tri 15 cholesterol 50 protein
4.5
7. An automated method for measuring chloride that generates silver ions in the reaction is...
TSH
accuracy
lead
coulometry
8. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
low pH
5
trig
porphobilinogen screen
9. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH
lower than in adults
correct for variations in flame and atomizer
glycerol
urinary free cortisol
10. In the atomic absorption method for calcium - lanthanum is used...
para-hydroxylphenyl...
tissue and serum levels need to reach equilibrium
prevent phosphate interference
crigler
11. Ion selective electrodes are called selective rather than specific because they actually measure the...
measures one ion more than others
CML
didymium filter
nephelometry
12. 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...
prisms and grating
band width
100nmol
low pH
13. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
<1%
cysteine
metabolic acidosis
GFR
14. Bile acid concentrations are useful to assess...
Wilson's disease
apoenzyme
hepatobiliary (obstruction?)
trig
15. The formula for calculating the amount of moles of a chemical?
g/MW
65
hepatobiliary (obstruction?)
T4 by RIA
16. 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?
ALP with fresh draw
5 tri 15 cholesterol 50 protein
aldolase
be able to detect 9/10 simple instrument malfunctions
17. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
correct for variations in flame and atomizer
turn off
chloride
BUN increased
18. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...
electric current
5
minimize the effects of interference
pilocarpine
19. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...
<45
check serum for hemolysis
lower than in adults
attaching them to protein molecules
20. The method of choice for diagnosis of a protracted attack of porphyria is...
sodium
lipase
breast cancer
HPLC analysis of porpobilinogen on 24hr urine
21. Diagnostic specificity is defined as the percentage of individuals...
dirty applicators
enzyme immunoassay
increase in total circulating T4
without a disease with a negative test result
22. A 45-year-old woman has a fasting serum glucose concentration of 95 mg/dL and a 2-hour postprandial glucose concentration of 105 mg/dL. The statement that best describes this patient's fasting serum glucose concentration is...
normal - liver breakdown
chemical ionization matrix
one micromole/minute
boderline results test should be repeated
23. The serum glucose concentration of a diabetic patient undergoing a 2-hour glucose tolerance test should return to the baseline (fasting level) after a minimum of...
@ 100
120 minutes
dirty electrodes
quantitation of label
24. Diagnostic specificity is defined as the percentage of individuals...
WITHOUT a disease with a negative test
whole blood can be used
Hb S
occult blood
25. The most heat labile fraction of alkaline phosphatase is obtained from...
270
acid phosphatase
21-hydroxylase deficiency
bone
26. An electrophoretic separation of lactate dehydrogenase isoenzymes that demonstrates an elevation in LD-l and LD-2 in a "flipped" pattern is consistent with...
immunofixation
MI
increased vasoconstriction
CO2
27. In the liver - bilirubin is converted to...
heparin
5
the same as plasma glucose
bilirubindiglucuronide
28. This diseases results from a familial absence of high-density lioprotein
potassium dichromate in SA
Tangier
CK
respiratory ACIDOSIS
29. When myocardial infarction occurs - the first enzyme to become elevated is...
CK
can be separated into distinct phenotypes
para-hydroxylphenyl...
B12 deficiency
30. The methodology based on the amount of energy absorbed by a subtance as a function of its concentration and using a specific source of the same material as the substance analyzed is...
atomic absorption
MI
spun separated iced and tested immediately
4.5
31. Serum haptoglobin...
catalyze redox reactions
BUN increased
can be separated into distinct phenotypes
valine leucine isoleucine
32. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...
5
improving state of metabolic control (as indicated by fructosamine)
Hb S
faster than gamma
33. The hemoglobin that is resistant to alkali (KOH) denaturation is...
adding an acid stabilizer
sample exposed to light
occult blood
F
34. A carbonate salt used to control manic-depressive disorders is...
lithium
adding an acid stabilizer
volumetric flask
alkaline picrate
35. In respiratory acidosis - a compensatory mechanism is the increase in...
lipase
multiplied by 4
plasma bicarbonate
parathyroid
36. A pH of 7.0 represents a H+ concentration of...
albumin
CK-MB
chylomicrons
100nmol
37. An acid cleaning solution for glassware consists of...
potassium dichromate in SA
urobilin
100 nmol
sharp cutoff filter
38. Creatinine clearance is used to estimate the...
GFR
pCO2
serum cortisol > 15
exposure to CO
39. The osmolality of a urine or serum specimen is measured by a change in the...
TSH
electric current
L/S ratio > 3.5
freezing point
40. Total iron-binding capacity measures the serum iron transporting capacity of...
act as carriers for ions
dirty applicators
100 nmol
transferrin
41. Which two conditions can "physiologically" elevate serum alkaline phosphatase?
Prolactin
emphysema
growth - third trimester of pregnancy
Wilson's disease
42. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
impaired response to ACTH stimulation
didymium filter
cysteine
properties of the membrane
43. Clinical assays for tumor markers are the most important for...
monitoring the course of a known cancer
HDL
40-50
effluent line is obstructed
44. Major actions of angiotensin II include...
creatinine
attaching them to protein molecules
hepatobiliary (obstruction?)
increased vasoconstriction
45. 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?
270
thiamine
CK
hemolysis
46. The most important buffer pair in plasma is the...
D
bicarbonate carbonic acid
high carbohydrate diet for 3 days
draw blood for glucose and discontinue test
47. 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...
have a negative charge
standard
chylomicrons VLDL
prostate
48. 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...
triglycerides
WITHOUT a disease with a negative test
591
monitoring the course of a known cancer
49. A patient in her 33rd week of pregnancy is hospitalized with toxemia. Her doctor would like to deliver the baby early because the toxemia is becoming more severe. The baby's best chance of delivery without respiratory distress due to lung immaturity
turn off
65
L/S ratio > 3.5
carbs
50. Fluctuation of the needle on a coulometric type titrator is most probably due to...
dirty electrodes
inhibitor binds to enzyme at same site as substrate
CO2
catalyze redox reactions
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