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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 employs a highly specific antibody to thyroxine
CML
T4 by RIA
breast cancer
normal - liver breakdown
2. Scurvy is associated with deficiency of...
creatine kinase
electric current
normal - liver breakdown
C
3. In developing the reference for a new EIA for CEA - the range for the normal population was broader than that published by the vendor. Controls are acceptable with a narrow coefficient of variation. This may be explained by...
chylomicrons
crigler
decreased lecithin
inclusion of smokers and nonsmokers in the study population
4. The most heat labile fraction of alkaline phosphatase is obtained from...
specificity
ammonia
scattered at a right angle
bone
5. The buffer pH most effective at allowing amphoteric proteins to migrate toward the cathode in an electrophoretic system would be...
thyroxine
MI
triglycerides
4.5
6. A cardiac glycoside that is used in the treatment of congenital heart failure and arrhythmias by increasing the force and velocity of myocardial contraction is...
digoxin
dihydroxyacetone side chain
triglycerides
hepatobiliary (obstruction?)
7. What substance gives feces its normal color?
urobilin
specimen exposure to light
iron hemochromatosis
fetal and placenta function
8. 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?
digoxin
corticosterone
no ice clots bubbles
the fetus is at risk for respiratory distress
9. This hemoglobin has glucose-6-phosphate on the amino-terminal valine of the beta chain?
A1c
thyroxine
multiplied by 4
ammonia
10. In respiratory acidosis - a compensatory mechanism is the increase in...
plasma bicarbonate
specimen exposure to light
BUN 80
agarose
11. The following results were obtained in a creatinine clearance evaluation: Urine concentration 84 mg/dL Urine volume 1440 mL/24 hr Serum concentration 1.4 mg/dL Body surface area 1.60 m2 (average = 1.73 m2) The creatinine cle~trance in mL/min is...
hyperventilation
65
urobilin
BUN increased
12. Diagnostic specificity is defined as the percentage of individuals...
Temperature is a function of the number of particles in solution
without a disease with a negative test result
high carbohydrate diet for 3 days
correct for variations in light intensity
13. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
5mg higher
porphobilinogen screen
3500
correct for variations in flame and atomizer
14. The following data were obtained from a cellulose acetate protein electrophoresis scan: Albumin area 75 units Gamma globulin area 30 units Total area 180 units Total protein 6.5 g/dL The gamma globulin content in g/dL is...
tissue and serum levels need to reach equilibrium
lead
1.1
intestinal malabsorption
15. The formula for coefficient of variation?
C
SD over mean
improving state of metabolic control (as indicated by fructosamine)
boderline results test should be repeated
16. This diseases results from a familial absence of high-density lioprotein
adding an acid stabilizer
BUN 80
Tangier
trig
17. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...
immunofixation
thyroxine binding globulin
para-hydroxylphenyl...
viral hepatitis
18. The Porter-Silber method (phenylhydrazine in alcohol and sulfuric acid) involves which part of the steroid molecule?
cysteine
dihydroxyacetone side chain
hepatobiliary (obstruction?)
alpha 2 beta
19. Measurement of the serum acid phosphatase is used to detect neoplastic disease of the...
591
prostate
bilirubindiglucuronide
cancel test
20. An automated method for measuring chloride that generates silver ions in the reaction is...
HCT
coulometry
pH = pKa + log (salt/acid)
properties of the membrane
21. The following bilirubin results are obtained on a patient: Day 1: 4.3 mg/dL Day 4: 2.2 mg/dL Day 2: 4.6 mg/dL Day 5: 4.4 mg/dL Day 3: 4.5 mg/dL Day 6: 4.5 mg/dL - Given that the controls were within range each day - what is a probable explanation for
pCO2
CK-MB
specimen exposure to light
lipase
22. 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
run a new set of controls
cholesterol normal triglycerides elevated
creatinine clearance
effluent line is obstructed
23. On immunoassays using enzyme-labeled antibodies or antigens: ___________ can be carried out with a spectrophotometer
benzoylecogine
intestinal malabsorption
endosmosis
quantitation of label
24. Spectrophotometers isolate a narrow band pass by means of...
90%
run a new set of controls
Tangier
prisms and grating
25. Pregnant women with symptoms of thirst - frequent urination - or unexplained weight loss should have this test performed?
glucose tolerance test
creatinine clearance
chloride
intestinal malabsorption
26. 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?
