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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. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
hepatobiliary (obstruction?)
pH pCO2 pO2
viral hepatitis
chylomicrons VLDL
2. The glucose level in normal peritoneal fluid should be...
remove excess unbound iron
enzyme induction
4.5
the same as plasma glucose
3. The measurement of light scattered by particles in the sample is the principle of...
transferrin
trig
peroxidase-like activity of hemoglobin
nephelometry
4. Bioavailability of a drug refers to the...
prevent phosphate interference
incorrect aqueous to nonaqueous mixture
glucose
fraction absorbed into systemic circulation
5. The most consistent analytical error involved in the routine determination of HDLcholesterol is caused by...
pH = pKa + log (salt/acid)
O2
multiplied by 4
a small concentration of APO-B containing lipoproteins after precipitation
6. The most important buffer pair in plasma is the...
dirty applicators
C3 complement
bicarbonate carbonic acid
bone
7. Spectrophotometers isolate a narrow band pass by means of...
parathyroid
hemolysis
prisms and grating
digoxin
8. Beriberi is associated with deficiency of...
chloride
thiamine
dirty applicators
alkaline picrate
9. This 2-hour postprandial glucose values demonstrates unequivocal hyperglycemia diagnostic for diabetes mellitus
200
volumetric flask
WITHOUT a disease with a negative test
1:5
10. The preparation of a patient for standard tolerance testing should include...
4.5
porphyrin and porphobilinogen screen
inhibitor binds to enzyme at same site as substrate
high carbohydrate diet for 3 days
11. Upon development of a thin layer chromatogram for the drug analysis - all drug spots (including the standards) had migrated with the solvent front. The most probable cause for this would be...
1 mol/kg
glucose oxidase
without a disease with a negative test result
incorrect aqueous to nonaqueous mixture
12. The concentration of serum carotene is affected MOST by...
diet
occult blood
didymium filter
bone
13. A potassium level of 6.8 mEq/L is obtained. Before reporting the results - the first step the technologist should take is to...
viral hepatitis
endosmosis
check serum for hemolysis
<45
14. In competitive inhibition of an enzyme reaction the...
acute hepatitis
inhibitor binds to enzyme at same site as substrate
urobilin
measures one ion more than others
15. Unless blood gas measurements are made immediately after sampling - in vitro glycolysis of the blood causes a...
T4 by RIA
fall in pH - rise in pCO2
peptide bonds
GGT
16. In a double-beam photometer - the additional beam is used to...
amylase and lipase
correct for variations in light intensity
glucose
(testing of urine for) delta-am.. acid
17. The most sensitive enzymatic indicator for liver damage from ethanol intake is...
crigler
GGT
porphobilinogen synthetase
testosterone
18. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...
oxalacetate to malate
monitoring the course of a known cancer
inclusion of smokers and nonsmokers in the study population
thyroxine binding globulin
19. Gel filtration chromatography is used to separate...
5
cmpds based on molecular weight and size
chylomicrons
HPLC analysis of porpobilinogen on 24hr urine
20. 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
endosmosis
tissue and serum levels need to reach equilibrium
increased O2 decreased HCO3
21. A patient has signs and symptoms suggestive of acromegaly. The diagnosis would be confirmed if the patient had...
2Na + glucose over 20 + BUN over 3
no decrease in serum growth hormone after 90 minutes
HCT
accuracy
22. 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...
TSH
1:5
show a decrease in glycosylated hgb
biuret
23. This method employs a highly specific antibody to thyroxine
creatine kinase
exchange of amino and keto groups
methyl alcohol
T4 by RIA
24. This method offers the greatest sensitivity for HBsAg testing
low pH
hepatobiliary (obstruction?)
ionic charge
enzyme immunoassay
25. The most heat labile fraction of alkaline phosphatase is obtained from...
prisms and grating
testosterone
bone
thyroxine
26. This wavelengths is within the ultraviolet rang.
acid phosphatase
immunofixation
urinary free cortisol
340
27. 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...
