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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. Analysis of erythrocytes for uroporphyrinogen I synthetase detects...
acute intermittent porphyria
ratio of distance moved by solvent to distance moved by compound
urobilin
dirty applicators
2. 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?
check serum for hemolysis
peptide bonds
turn off
be able to detect 9/10 simple instrument malfunctions
3. 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...
BUN 80
multiplied by 4
5
SD over mean
4. The glucose level in normal peritoneal fluid should be...
transferrin
the same as plasma glucose
1.1
thyroxine binding globulin
5. On immunoassays using enzyme-labeled antibodies or antigens: ___________ can be carried out with a spectrophotometer
adding an acid stabilizer
cholesterol normal triglycerides elevated
quantitation of label
faster than gamma
6. In the Jaffe reaction - creatine reacts with...
faster than gamma
agarose
para-hydroxylphenyl...
alkaline picrate
7. Phenobarbital is a metabolite of...
5
CO2
respiratory acidosis
primidone
8. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
urobilin
viral hepatitis
monitoring the course of a known cancer
WITHOUT a disease with a negative test
9. The biologically most active - naturally occuring androgen is...
atomic absorption
without a disease with a negative test result
beta
testosterone
10. The Henderson-Hasselbalch equation
serum aliquots - one heated
pilocarpine
pH = pKa + log (salt/acid)
bicarbonate carbonic acid
11. A common cause of a falsely increased LD1 fraction of lactic dehydrogenase is...
hemolysis
ammonia
is quantitated by the amount of light produced
there is an absence of correlation
12. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
band width
albumin
g/MW
the same as plasma glucose
13. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...
chylomicrons
immunofixation
exposure to CO
ionization of carboxyl groups (yielding a net negative charge)
14. A pH of 7.0 represents a H+ concentration of...
100nmol
GLC
monitoring the course of a known cancer
1:5
15. In electrophoresis of serum proteins - arifacts at the application point are most frequently caused by...
pO2 increased HCO3 decreased
dirty applicators
without a disease with a negative test result
alkaline picrate
16. 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...
heparin
Prolactin
O2
be able to detect 9/10 simple instrument malfunctions
17. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
changes in the fuel
40-50
B12 deficiency
D
18. Beriberi is associated with deficiency of...
urobilin
thiamine
testosterone
endosmosis
19. 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...
triglycerides
acute intermittent porphyria
high carbohydrate diet for 3 days
emphysema
20. A person suspected of having metabolic alkalosis would have these laboratory findings
A1c
CO2 and pH elevated
65
maintain colloidal osmotic pressure
21. A chemiluminescent EIA...
fall in pH - rise in pCO2
trig
conjugated hyperbilirubinemia - hepatocellular obstruction
is quantitated by the amount of light produced
22. 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...
1 micromole per minute
is quantitated by the amount of light produced
boderline results test should be repeated
C
23. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
standard
apoenzyme
100nmol
didymium filter
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?
270
thyroxine binding globulin
trig
LDL
25. The relative migration rate of proteins on cellulose acetate is based on...
ionic charge
improving state of metabolic control (as indicated by fructosamine)
purulent
the fetus is at risk for respiratory distress
26. Which percentage of total serum calcium is nondiffusible protein bound?
act as carriers for ions
oxalacetate to malate
40-50
hyperventilation
27. 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...
pO2 increased HCO3 decreased
NADH
chemical ionization matrix
one micromole/minute
28. A 21-year-old man with nausea - vomiting - and jaundice has the following laboratory findings: Total serum bilirubin level: 8.5 mg/dL (normal - 0-1.0) Conjugated serum bilirubin level: 6.1 mg/dL (normal - 0-0.5) Urine urobilinogen: Increased Fecal u
wavelength
conjugated hyperbilirubinemia - hepatocellular obstruction
CO2
analyzed immediately
29. 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
dihydroxyacetone side chain
chylomicrons VLDL
peptide bonds
CML
30. 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?
Tangier
fall in pH - rise in pCO2
0
cholesterol normal triglycerides elevated
31. The different water content of erythrocytes and plasma makes true glucose concentrations in whole blood a function of the...
HCT
bilirubindiglucuronide
absorptivity x light path x concentration
GGT
32. Scurvy is associated with deficiency of...
SD over mean
(testing of urine for) delta-am.. acid
C
bone
33. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
A1
endogenous triglycerides
acute hepatitis
decreased lecithin
34. If the correlation coefficient (r) of two variables is zero...
amylase and lipase
nephelometry
90%
there is an absence of correlation
35. A spectrophotometer is being considered for purchase by a small laboratory. This specification reflects the spectral purity of the instrument
incorrect aqueous to nonaqueous mixture
electric current
band width
HDL
36. In respiratory acidosis - a compensatory mechanism is the increase in...
128
Tay-sachs
pituitary
plasma bicarbonate
37. In competitive inhibition of an enzyme reaction the...
multiplied by 4
acute intermittent porphyria
inhibitor binds to enzyme at same site as substrate
dihydroxyacetone side chain
38. In a double-beam photometer - the additional beam is used to...
primidone
pO2 increased HCO3 decreased
faster than gamma
correct for variations in light intensity
39. Alkaline phosphatase Slight increase - Aminotransferase Marked increase - Aspartate aminotransferase Marked increase - Alanine gamma-glutamyl transferase Slight increase
acute hepatitis
methyl alcohol
lipase
cmpds based on molecular weight and size
40. Diagnostic specificity is defined as the percentage of individuals...
WITHOUT a disease with a negative test
elevated lactic acid - elevated pyruvate
dihydroxyacetone side chain
4.5
41. Diagnostic specificity is defined as the percentage of individuals...
without a disease with a negative test result
cmpds based on molecular weight and size
act as carriers for ions
chloride
42. 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...
porphyrin and porphobilinogen screen
monitoring the course of a known cancer
creatine kinase
120 minutes
43. 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?
impaired response to ACTH stimulation
nephelometry
volumetric flask
crigler
44. A potassium level of 6.8 mEq/L is obtained. Before reporting the results - the first step the technologist should take is to...
analyzed immediately
<1%
check serum for hemolysis
parathyroid
45. A patient with malabsorption receives 25 g of d-xylose orally; during the subsequent 5-hour period - the urine excretion of d-xylose is less than 3 g. This would indicate...
Wilson's disease
remove excess unbound iron
intestinal malabsorption
methadone
46. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
placenta
LDL
C3 complement
lower than in adults
47. A patient with glomerulonephritis would present the following serum results...
incorrect aqueous to nonaqueous mixture
attaching them to protein molecules
5 tri 15 cholesterol 50 protein
BUN increased
48. A blood sample was received from the emergency room with a request for narcotic analysis. The request slip indicated that the patient (a known heroin addict) responded to naloxone administration. The serum was negative for morphine by EIA. What other
carbs
methadone
specificity
biuret
49. An electrophoretic separation of lactate dehydrogenase isoenzymes that demonstrates an elevation in LD-l and LD-2 in a "flipped" pattern is consistent with...
correct for variations in flame and atomizer
MI
HDL
lipase
50. The identification of Bence Jones protein is best accomplished by...
adding an acid stabilizer
immunofixation
iron deficiency anemia
C