270
draw blood for glucose and discontinue test
TSH
fall in pH - rise in pCO2
27. Aminotransferase enzymes catalyze the...
GGT
pO2 increased HCO3 decreased
3500
exchange of amino and keto groups
28. Most automated blood gas analyzers directly measure...
obstructive jaundice
pH pCO2 pO2
iron deficiency anemia
coulometry
29. Beriberi is associated with deficiency of...
atomic absorption
thiamine
coulometry
3500
30. Four children are admitted with malaise - anorexia - and abdominal pain. Further evaluations reveal mild anemia - erythrocyte basophilic stippling - and profound pica habits. Poisoning by which heavy metal is most likely responsible?
Hb S
LDH
Tay-sachs
lead
31. 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...
standard
3500
without a disease with a negative test result
<45
32. An emphysema patient suffering from fluid accumulation in the alveolar spaves is likely to be in what metabolic state?
amylase
respiratory ACIDOSIS
5mg higher
boderline results test should be repeated
33. Malic dehydrogenase is added to the aspartate aminotransaminase (AST) reaction to catalyze the conversion of...
oxalacetate to malate
parathyroid hormone
porphobilinigen SCREEN
glass
34. A breakdown product of hemoglobin is...
bilirubin
electric current
prostate
1:5
35. The first step to be taken when attempting to repair a piece of electronic equipment is...
CK
draw blood for glucose and discontinue test
turn off
glucose
36. Nephelometers measure light...
atomic absorption
scattered at a right angle
turn off
sodium potassium chloride CO2
37. A test request slip indicates that an acute porphyric attack is suspected clinically. Analysis should include...
porphobilinigen SCREEN
5
intestinal malabsorption
benzoylecogine
38. 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
Mg
monitoring the course of a known cancer
Tay-sachs
pH pCO2 pO2
39. An increase in serum acetone is indicative of a defect in the metabolism of...
sodium
chylomicrons
carbs
peroxidase-like activity of hemoglobin
40. Amniotic fluid submitted for a lecithin/sphingomyelin (US) ratio has been left in a brown container since the night before. You would expect...
low pH
decreased lecithin
intestinal malabsorption
(testing of urine for) delta-am.. acid
41. The preparation of a patient for standard tolerance testing should include...
high carbohydrate diet for 3 days
intestinal malabsorption
fraction absorbed into systemic circulation
GLC
42. Maple syrup urine disease is characterized by an increase in this urinary amino acids
valine leucine isoleucine
atomic absorption
digoxin
LDH
43. 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
sharp cutoff filter
bilirubin
conjugated hyperbilirubinemia - hepatocellular obstruction
Mg
44. In spectrophotometric determination - this is the formula for calculating the absorbance of a solution
LDL
absorptivity x light path x concentration
2-log(T)
decreased lecithin
45. The ability of a procedure to measure only the component(s) it claims to measure is called...
catalyze redox reactions
corticosterone
specificity
glycerol
46. 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
occult blood
albumin
fall in pH - rise in pCO2
47. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
measures one ion more than others
remove excess unbound iron
viral hepatitis
glass
48. These enzymes of heme biosynthesis are inhibited by lead
porphobilinogen synthetase
valine leucine isoleucine
run a new set of controls
viral hepatitis
49. A serum potassium is 19.5 mg/100 mL. This value is equal to how many mEq/L (MW of K = 39)?
phenytoin
5
fall in pH - rise in pCO2
correct for variations in light intensity
50. The stimulant that causes localized sweating for the sweat test is...
pilocarpine
can be used for absorbtion - partition - ion exchange - and gel permeation chromatography
cancel test
obstructive jaundice