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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. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate
breast cancer
dihydroxyacetone side chain
aldolase
ammonia
2. Before unconjugated bilirubin can react with Ehrlich's diazo reagent - this must be added
wavelength
methyl alcohol
creatine kinase
lithium
3. Characteristic of the Bence Jones protein that is used to distinguish it from other urinary proteins is its solubility...
lead
@ 100
fraction absorbed into systemic circulation
inhibitor binds to enzyme at same site as substrate
4. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
obstructive jaundice
bicarbonate carbonic acid
glucose tolerance test
GGT
5. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
valine leucine isoleucine
elevated lactic acid - elevated pyruvate
placenta
high carbohydrate diet for 3 days
6. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
analyzed immediately
nondiagnostic for MS
100nmol
intestinal malabsorption
7. The most important buffer pair in plasma is the...
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
bicarbonate carbonic acid
B12 deficiency
the fetus is at risk for respiratory distress
8. This condition does decrease activity of glucuronyl transferase result in increased unconjugated bilirubin and kernicterus in neonates
crigler
pH pCO2 pO2
bone
Hb S
9. The greatest activities of serum AST and ALT are seen in...
alpha 2 beta
no decrease in serum growth hormone after 90 minutes
acute hepatitis
MI
10. In familial hypercholesterolemia - the hallmark finding is an elevation of...
100nmol
0
LDL
pilocarpine
11. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
no decrease in serum growth hormone after 90 minutes
hemolysis
the fetus is at risk for respiratory distress
atomic absorption
12. In an internal standard flame photometer - the internal standard is used to...
urinary free cortisol
chloride
3500
correct for variations in flame and atomizer
13. In a double-beam photometer - the additional beam is used to...
prevent phosphate interference
correct for variations in light intensity
show a decrease in glycosylated hgb
glucose
14. 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
bone
patient noncompliance
ALP with fresh draw
metabolic acidosis
15. When taken by a euthyroid individual - oral contraceptives containing estrogens will have this effects on the thyroid function studies
5 tri 15 cholesterol 50 protein
1 mol/kg
run a new set of controls
increase in total circulating T4
16. Measurement of the serum acid phosphatase is used to detect neoplastic disease of the...
turn off
iron hemochromatosis
@ 100
prostate
17. 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...
emphysema
20:1
normal - liver breakdown
there is an absence of correlation
18. When the exact concentration of the solute of a solution is known and is used to evaluate the concentration of an unknown solution - the known solution is...
bicarbonate carbonic acid
standard
L/S ratio > 3.5
2Na + glucose over 20 + BUN over 3
19. The osmolality of a urine or serum specimen is measured by a change in the...
diet
improving state of metabolic control (as indicated by fructosamine)
freezing point
have a negative charge
20. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?
C3 complement
thiamine
breast cancer
ionic charge
21. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
glucose
TSH
65
exposure to CO
22. Certain enzymes are activated to metabolize drugs as a result of another drug action. This is referred to as...
enzyme induction
breast cancer
sample exposed to light
enzyme immunoassay
23. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
100 nmol
volumetric flask
placenta
tissue and serum levels need to reach equilibrium
24. 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
conjugated hyperbilirubinemia - hepatocellular obstruction
amytriptyline 104
ammonia
specificity
25. A 24-hour urine specimen (total volume = 1136 mL) is submitted to the laboratory for quantitative urine protein. Calculate the amount of protein excreted per day - if the total protein is 52 mg/dL.
CK
591
thyroxine
200
26. In electrophoretic analysis - buffers...
act as carriers for ions
didymium filter
parathyroid hormone
2-log(T)
27. A serum sample for acid phosphatase determination is best prepared for room temperature storage by...
(testing of urine for) delta-am.. acid
adding an acid stabilizer
mg/ml
LDH
28. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
thyroxine binding globulin
respiratory ACIDOSIS
exchange of amino and keto groups
Hb S
29. In monitoring glomerular function - this test has the highest sensitivity
dihydroxyacetone side chain
creatinine clearance
cyclic antidepressants
128
30. 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...
TLC
CO2
viral hepatitis
1 micromole per minute
31. In the assay of lactate dehydrogenase - this product is actually measured
is quantitated by the amount of light produced
NADH
triglycerides
be able to detect 9/10 simple instrument malfunctions
32. The most common type of congenital adrenal hyperplasia associated with increased plasma concentrations of 17 a-hydroxyprogesterone and increased urinary excretion of pregnanetriol is...
thymolpthalein monophosphate
alpha 2 beta
draw blood for glucose and discontinue test
21-hydroxylase deficiency
33. 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...
primary hyperparathyroidism
without a disease with a negative test result
thyroxine binding globulin
40-50
34. Rickets is associated with deficiency of...
faster than gamma
D
F
porphobilinogen synthetase
35. The definitive diagnosis of primary adrenal insufficiency requires demonstration of...
thymolpthalein monophosphate
impaired response to ACTH stimulation
amylase
oxalacetate to malate
36. 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...
effluent line is obstructed
occult blood
bicarbonate buffer
electric current
37. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...
bicarbonate buffer
chylomicrons VLDL
270
sharp fibrinogen peak
38. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...
creatine kinase
plasma bicarbonate
binding capacity of thyroxine-binding globulin
whole blood can be used
39. 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?
lower than in adults
absorptivity x light path x concentration
run a new set of controls
mg/ml
40. The principle of the occult blood test depends on the...
the same as plasma glucose
ceruplasmin
peroxidase-like activity of hemoglobin
maintain colloidal osmotic pressure
41. Most automated blood gas analyzers directly measure...
pH pCO2 pO2
pilocarpine
placenta
sodium potassium chloride CO2
42. Diagnostic specificity is defined as the percentage of individuals...
dirty electrodes
5
without a disease with a negative test result
albumin
43. The glucose level in normal peritoneal fluid should be...
measurement of absorbance at 450
high co2 and hco3
the same as plasma glucose
20:1
44. Patients with Cushing's syndrome exhibit...
sharp fibrinogen peak
serum cortisol > 15
3500
Solute moves half the distance of the solvent front
45. The presence of this isoenzymes indicates acute myocardial damage
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
cancel test
D
CK-MB
46. This enzymes catalyzes the conversion of starch to glucose and maltose
amylase
lower than in adults
200x affinity for oxygen
without a disease with a negative test result
47. If the correlation coefficient (r) of two variables is zero...
glycerol
there is an absence of correlation
dihydroxyacetone side chain
parathyroid
48. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
enzyme induction
chloride
TSH
cysteine
49. A one MOLAL solution is equivalent to...
chemical ionization matrix
immunofixation
1 mol/kg
CO2
50. A potentiometric electrode that measures an analyte that passes through a selectively premeable membrane and rapidly enters into an equilibrium with an electrolyte solution is...
cysteine
HDL
pCO2
Solute moves half the distance of the solvent front