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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. High levels of which lipoprotein class are associated with decreased risk of accelerated atherosclerosis?
beta
HDL
serum aliquots - one heated
lipase
2. A blood creatinine value of 5.0 mg/dL is most likely to be found with this blood value?
viral hepatitis
chloride
Tangier
BUN 80
3. 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...
O2
didymium filter
testing heparinized plasma
patient noncompliance
4. A fresh urine sample is received for "porphyrins" or "porphyria" without further information or specifications. Initial analysis should include...
the fetus is at risk for respiratory distress
porphyrin and porphobilinogen screen
properties of the membrane
glucose tolerance test
5. This enzyme substrates for prostatic acid phosphatase determination results in the highest specificity
there is an absence of correlation
catalyze redox reactions
minimize the effects of interference
thymolpthalein monophosphate
6. Blood specimens for digoxin assays should be obtained between 8 hours or more after drug administration because...
tissue and serum levels need to reach equilibrium
decreased lecithin
270
32
7. The primary function of serum albumin in the peripheral blood is to...
be able to detect 9/10 simple instrument malfunctions
20:1
maintain colloidal osmotic pressure
0
8. An automated CK assay gives a reading that is above the limits of linearity. A dilution of the serum sample is made by adding 1 mL of serum to 9 mL of water. The instrument now rew 350 U/L. The correct report on the undiluted serum should be...
@ 100
plasma bicarbonate
correct for variations in light intensity
3500
9. The ability of a procedure to measure only the component(s) it claims to measure is called...
specificity
200x affinity for oxygen
1 micromole per minute
digoxin
10. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
Temperature is a function of the number of particles in solution
bilirubin
didymium filter
low pH
11. The major fraction of organic iodine in the circulation is in the form of...
impaired response to ACTH stimulation
thyroxine
90%
120 minutes
12. The Henderson-Hasselbalch equation
ammonia
hepatobiliary (obstruction?)
porphobilinigen SCREEN
pH = pKa + log (salt/acid)
13. A 9-month-old boy from Israel has gradually lost the ability to sit up and develops seizures. He has an increased amount of a phospholipid called GM2-ganglioside in his neurons - and he lacks the enzyme hexosaminidase A in his leukocytes. These findi
pO2 increased HCO3 decreased
Tay-sachs
correct for variations in flame and atomizer
freezing point
14. Respiratory acidosis is described as a(n): ______ increase in CO2 decrease in pH
glycerol
amytriptyline 104
amylase and lipase
200
15. The method of choice for diagnosis of a protracted attack of porphyria is...
100 nmol
impaired response to ACTH stimulation
HPLC analysis of porpobilinogen on 24hr urine
valine leucine isoleucine
16. The glucose level in normal peritoneal fluid should be...
CO2 and pH elevated
diet
the same as plasma glucose
100nmol
17. A one MOLAL solution is equivalent to...
GGT
1 mol/kg
coulometry
mg/ml
18. The nanometer is a measurement of...
1:5
(testing of urine for) delta-am.. acid
intestinal malabsorption
wavelength
19. 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
run a new set of controls
bicarbonate buffer
pCO2
20. The formula for coefficient of variation?
MI
GLC
bicarbonate buffer
SD over mean
21. Bioavailability of a drug refers to the...
5
fraction absorbed into systemic circulation
growth - third trimester of pregnancy
endosmosis
22. The reason carbon monoxide is so toxic is because it...
pH = pKa + log (salt/acid)
200x affinity for oxygen
benzoylecogine
draw blood for glucose and discontinue test
23. 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...
porphyrin and porphobilinogen screen
atomic absorption
beta
pCO2
24. Isoenzyme assays are preformed to improve...
CK
specificity
cyclic antidepressants
thiamine
25. 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...
sample exposed to light
thiamine
absorptivity x light path x concentration
trig
26. The direction in which albumin migrates (ie - toward anode or cathode) during electrophoretic separation of serum proteins - at pH 8.6 - is determined by...
