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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. In the Jaffe reaction - creatine reacts with...
peroxidase-like activity of hemoglobin
D
freezing point
alkaline picrate
2. Currently the most common method for specific identification and quantitation of serum barbiturates is...
increased O2 decreased HCO3
pO2 increased HCO3 decreased
GLC
act as carriers for ions
3. The biologically most active - naturally occuring androgen is...
check serum for hemolysis
show a decrease in glycosylated hgb
parathyroid hormone
testosterone
4. Kernicterus is an abnormal accumulation of bilirubin in...
thyroxine
brain
have a negative charge
serum cortisol > 15
5. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
wavelength
absorptivity x light path x concentration
urobilin
6. The ability of a procedure to measure only the component(s) it claims to measure is called...
act as carriers for ions
porphobilinogen screen
specificity
Prolactin
7. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...
Wilson's disease
testosterone
Solute moves half the distance of the solvent front
whole blood can be used
8. Beriberi is associated with deficiency of...
CK-MB
thiamine
potassium dichromate in SA
pCO2
9. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
TSH
electric current
chloride
agarose
10. Before unconjugated bilirubin can react with Ehrlich's diazo reagent - this must be added
methyl alcohol
coulometry
fresh morning urine for delta-aminolevulinic acid
conjugated hyperbilirubinemia - hepatocellular obstruction
11. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...
the fetus is at risk for respiratory distress
correct for variations in flame and atomizer
adding an acid stabilizer
Wilson's disease
12. The enzyme present in almost all tissues that may be separated by electrophoresis into five components is...
T4 by RIA
LDH
increase in total circulating T4
1 mol/kg
13. The biuret reaction for the analysis of serum protein depends on the number...
low pH
peptide bonds
pH pCO2 pO2
bicarbonate carbonic acid
14. These enzymes of heme biosynthesis are inhibited by lead
increased O2 decreased HCO3
porphobilinogen synthetase
ionization of carboxyl groups (yielding a net negative charge)
para-hydroxylphenyl...
15. Aminotransferase enzymes catalyze the...
exchange of amino and keto groups
BUN increased
thymolpthalein monophosphate
specificity
16. Coulometry is used to measure...
ceruplasmin
<45
atomic absorption
chloride
17. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
properties of the membrane
100nmol
catalyze redox reactions
thyroxine binding globulin
18. A serum sample was assayed for bilirubin at 10 AM and the result was 12 mg/dL. The same sample was retested at 3 PM. The result now is 8 mg/dL. The most likely explanation for this discrepancy is...
endogenous triglycerides
breast cancer
sample exposed to light
primary hyperparathyroidism
19. 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?
valine leucine isoleucine
correct for variations in light intensity
LDH
lead
20. In the assay of lactate dehydrogenase - this product is actually measured
monitoring the course of a known cancer
NADH
adding an acid stabilizer
5mg higher
21. 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
chylomicrons VLDL
inclusion of smokers and nonsmokers in the study population
remove excess unbound iron
incorrect aqueous to nonaqueous mixture
22. The enzyme that exists chiefly in skeletal muscle - heart - and brain; is grossly elevated in active muscular dystrophy; and rises early in myocardial infarction is...
LDL
cancel test
creatine kinase
1 mol/kg
23. In electrophoresis of serum proteins - arifacts at the application point are most frequently caused by...
turn off
the fetus is at risk for respiratory distress
fall in pH - rise in pCO2
dirty applicators
24. Major actions of angiotensin II include...
exposure to CO
freezing point
increased vasoconstriction
21-hydroxylase deficiency
25. The stimulant that causes localized sweating for the sweat test is...
pilocarpine
chylomicrons
urobilin
correct for variations in flame and atomizer
26. The hemoglobin that is resistant to alkali (KOH) denaturation is...
fall in pH - rise in pCO2
amylase
F
aldolase
27. A patient with glomerulonephritis would present the following serum results...
Calcium - phosphorus
BUN increased
5 tri 15 cholesterol 50 protein
ammonia
28. At blood pH 7.40 what is the ratio between bicarbonate and carbonic acid?
20:1
591
BUN increased
pilocarpine
29. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
Hb S
growth - third trimester of pregnancy
no decrease in serum growth hormone after 90 minutes
measurement of absorbance at 450
30. Sixty to seventy-five percent of the plasma cholesterol is transported by...
immunofixation
thymolpthalein monophosphate
increase in total circulating T4
LDL
31. Malic dehydrogenase is added to the aspartate aminotransaminase (AST) reaction to catalyze the conversion of...
standard
porphobilinogen screen
oxalacetate to malate
boderline results test should be repeated
32. In a double-beam photometer - the additional beam is used to...
electric current
acute hepatitis
correct for variations in light intensity
high carbohydrate diet for 3 days
33. Diagnostic specificity is defined as the percentage of individuals...
endogenous triglycerides
methadone
without a disease with a negative test result
potassium dichromate in SA
34. The most sensitive enzymatic indicator for liver damage from ethanol intake is...
GGT
@ 100
NADH
correct for variations in flame and atomizer
35. An automated method for measuring chloride that generates silver ions in the reaction is...
coulometry
boderline results test should be repeated
respiratory ACIDOSIS
high carbohydrate diet for 3 days
36. Clinical assays for tumor markers are the most important for...
90%
correct for variations in light intensity
transferrin
monitoring the course of a known cancer
37. A reciprocal relationship exists between...
primary hyperparathyroidism
M subunit is inactivated
Calcium - phosphorus
amylase
38. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
thyroxine
albumin
porphobilinigen SCREEN
BUN 80
39. The greatest activities of serum AST and ALT are seen in...
decreased lecithin
correct for variations in light intensity
mg/ml
acute hepatitis
40. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?
dirty applicators
sample exposed to light
chemical ionization matrix
BUN 80
41. The following data were obtained on amniotic fluid from a gestation of 36 weeks' duration by menstrual dates: L/S = 2 Phosphatidyl glycerol not present This can be concluded from these data?
parathyroid
TLC
the fetus is at risk for respiratory distress
endosmosis
42. 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?
NADH
cyclic antidepressants
glucose tolerance test
5
43. This enzymes catalyzes the conversion of starch to glucose and maltose
bicarbonate buffer
pH = pKa + log (salt/acid)
thyroxine
amylase
44. The following five sodium control values (mEq/L) were obtained:140 - 135 - 138 - 140 - 142Calculate the coefficient of variation.
5
crigler
1.9
ionization of carboxyl groups (yielding a net negative charge)
45. 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
run a new set of controls
agarose
remove excess unbound iron
band width
46. The major fraction of organic iodine in the circulation is in the form of...
thyroxine
the fetus is at risk for respiratory distress
lipase
Wilson's disease
47. Serum from a patient with metastatic carcinoma of the prostate was separated from the clot and stored at room temperature. The following results were obtained: Patient Reference Range Calcium: 10.8 mg/dL 8.8-10.3 mg/dL LD:420 U/L 50-150 U/L Acid phos
cyclic antidepressants
methyl alcohol
ALP with fresh draw
parathyroid hormone
48. The concentration of serum carotene is affected MOST by...
diet
properties of the membrane
primary hyperparathyroidism
minimize the effects of interference
49. The identification of Bence Jones protein is best accomplished by...
5 tri 15 cholesterol 50 protein
BUN increased
immunofixation
bicarbonate carbonic acid
50. An Rf value of 0.5 in thin-layer chromatography means...
BUN increased
without a disease with a negative test result
Solute moves half the distance of the solvent front
show a decrease in glycosylated hgb