32
inclusion of smokers and nonsmokers in the study population
HCT
remove excess unbound iron
28. Stray light can be detected in a spectrophotometer by utilizing a...
methyl alcohol
respiratory acidosis
spun separated iced and tested immediately
sharp cutoff filter
29. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
M subunit is inactivated
ionization of carboxyl groups (yielding a net negative charge)
glucose tolerance test
para-hydroxylphenyl...
30. Which blood gas electrode is composed of calomel and glass?
oxalacetate to malate
be able to detect 9/10 simple instrument malfunctions
occult blood
CO2
31. Most most likely to be ordered in addition to serum calcium to determine the cause of tetany?
benzoylecogine
no decrease in serum growth hormone after 90 minutes
Mg
32
32. The protein portion of an enzyme complex is called the...
beta
O2
urobilin
apoenzyme
33. In respiratory acidosis - a compensatory mechanism is the increase in...
ALP with fresh draw
decreased lecithin
primidone
plasma bicarbonate
34. The primary function of serum albumin in the peripheral blood is to...
increased O2 decreased HCO3
maintain colloidal osmotic pressure
benzoylecogine
2Na + glucose over 20 + BUN over 3
35. A psychiatric patient was experiencing sever depression - but responded to treatment with amitriptyline with no apparent side effects. A blood sample was sent to the laboratory for therapeutic monitoring. Which drug level would be MOST reflective of
lower than in adults
GGT
amytriptyline 104
HPLC analysis of porpobilinogen on 24hr urine
36. The formula for calculating serum osmolality that incorporates a correction for the water content of plasma is...
changes in the fuel
2Na + glucose over 20 + BUN over 3
CK
placenta
37. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
90%
tissue and serum levels need to reach equilibrium
digoxin
128
38. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
porphobilinogen screen
HPLC analysis of porpobilinogen on 24hr urine
120 minutes
attaching them to protein molecules
39. Oligoclonal bands are present on electrophoresis of concentrated CSF and also on concurrently tested serum of the same patient. The proper interpretation is...
lipase
nondiagnostic for MS
endogenous triglycerides
whole blood can be used
40. The following laboratory results were obtained on arterial blood: Sodium 136 mEq/L pH 7.32 Potassium 4.4 mEq/L PCO2 79 mm Hg Chloride 92 mEq/L Bicarbonate 40 mEq/L These results are most compatible with...
prostate
respiratory acidosis
tissue and serum levels need to reach equilibrium
turn off
41. The main reason for suboptimal drug levels in therapeutic drug monitoring is...
lower than in adults
sample exposed to light
patient noncompliance
parathyroid hormone
42. Regan isoenzyme has the same properties as alkaline phosphatase that originates in the...
placenta
g/MW
there is an absence of correlation
Solute moves half the distance of the solvent front
43. Clinical assays for tumor markers are the most important for...
pH pCO2 pO2
monitoring the course of a known cancer
fresh morning urine for delta-aminolevulinic acid
LDH
44. The formula for calculating the amount of moles of a chemical?
crigler
binding capacity of thyroxine-binding globulin
g/MW
WITHOUT a disease with a negative test
45. 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?
be able to detect 9/10 simple instrument malfunctions
crigler
1.9
methadone
46. How many grams of sodium chloride are needed to prepare 1 L of 0.9% normal saline?
without a disease with a negative test result
measure the total volume
9
inhibitor binds to enzyme at same site as substrate
47. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
iron hemochromatosis
65
iron deficiency anemia
4.5
48. 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...
freezing point
increased O2 decreased HCO3
corticosterone
4.5
49. Bile acid concentrations are useful to assess...
hepatobiliary (obstruction?)
cyclic antidepressants
show a decrease in glycosylated hgb
thyroxine binding globulin
50. The methodology based on the amount of energy absorbed by a subtance as a function of its concentration and using a specific source of the same material as the substance analyzed is...
high carbohydrate diet for 3 days
atomic absorption
GFR
5 tri 15 cholesterol 50 protein