thyroxine
fetal and placenta function
incorrect aqueous to nonaqueous mixture
ionization of carboxyl groups (yielding a net negative charge)
27. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
40-50
growth - third trimester of pregnancy
creatinine clearance
viral hepatitis
28. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
metabolic acidosis
bilirubindiglucuronide
591
@ 100
29. 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
ALP with fresh draw
glucose
maintain colloidal osmotic pressure
pituitary
30. A pH of 7.0 represents a H+ concentration of...
3500
100 nmol
0
glucose tolerance test
31. Currently the most common method for specific identification and quantitation of serum barbiturates is...
GLC
glycerol
M subunit is inactivated
bone
32. A 45-year-old woman has a fasting serum glucose concentration of 95 mg/dL and a 2-hour postprandial glucose concentration of 105 mg/dL. The statement that best describes this patient's fasting serum glucose concentration is...
normal - liver breakdown
A1
para-hydroxylphenyl...
thyroxine binding globulin
33. Most chemical methods for determining total protein utilize this reaction?
biuret
improving state of metabolic control (as indicated by fructosamine)
sodium potassium chloride CO2
porphobilinogen synthetase
34. Cerebrospinal fluid for glucose assay should be...
340
electric current
creatinine
analyzed immediately
35. In respiratory acidosis - a compensatory mechanism is the increase in...
CO2 and pH elevated
maintain colloidal osmotic pressure
plasma bicarbonate
thiamine
36. On immunoassays using enzyme-labeled antibodies or antigens: ___________ can be carried out with a spectrophotometer
100 nmol
maintain colloidal osmotic pressure
quantitation of label
ALP with fresh draw
37. 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...
parathyroid
immunofixation
(testing of urine for) delta-am.. acid
standard
38. In a normal individual - injection of thyrotropin-releasing hormone (TRH) causes an increase in blood concentrations of this hormone
lactic acidosis
Prolactin
glucose oxidase
correct for variations in flame and atomizer
39. Unless blood gas measurements are made immediately after sampling - in vitro glycolysis of the blood causes a...
transferrin
fall in pH - rise in pCO2
cysteine
ratio of distance moved by solvent to distance moved by compound
40. Given the following values:100;120;150;140;130;What is the mean?
CK-MB
serum aliquots - one heated
decreased lecithin
128
41. 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...
dirty applicators
increased vasoconstriction
TSH
creatinine clearance
42. A patient with malabsorption receives 25 g of d-xylose orally; during the subsequent 5-hour period - the urine excretion of d-xylose is less than 3 g. This would indicate...
a small concentration of APO-B containing lipoproteins after precipitation
attaching them to protein molecules
respiratory acidosis
intestinal malabsorption
43. 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...
check serum for hemolysis
pO2 increased HCO3 decreased
cyclic antidepressants
atomic absorption
44. A thick white turbid specimen was received in the laboratory labeled as pericardial fluid. A microscopic examination was performed - and the differential included 90% PMNs. The fluid is...
prostate
adding an acid stabilizer
primidone
purulent
45. A 68-year-old man arrives in the emergency room with a glucose level of 722 mg/dL and serum acetone of 4+ undiluted. An arterial blood gas from this patient is likely to indicate...
cyclic antidepressants
low pH
A1c
40-50
46. A sweat chloride result of 55 mEq/L and a sweat sodium of 52 mEq/L were obtained ona patient who has a history of respiratory problems. The bestc interpretation of these results is...
testing heparinized plasma
C3 complement
boderline results test should be repeated
transferrin
47. The electrophoretic pattern of a plasma sample compared with a serum sample shows a...
sharp fibrinogen peak
atomic absorption
prostate
bilirubin
48. The general types of interference in atomic absorption spectrophotometry...
HDL
chemical ionization matrix
albumin
Calcium - phosphorus
49. A technician is asked by the supervisor to prepare a standard solution from the stock standard. What is the glassware of choice for this solution?
HCT
volumetric flask
Calcium - phosphorus
BUN 80
50. A patient with type I insulin-dependent diabetes mellitus has the following results: Fasting blood glucose: 150 mg/dL (70-110 rng/dL) Hemoglobin A1c: 25% (6.0%-19.5%) Fructosamine: 3.0 mmol/L ( 2.0-5.3 mmol/L)
L/S ratio > 3.5
improving state of metabolic control (as indicated by fructosamine)
glycerol
1.1