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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. Scurvy is associated with deficiency of...
no ice clots bubbles
C
SD over mean
attaching them to protein molecules
2. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?
potassium dichromate in SA
2Na + glucose over 20 + BUN over 3
coulometry
5
3. The osmolality of a urine or serum specimen is measured by a change in the...
freezing point
acute hepatitis
manic-depression
C
4. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH
Temperature is a function of the number of particles in solution
hyperventilation
CML
glycerol
5. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
fresh morning urine for delta-aminolevulinic acid
HDL
albumin
accuracy
6. A pH of 7.0 represents a H+ concentration of...
CO2
be able to detect 9/10 simple instrument malfunctions
<45
100 nmol
7. Cerebrospinal fluid for glucose assay should be...
analyzed immediately
whole blood can be used
can be separated into distinct phenotypes
correct for variations in flame and atomizer
8. Aminotransferase enzymes catalyze the...
the same as plasma glucose
incorrect aqueous to nonaqueous mixture
fresh morning urine for delta-aminolevulinic acid
exchange of amino and keto groups
9. In using ion-exchange chromatographicbmethods - falsely increased levels of Hgb A1c will be demonstrated in presence of...
mg/ml
TSH
bicarbonate buffer
Hb S
10. The ability of a procedure to measure only the component(s) it claims to measure is called...
A1
specificity
inclusion of smokers and nonsmokers in the study population
potassium dichromate in SA
11. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?
5mg higher
1 mol/kg
impaired response to ACTH stimulation
WITHOUT a disease with a negative test
12. This wavelengths is within the ultraviolet rang.
340
prisms and grating
Wilson's disease
improving state of metabolic control (as indicated by fructosamine)
13. 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?
apoenzyme
is quantitated by the amount of light produced
270
Tangier
14. Four children are admitted with malaise - anorexia - and abdominal pain. Further evaluations reveal mild anemia - erythrocyte basophilic stippling - and profound pica habits. Poisoning by which heavy metal is most likely responsible?
analyzed immediately
properties of the membrane
lead
100 nmol
15. A thick white turbid specimen was received in the laboratory labeled as pericardial fluid. A microscopic examination was performed - and the differential included 90% PMNs. The fluid is...
purulent
lead
pH pCO2 pO2
volumetric flask
16. 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...
be able to detect 9/10 simple instrument malfunctions
increased vasoconstriction
primary hyperparathyroidism
chylomicrons
17. The following laboratory results were obtained on arterial blood: Sodium 136 mEq/L pH 7.32 Potassium 4.4 mEq/L PCO2 79 mm Hg Chloride 92 mEq/L Bicarbonate 40 mEq/L These results are most compatible with...
respiratory acidosis
methadone
prevent phosphate interference
porphobilinigen SCREEN
18. The test for adrenal cortical hyperfunction that has the greatest diagnostic sensitivity is measurement of...
WITHOUT a disease with a negative test
urinary free cortisol
obstructive jaundice
TSH
19. Rickets is associated with deficiency of...
high co2 and hco3
D
there is an absence of correlation
4.5
20. A carbonate salt used to control manic-depressive disorders is...
impaired response to ACTH stimulation
inhibitor binds to enzyme at same site as substrate
lithium
chloride
21. In an internal standard flame photometer - the internal standard is used to...
porphyrin and porphobilinogen screen
incorrect aqueous to nonaqueous mixture
correct for variations in flame and atomizer
<1%
22. A person suspected of having metabolic alkalosis would have these laboratory findings
CO2 and pH elevated
albumin
the fetus is at risk for respiratory distress
immunofixation
23. Testing for the diagnosis of lead poisoning should include...
breast cancer
5
sodium potassium chloride CO2
(testing of urine for) delta-am.. acid
24. Maple syrup urine disease is characterized by an increase in this urinary amino acids
CO2 and pH elevated
valine leucine isoleucine
wavelength
specimen exposure to light
25. The unit of measure for a standard solution is...
mg/ml
aldolase
primary hyperparathyroidism
brain
26. The glucose level in normal peritoneal fluid should be...
the same as plasma glucose
patient noncompliance
corticosterone
chylomicrons VLDL
27. A condition in which erythrocyte protoporphyrin is increased is...
hyperthyroidism
Hb S
alpha 2 beta
iron deficiency anemia
28. The formation of estriol in a pregnant woman is dependent on...
thiamine
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
90%
fetal and placenta function
29. In thin layer chromatography - the Rf value for a compound is given by the...
hyperthyroidism
faster than gamma
ratio of distance moved by solvent to distance moved by compound
monitoring the course of a known cancer
30. Detection of carriers of hereditary coproporphyria should include analysis of...
adding an acid stabilizer
remove excess unbound iron
32
fresh morning urine for delta-aminolevulinic acid
31. As part of a hyperlipidemia screening program - the following results were obtained on a 25 year old woman 6 hours after eating:Triglycerides = 260 mg/dLCholesterol = 120 mg/dL - This is the BEST interpretation of these results?
multiplied by 4
cholesterol normal triglycerides elevated
prisms and grating
hemolysis
32. A critically ill patient becomes comatose. The physician believes the coma is due to hepatic failure. The assay most helpful in this diagnosis is...
pituitary
amylase
ammonia
increased O2 decreased HCO3
33. The selectivity of an ion-selective electrode is determined by the...
properties of the membrane
BUN increased
LDH
GGT
34. 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
cyclic antidepressants
L/S ratio > 3.5
bone
35. Magnesium carbonate is added in an iron binding capacity determination in order to...
sodium potassium chloride CO2
NADH
is quantitated by the amount of light produced
remove excess unbound iron
36. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
5mg higher
incorrect aqueous to nonaqueous mixture
trig
Temperature is a function of the number of particles in solution
37. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
nondiagnostic for MS
decreased lecithin
cyclic antidepressants
glucose tolerance test
38. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
glucose
absorptivity x light path x concentration
corticosterone
testosterone
39. The TRH (thyrotropin-releasing hormone) stimulation test is useful in assessing...
hyperthyroidism
M subunit is inactivated
thyroxine
iron hemochromatosis
40. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
catalyze redox reactions
porphobilinigen SCREEN
high carbohydrate diet for 3 days
5
41. Enzymes used in the diagnosis of acute pancreatitis?
amylase and lipase
biuret
urobilin
90%
42. Spectrophotometers isolate a narrow band pass by means of...
HDL
prisms and grating
LDH
1.1
43. The concentration of serum carotene is affected MOST by...
mg/ml
270
diet
lactic acidosis
44. Beriberi is associated with deficiency of...
valine leucine isoleucine
sharp cutoff filter
porphobilinogen screen
thiamine
45. This method employs a highly specific antibody to thyroxine
have a negative charge
prisms and grating
exposure to CO
T4 by RIA
46. A blood gas sample was sent to the lab on ice - and a bubble was present in the syringe. The blood had been exposed to room air for at least 30 minutes. The following change in blood gases occurred...
WITHOUT a disease with a negative test
2-log(T)
increased O2 decreased HCO3
volumetric flask
47. Calcium concentration in the serum is regulated by...
20:1
parathyroid hormone
glucose
specificity
48. Serum anion gap is increased in patients with...
methyl alcohol
Hb S
lactic acidosis
accuracy
49. In the sweat test - the sweating stimulant is introduced to the skin by application of...
obstructive jaundice
electric current
immunofixation
GFR
50. In a double-beam photometer - the additional beam is used to...
measure the total volume
591
porphobilinigen SCREEN
correct for variations in light intensity