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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 method offers the greatest sensitivity for HBsAg testing
T4 by RIA
TSH
1 micromole per minute
enzyme immunoassay
2. The hemoglobin that is resistant to alkali (KOH) denaturation is...
glucose tolerance test
90%
primidone
F
3. To ensure an accurate ammonia level result - the specimen should be...
run a new set of controls
spun separated iced and tested immediately
sharp cutoff filter
peroxidase-like activity of hemoglobin
4. The most widely employed screening technique for drug abuse is...
correct for variations in flame and atomizer
sharp fibrinogen peak
prisms and grating
TLC
5. High levels of which lipoprotein class are associated with decreased risk of accelerated atherosclerosis?
200x affinity for oxygen
HDL
elevated lactic acid - elevated pyruvate
MI
6. 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...
4.5
testing heparinized plasma
340
D
7. Maple syrup urine disease is characterized by an increase in this urinary amino acids
normal - liver breakdown
5
valine leucine isoleucine
CK
8. When taken by a euthyroid individual - oral contraceptives containing estrogens will have this effects on the thyroid function studies
chemical ionization matrix
TSH
urobilin
increase in total circulating T4
9. In the fasting state - the arterial and capillary blood glucose concentration varies from the venous glucose concentration by approximately how many mg/dL?
5mg higher
2-log(T)
Hb S
g/MW
10. Serum levels that define hypoglycemia in preterm or low birth weight infants are...
lower than in adults
glucose oxidase
exchange of amino and keto groups
inclusion of smokers and nonsmokers in the study population
11. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...
diet
transferrin
sharp fibrinogen peak
sharp cutoff filter
12. What specimen preparation is commonly used to perform the alkaline phosphatase isoenzyme determination?
TSH
0
serum aliquots - one heated
faster than gamma
13. In the atomic absorption method for calcium - lanthanum is used...
5mg higher
prevent phosphate interference
120 minutes
beta
14. 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
sharp fibrinogen peak
hemolysis
TSH
15. The buffering capacity of blood is maintained by a reversible exchange process between bicarbonate and...
chloride
bilirubindiglucuronide
bone
testosterone
16. The formation of estriol in a pregnant woman is dependent on...
fetal and placenta function
carbs
amylase
GLC
17. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone
hyperventilation
atomic absorption
Prolactin
TSH
18. 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?
turn off
exchange of amino and keto groups
be able to detect 9/10 simple instrument malfunctions
respiratory acidosis
19. Which two conditions can "physiologically" elevate serum alkaline phosphatase?
endogenous triglycerides
glucose oxidase
endosmosis
growth - third trimester of pregnancy
20. When myocardial infarction occurs - the first enzyme to become elevated is...
A1
CK
200x affinity for oxygen
lipase
21. Lithium therapy is widely used in the treatment of...
manic-depression
21-hydroxylase deficiency
90%
crigler
22. Currently the most common method for specific identification and quantitation of serum barbiturates is...
apoenzyme
fall in pH - rise in pCO2
GLC
acute hepatitis
23. A spectrophotometer is being considered for purchase by a small laboratory. This specification reflects the spectral purity of the instrument
LDH
glucose tolerance test
iron deficiency anemia
band width
24. The identification of Bence Jones protein is best accomplished by...
hyperthyroidism
immunofixation
200
HPLC analysis of porpobilinogen on 24hr urine
25. A carbonate salt used to control manic-depressive disorders is...
correct for variations in flame and atomizer
O2
respiratory acidosis
lithium
26. Cerebrospinal fluid for glucose assay should be...
analyzed immediately
decreased lecithin
measurement of absorbance at 450
boderline results test should be repeated
27. The fast hemoglobin fraction is...
A1
measures one ion more than others
growth - third trimester of pregnancy
parathyroid hormone
28. Detection of carriers of hereditary coproporphyria should include analysis of...
fresh morning urine for delta-aminolevulinic acid
parathyroid hormone
serum cortisol > 15
metabolic acidosis
29. The urea nitrogen concentration of a serum sample was measured as 15 mg/dL (atomic weights: carbon = 12 - oxygen = 16 - nitrogen = 14 - hydrogen = 1). The urea concentration of the same sample - in mg/dL - is...
9
Solute moves half the distance of the solvent front
32
<1%
30. The unit of measure for a standard solution is...
glucose oxidase
hyperthyroidism
mg/ml
growth - third trimester of pregnancy
31. Diagnostic specificity is defined as the percentage of individuals...
WITHOUT a disease with a negative test
parathyroid
elevated lactic acid - elevated pyruvate
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
32. A 2-year-old child with a decreased serum T4 is described as being somewhat dwarfed - stocky - overweight - and having coarse features. Of the following - the most informative additional laboratory test would be the serum...
A1
TSH
glucose oxidase
thyroxine
33. This serum protein migrates with the beta-globulins on cellulose acetate at pH 8.6...
chemical ionization matrix
specimen exposure to light
inclusion of smokers and nonsmokers in the study population
C3 complement
34. A reciprocal relationship exists between...
chemical ionization matrix
sharp fibrinogen peak
Calcium - phosphorus
glycerol
35. About 90% of phenytoin is excreted in the urine as...
para-hydroxylphenyl...
200x affinity for oxygen
NADH
didymium filter
36. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
serum cortisol > 15
lead
placenta
turn off
37. This calcium procedure utilizes lanthanum chloride to emliminate iterfering substances
atomic absorption
one micromole/minute
peptide bonds
T4 by RIA
38. A 45-year-old woman complains of fatigue - heat intolerance - and hair loss. Serum thyroxine and 125I-T3 resin uptake are abnormally low. What test would confirm that this is a pituitary deficiency?
TSH
didymium filter
placenta
90%
39. The osmolality of a urine or serum specimen is measured by a change in the...
freezing point
coulometry
glucose tolerance test
340
40. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...
thyroxine binding globulin
freezing point
pH pCO2 pO2
creatinine
41. Given the following values:100;120;150;140;130;What is the mean?
128
maintain colloidal osmotic pressure
urinary free cortisol
Hb S
42. 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?
freezing point
impaired response to ACTH stimulation
the fetus is at risk for respiratory distress
iron hemochromatosis
43. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
specimen exposure to light
200x affinity for oxygen
glucose
Calcium - phosphorus
44. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
accuracy
glucose tolerance test
alkaline picrate
Temperature is a function of the number of particles in solution
45. An increase in serum acetone is indicative of a defect in the metabolism of...
carbs
dirty applicators
aldolase
transferrin
46. Which percentage of total serum calcium is nondiffusible protein bound?
plasma bicarbonate
40-50
oxalacetate to malate
carbohydrate hyperalimentation
47. 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...
bilirubindiglucuronide
fall in pH - rise in pCO2
porphobilinogen screen
standard
48. In electrophoresis of serum proteins - arifacts at the application point are most frequently caused by...
methyl alcohol
Temperature is a function of the number of particles in solution
methadone
dirty applicators
49. How many grams of sodium chloride are needed to prepare 1 L of 0.9% normal saline?
urinary free cortisol
apoenzyme
9
high co2 and hco3
50. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
albumin
tissue and serum levels need to reach equilibrium
20:1
sample exposed to light