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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 a double-beam photometer - the additional beam is used to...
iron hemochromatosis
correct for variations in light intensity
endogenous triglycerides
bone
2. A patient had the following serum results: Na+ 140 mEq/L K+ 4.0 mEq/L Glucose 95 mg/dL BUN 10 mg/dL Which osmolality is consistent with these results?
Prolactin
270
electric current
CML
3. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
freezing point
specificity
monitoring the course of a known cancer
glucose tolerance test
4. A potassium level of 6.8 mEq/L is obtained. Before reporting the results - the first step the technologist should take is to...
pilocarpine
ionization of carboxyl groups (yielding a net negative charge)
check serum for hemolysis
inclusion of smokers and nonsmokers in the study population
5. Maple syrup urine disease is characterized by an increase in this urinary amino acids
catalyze redox reactions
1:5
valine leucine isoleucine
ammonia
6. 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
effluent line is obstructed
hyperventilation
270
conjugated hyperbilirubinemia - hepatocellular obstruction
7. The stimulant that causes localized sweating for the sweat test is...
pilocarpine
exposure to CO
A1
thiamine
8. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
catalyze redox reactions
200x affinity for oxygen
bilirubindiglucuronide
iron deficiency anemia
9. A new method is being evaluated. A recovery experiment is performed with the following results: 0.9 mL serum sample + 0.1 mL H20 = 89 mEq/L 0.9 mL serum sample + 0.1 mL analyte std. @ 800 mEq/L = 161 mEq/L The percent recovery of the added analyt
chylomicrons
90%
LDH
fresh morning urine for delta-aminolevulinic acid
10. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?
TSH
glucose tolerance test
one micromole/minute
5
11. Ninety percent of the copper present in plasma is bound to...
D
manic-depression
ceruplasmin
HDL
12. Phenobarbital is a metabolite of...
primidone
65
thyroxine
quantitation of label
13. 4 mL of water is added to 1 mL of serum. This represents this serum dilutions
1:5
carbs
fraction absorbed into systemic circulation
is quantitated by the amount of light produced
14. The unit of measure for a standard solution is...
chemical ionization matrix
chylomicrons
mg/ml
2-log(T)
15. Estrogen and progesterone receptor assays are useful in assessing prognosis in...?
ionic charge
conjugated hyperbilirubinemia - hepatocellular obstruction
breast cancer
glucose
16. Spectrophotometers isolate a narrow band pass by means of...
prisms and grating
digoxin
increase in total circulating T4
no ice clots bubbles
17. The relative migration rate of proteins on cellulose acetate is based on...
para-hydroxylphenyl...
enzyme immunoassay
freezing point
ionic charge
18. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
coulometry
sharp fibrinogen peak
glucose
changes in the fuel
19. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
specificity
parathyroid
methyl alcohol
porphobilinogen screen
20. The expected blood gas results for a patient in chronic renal failure would match the pattern of...
metabolic acidosis
cyclic antidepressants
Tay-sachs
manic-depression
21. An increase in serum acetone is indicative of a defect in the metabolism of...
TSH
decreased lecithin
carbs
glucose oxidase
22. A true statement about high performance liquid chromatography (HPLC) is that it...
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
measurement of absorbance at 450
increased O2 decreased HCO3
corticosterone
23. The TRH (thyrotropin-releasing hormone) stimulation test is useful in assessing...
(testing of urine for) delta-am.. acid
cholesterol normal triglycerides elevated
hyperthyroidism
absorptivity x light path x concentration
24. In the liver - bilirubin is converted to...
measure the total volume
lactic acidosis
creatine kinase
bilirubindiglucuronide
25. The reason carbon monoxide is so toxic is because it...
200x affinity for oxygen
nondiagnostic for MS
run a new set of controls
prisms and grating
26. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
glass
creatine kinase
g/MW
absorptivity x light path x concentration
27. Serum levels that define hypoglycemia in preterm or low birth weight infants are...
200
hepatobiliary (obstruction?)
porphobilinigen SCREEN
lower than in adults
28. Specimens for blood gas determination should be drawn into a syringe containing...
high co2 and hco3
changes in the fuel
Hb S
heparin
29. Given the following results: Alkaline phosphatase Marked increase Aminotransferase Slight increase Aspartate aminotransferase Slight increase Alanine gamma-glutamyl transferase Marked increase This is most consistent with...
primary hyperparathyroidism
obstructive jaundice
chemical ionization matrix
@ 100
30. When separating serum proteins by cellulose acetate electrophoresis using veronal buffer at pH 8.6 - beta globulin migrates...
2Na + glucose over 20 + BUN over 3
fraction absorbed into systemic circulation
catalyze redox reactions
faster than gamma
31. 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
freezing point
one micromole/minute
correct for variations in light intensity
chylomicrons VLDL
32. 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?
corticosterone
Tay-sachs
TSH
creatine kinase
33. This wavelengths is within the ultraviolet rang.
testing heparinized plasma
340
turn off
T4 by RIA
34. In respiratory acidosis - a compensatory mechanism is the increase in...
HPLC analysis of porpobilinogen on 24hr urine
plasma bicarbonate
cancel test
scattered at a right angle
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
amytriptyline 104
inhibitor binds to enzyme at same site as substrate
dihydroxyacetone side chain
(testing of urine for) delta-am.. acid
36. This disease is associated with the greatest elevation of lactate dehydrogenase isoenzyme 1?
B12 deficiency
remove excess unbound iron
cmpds based on molecular weight and size
nondiagnostic for MS
37. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...
remove excess unbound iron
glass
attaching them to protein molecules
no ice clots bubbles
38. The osmolality of a urine or serum specimen is measured by a change in the...
fetal and placenta function
freezing point
iron deficiency anemia
cmpds based on molecular weight and size
39. This diseases results from a familial absence of high-density lioprotein
carbs
be able to detect 9/10 simple instrument malfunctions
Tangier
absorptivity x light path x concentration
40. 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...
A1c
pO2 increased HCO3 decreased
albumin
<45
41. This enzyme substrates for prostatic acid phosphatase determination results in the highest specificity
run a new set of controls
thymolpthalein monophosphate
340
minimize the effects of interference
42. Magnesium carbonate is added in an iron binding capacity determination in order to...
serum cortisol > 15
remove excess unbound iron
one micromole/minute
pilocarpine
43. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
bicarbonate buffer
pituitary
apoenzyme
standard
44. This steroid is an adrenal cortical hormone
corticosterone
potassium dichromate in SA
patient noncompliance
21-hydroxylase deficiency
45. 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
lipase
Tay-sachs
changes in the fuel
prevent phosphate interference
46. This is a glycolytic enzyme that catalyzes the cleavage of fructose-1 - 6-diphosphate to glyceraldehyde-3-phosphate and dihydroxyacetone phosphate
L/S ratio > 3.5
aldolase
pO2 increased HCO3 decreased
effluent line is obstructed
47. A reciprocal relationship exists between...
nondiagnostic for MS
plasma bicarbonate
(testing of urine for) delta-am.. acid
Calcium - phosphorus
48. 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?
bone
pituitary
cysteine
5
49. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
increase in total circulating T4
bicarbonate buffer
carbs
4.5
50. Measurement of the serum acid phosphatase is used to detect neoplastic disease of the...
ionic charge
have a negative charge
sharp cutoff filter
prostate