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Chemistry Certification
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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. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
Tay-sachs
decreased lecithin
no ice clots bubbles
testosterone
2. Which percentage of total serum calcium is nondiffusible protein bound?
maintain colloidal osmotic pressure
20:1
prisms and grating
40-50
3. In the Jaffe reaction - creatine reacts with...
measure the total volume
draw blood for glucose and discontinue test
alkaline picrate
the same as plasma glucose
4. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...
sharp fibrinogen peak
65
acute hepatitis
benzoylecogine
5. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH
glycerol
act as carriers for ions
HCT
ceruplasmin
6. At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?
electric current
LDL
CO2 and pH elevated
20:1
7. A reciprocal relationship exists between...
freezing point
Calcium - phosphorus
TSH
low pH
8. This is a regulatory hormone.
inhibitor binds to enzyme at same site as substrate
analyzed immediately
creatinine
parathyroid hormone
9. A low concentrarion of serum phosphorus is commonly found in...
breast cancer
primidone
carbohydrate hyperalimentation
@ 100
10. Aminotransferase enzymes catalyze the...
chemical ionization matrix
viral hepatitis
100 nmol
exchange of amino and keto groups
11. In an internal standard flame photometer - the internal standard is used to...
correct for variations in flame and atomizer
1.9
cysteine
LDH
12. Amino acid associated with a sulfhydryl group
atomic absorption
cysteine
there is an absence of correlation
sample exposed to light
13. The general types of interference in atomic absorption spectrophotometry...
spun separated iced and tested immediately
chemical ionization matrix
improving state of metabolic control (as indicated by fructosamine)
inhibitor binds to enzyme at same site as substrate
14. The greatest activities of serum AST and ALT are seen in...
acute hepatitis
measures one ion more than others
fetal and placenta function
turn off
15. In familial hypercholesterolemia - the hallmark finding is an elevation of...
testing heparinized plasma
LDL
GLC
aldolase
16. A patient with myeloproliferative disorder has the following values: Hgb = 13 g/dL Hct = 38% WBC = 30 x 10^3/uL Platelets = 1000 x 10^3/uL Serum Na+ = 140 mEq/L Serum K+ = 7 mEq/L The serum K+ should be confirmed by...
glucose
testing heparinized plasma
normal - liver breakdown
cyclic antidepressants
17. An electrophoretic separation of lactate dehydrogenase isoenzymes that demonstrates an elevation in LD-l and LD-2 in a "flipped" pattern is consistent with...
Prolactin
wavelength
specimen exposure to light
MI
18. Patients with Cushing's syndrome exhibit...
have a negative charge
serum cortisol > 15
bone
parathyroid
19. In the atomic absorption method for calcium - lanthanum is used...
prevent phosphate interference
3500
effluent line is obstructed
properties of the membrane
20. The hemoglobin that is resistant to alkali (KOH) denaturation is...
creatine kinase
Prolactin
F
bicarbonate buffer
21. Diagnostic specificity is defined as the percentage of individuals...
band width
inclusion of smokers and nonsmokers in the study population
glucose oxidase
without a disease with a negative test result
22. 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
incorrect aqueous to nonaqueous mixture
2-log(T)
65
23. The glucose level in normal peritoneal fluid should be...
the same as plasma glucose
lower than in adults
testosterone
monitoring the course of a known cancer
24. A condition in which erythrocyte protoporphyrin is increased is...
band width
iron deficiency anemia
porphobilinogen synthetase
have a negative charge
25. The osmolal gap is defined as measured Osm/kg minus the calculated Osm/kg. The average osmolal gap is near...
CML
0
normal - liver breakdown
respiratory ACIDOSIS
26. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...
specificity
specimen exposure to light
volumetric flask
<45
27. Which blood gas electrode is composed of calomel and glass?
increase in total circulating T4
SD over mean
T4 by RIA
CO2
28. In respiratory acidosis - a compensatory mechanism is the increase in...
Mg
TLC
plasma bicarbonate
bilirubindiglucuronide
29. Blood received in the laboratory for blood gas analysis must meet these requirements
WITHOUT a disease with a negative test
no ice clots bubbles
Hb S
pilocarpine
30. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
L/S ratio > 3.5
alpha 2 beta
tissue and serum levels need to reach equilibrium
apoenzyme
31. A one MOLAL solution is equivalent to...
carbohydrate hyperalimentation
1 mol/kg
boderline results test should be repeated
high carbohydrate diet for 3 days
32. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
parathyroid
2Na + glucose over 20 + BUN over 3
run a new set of controls
hepatobiliary (obstruction?)
33. 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...
normal - liver breakdown
acute intermittent porphyria
120 minutes
agarose
34. In thin layer chromatography - the Rf value for a compound is given by the...
ratio of distance moved by solvent to distance moved by compound
viral hepatitis
bilirubin
sample exposed to light
35. 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
prostate
check serum for hemolysis
conjugated hyperbilirubinemia - hepatocellular obstruction
trig
36. The most specific enzyme test for acute pancreatitis is...
200
multiplied by 4
lipase
testing heparinized plasma
37. Gas chromatography with the nitrogen/phosphorus detector is the most commonly used technique for the analysis of...
freezing point
prostate
LDH
cyclic antidepressants
38. Given the following results: Alkaline phosphatase Marked increase Aminotransferase Slight increase Aspartate aminotransferase Slight increase Alanine gamma-glutamyl transferase Marked increase This is most consistent with...
a small concentration of APO-B containing lipoproteins after precipitation
impaired response to ACTH stimulation
obstructive jaundice
maintain colloidal osmotic pressure
39. An HPLC operator notes that the column pressure is too high - is rising too rapidly - and the recorder output is not producing normal peaks. The most probable cause of the problem is...
glucose
respiratory acidosis
effluent line is obstructed
GFR
40. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
LDH
acute hepatitis
Wilson's disease
bilirubin
41. This serum protein migrates with the beta-globulins on cellulose acetate at pH 8.6...
270
C3 complement
200
90%
42. About 90% of phenytoin is excreted in the urine as...
corticosterone
patient noncompliance
run a new set of controls
para-hydroxylphenyl...
43. The reason carbon monoxide is so toxic is because it...
turn off
200x affinity for oxygen
run a new set of controls
occult blood
44. An acid cleaning solution for glassware consists of...
tissue and serum levels need to reach equilibrium
fraction absorbed into systemic circulation
9
potassium dichromate in SA
45. The anticonvulsant used to control tonic-clonic (grand mal) seizures is...
phenytoin
methyl alcohol
crigler
90%
46. Phenobarbital is a metabolite of...
fraction absorbed into systemic circulation
5mg higher
primidone
patient noncompliance
47. Most automated blood gas analyzers directly measure...
pH pCO2 pO2
creatinine
Prolactin
correct for variations in flame and atomizer
48. This hemoglobin has glucose-6-phosphate on the amino-terminal valine of the beta chain?
electric current
high co2 and hco3
A1c
glucose tolerance test
49. The concentration of serum carotene is affected MOST by...
NADH
128
show a decrease in glycosylated hgb
diet
50. A pH of 7.0 represents a H+ concentration of...
100nmol
200
TSH
incorrect aqueous to nonaqueous mixture
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