SUBJECTS
|
BROWSE
|
CAREER CENTER
|
POPULAR
|
JOIN
|
LOGIN
Business Skills
|
Soft Skills
|
Basic Literacy
|
Certifications
About
|
Help
|
Privacy
|
Terms
Search
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. In performing a spinal fluid protein determination - the specimen is diluted 1 part spinal fluid to 3 parts saline to obtain a result low enough to measure. To calculate the protein concentration the result must be...
didymium filter
primidone
correct for variations in light intensity
multiplied by 4
2. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...
fresh morning urine for delta-aminolevulinic acid
pilocarpine
faster than gamma
testosterone
3. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...
lactic acidosis
creatine kinase
ionization of carboxyl groups (yielding a net negative charge)
crigler
4. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?
0
acute intermittent porphyria
breast cancer
GLC
5. Which percentage of total serum calcium is nondiffusible protein bound?
emphysema
HPLC analysis of porpobilinogen on 24hr urine
coulometry
40-50
6. Fluctuation of the needle on a coulometric type titrator is most probably due to...
maintain colloidal osmotic pressure
creatine kinase
immunofixation
dirty electrodes
7. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
LDL
4.5
correct for variations in light intensity
BUN increased
8. The method of choice for diagnosis of a protracted attack of porphyria is...
hyperventilation
ionization of carboxyl groups (yielding a net negative charge)
patient noncompliance
HPLC analysis of porpobilinogen on 24hr urine
9. 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?
hepatobiliary (obstruction?)
bicarbonate carbonic acid
phenytoin
5
10. An Rf value of 0.5 in thin-layer chromatography means...
Solute moves half the distance of the solvent front
incorrect aqueous to nonaqueous mixture
high carbohydrate diet for 3 days
CO2 and pH elevated
11. A true statement about high performance liquid chromatography (HPLC) is that it...
40-50
120 minutes
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
without a disease with a negative test result
12. The biologically most active - naturally occuring androgen is...
glass
Mg
testosterone
specimen exposure to light
13. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
A1c
metabolic acidosis
there is an absence of correlation
increase in total circulating T4
14. Analysis of erythrocytes for uroporphyrinogen I synthetase detects...
chylomicrons
glucose oxidase
acute intermittent porphyria
TSH
15. The principle of the occult blood test depends on the...
dirty applicators
electric current
peroxidase-like activity of hemoglobin
LDL
16. The selectivity of an ion-selective electrode is determined by the...
peroxidase-like activity of hemoglobin
properties of the membrane
@ 100
acute intermittent porphyria
17. The major fraction of organic iodine in the circulation is in the form of...
exchange of amino and keto groups
thyroxine
cyclic antidepressants
glucose
18. 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...
corticosterone
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
triglycerides
cholesterol normal triglycerides elevated
19. In the assay of lactate dehydrogenase - this product is actually measured
90%
Mg
340
NADH
20. Phenobarbital is a metabolite of...
creatine kinase
conjugated hyperbilirubinemia - hepatocellular obstruction
primidone
TSH
21. 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
A1
100nmol
ceruplasmin
22. The ability of a procedure to measure only the component(s) it claims to measure is called...
specificity
65
alpha 2 beta
thiamine
23. A person suspected of having metabolic alkalosis would have these laboratory findings
CO2 and pH elevated
hemolysis
turn off
fetal and placenta function
24. This is a regulatory hormone.
beta
parathyroid hormone
carbs
serum aliquots - one heated
25. 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...
incorrect aqueous to nonaqueous mixture
increased O2 decreased HCO3
Calcium - phosphorus
conjugated hyperbilirubinemia - hepatocellular obstruction
26. Most automated blood gas analyzers directly measure...
turn off
GLC
glucose oxidase
pH pCO2 pO2
27. TSH is produced by the...
pituitary
specificity
urobilin
340
28. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
albumin
impaired response to ACTH stimulation
1 mol/kg
lead
29. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
triglycerides
impaired response to ACTH stimulation
tissue and serum levels need to reach equilibrium
accuracy
30. A common cause of respiratory alkalosis is...
HCT
LDL
ceruplasmin
hyperventilation
31. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
glucose tolerance test
respiratory acidosis
porphobilinigen SCREEN
oxalacetate to malate
32. The formula for calculating the amount of moles of a chemical?
270
check serum for hemolysis
A1c
g/MW
33. In the immunoinhibition phase of the CK-MB procedure...
inclusion of smokers and nonsmokers in the study population
M subunit is inactivated
200x affinity for oxygen
dirty applicators
34. The general types of interference in atomic absorption spectrophotometry...
chemical ionization matrix
A1
cysteine
591
35. Most most likely to be ordered in addition to serum calcium to determine the cause of tetany?
pCO2
Mg
the fetus is at risk for respiratory distress
Solute moves half the distance of the solvent front
36. Which blood gas electrode is composed of calomel and glass?
CO2
carbs
pCO2
amylase
37. A low concentrarion of serum phosphorus is commonly found in...
beta
carbohydrate hyperalimentation
methyl alcohol
5 tri 15 cholesterol 50 protein
38. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
pO2 increased HCO3 decreased
BUN increased
sodium potassium chloride CO2
catalyze redox reactions
39. The first step to be taken when attempting to repair a piece of electronic equipment is...
digoxin
CO2 and pH elevated
turn off
dirty applicators
40. In using ion-exchange chromatographicbmethods - falsely increased levels of Hgb A1c will be demonstrated in presence of...
1.9
Hb S
corticosterone
endogenous triglycerides
41. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
Calcium - phosphorus
check serum for hemolysis
decreased lecithin
triglycerides
42. Currently the most common method for specific identification and quantitation of serum barbiturates is...
GLC
porphyrin and porphobilinogen screen
exchange of amino and keto groups
oxalacetate to malate
43. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
ceruplasmin
absorptivity x light path x concentration
creatinine clearance
Solute moves half the distance of the solvent front
44. In the liver - bilirubin is converted to...
low pH
bilirubindiglucuronide
5mg higher
D
45. The most important buffer pair in plasma is the...
bicarbonate carbonic acid
agarose
ionization of carboxyl groups (yielding a net negative charge)
glucose
46. 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...
Temperature is a function of the number of particles in solution
1.9
pCO2
boderline results test should be repeated
47. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...
specificity
prisms and grating
electric current
attaching them to protein molecules
48. In electrophoretic analysis - buffers...
transferrin
Tay-sachs
cyclic antidepressants
act as carriers for ions
49. 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?
65
creatinine
minimize the effects of interference
run a new set of controls
50. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?
LDL
oxalacetate to malate
digoxin
5