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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. 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...
inhibitor binds to enzyme at same site as substrate
obstructive jaundice
heparin
65
2. Calcium concentration in the serum is regulated by...
parathyroid hormone
correct for variations in light intensity
agarose
glucose
3. The osmolality of a urine or serum specimen is measured by a change in the...
freezing point
methadone
wavelength
changes in the fuel
4. This serum constituent is unstable if a blood specimen is left standing at room temperature for 8 hours before processing
glucose
albumin
4.5
low pH
5. This is a characteristic shared by lactate dehydrogenase - malate dehydrogenase - isocitrate dehydrogenase - and hydroxybutyrate dehydrogenase?
alpha 2 beta
beta
hepatobiliary (obstruction?)
catalyze redox reactions
6. A low concentrarion of serum phosphorus is commonly found in...
glass
carbohydrate hyperalimentation
accuracy
CO2 and pH elevated
7. The greatest activities of serum AST and ALT are seen in...
faster than gamma
2Na + glucose over 20 + BUN over 3
acute hepatitis
Calcium - phosphorus
8. In the assay of lactate dehydrogenase - this product is actually measured
respiratory acidosis
methadone
NADH
atomic absorption
9. Cocaine is metabolized to...
CK-MB
CO2 and pH elevated
fresh morning urine for delta-aminolevulinic acid
benzoylecogine
10. Turbidity in serum suggests elevation of...
chylomicrons
dirty applicators
the fetus is at risk for respiratory distress
specimen exposure to light
11. Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are both elevated in this disease
whole blood can be used
agarose
viral hepatitis
lipase
12. A chemiluminescent EIA...
Calcium - phosphorus
monitoring the course of a known cancer
nephelometry
is quantitated by the amount of light produced
13. One means of checking a spectrophotometer wavelength calibration in the visible range is by using a...
CML
porphobilinigen SCREEN
crigler
didymium filter
14. Specimens for blood gas determination should be drawn into a syringe containing...
heparin
alkaline picrate
emphysema
acute hepatitis
15. The general types of interference in atomic absorption spectrophotometry...
show a decrease in glycosylated hgb
WITHOUT a disease with a negative test
methyl alcohol
chemical ionization matrix
16. The most widely used support medium for electrophoretic separation of lipoproteins is...
increased O2 decreased HCO3
agarose
parathyroid
2Na + glucose over 20 + BUN over 3
17. Following overnight fasting - hypoglycemia in adults is defined as a glucose of...
<45
sharp cutoff filter
CO2 and pH elevated
exposure to CO
18. Acidosis and alkalosis are best defined as fluctuations in blood pH and CO2 content due to changes in...
is quantitated by the amount of light produced
band width
bicarbonate buffer
Temperature is a function of the number of particles in solution
19. A patient in her 33rd week of pregnancy is hospitalized with toxemia. Her doctor would like to deliver the baby early because the toxemia is becoming more severe. The baby's best chance of delivery without respiratory distress due to lung immaturity
alpha 2 beta
faster than gamma
BUN increased
L/S ratio > 3.5
20. 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)
cancel test
obstructive jaundice
improving state of metabolic control (as indicated by fructosamine)
lead
21. This lipid results would be expected to be falsely elevated on a serum specimen from a nonfasting patient
minimize the effects of interference
enzyme induction
trig
CK
22. 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?
run a new set of controls
5
sample exposed to light
no decrease in serum growth hormone after 90 minutes
23. Measurement of total T4 by competitive protein binding or displacement is based on the specific binding properties of...
T4 by RIA
thyroxine binding globulin
Calcium - phosphorus
measures one ion more than others
24. The unit of measure for a standard solution is...
impaired response to ACTH stimulation
lower than in adults
triglycerides
mg/ml
25. Quantitation of NA+ and K+ by ion-selective electrode is more rapid than flame photometry because...
whole blood can be used
faster than gamma
fetal and placenta function
O2
26. Bromcresol purple at a pH of 5.2 is used in a colorimetric method to measure...
CML
1:5
potassium dichromate in SA
albumin
27. 4 mL of water is added to 1 mL of serum. This represents this serum dilutions
1:5
adding an acid stabilizer
plasma bicarbonate
acid phosphatase
28. 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...
GLC
parathyroid hormone
32
decreased lecithin
29. 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...
parathyroid
boderline results test should be repeated
Calcium - phosphorus
3500
30. In monitoring glomerular function - this test has the highest sensitivity
creatinine clearance
5mg higher
breast cancer
WITHOUT a disease with a negative test
31. In the immunoinhibition phase of the CK-MB procedure...
M subunit is inactivated
brain
absorptivity x light path x concentration
serum aliquots - one heated
32. Maple syrup urine disease is characterized by an increase in this urinary amino acids
acute intermittent porphyria
valine leucine isoleucine
(testing of urine for) delta-am.. acid
BUN increased
33. If the correlation coefficient (r) of two variables is zero...
there is an absence of correlation
ionization of carboxyl groups (yielding a net negative charge)
chylomicrons VLDL
5 tri 15 cholesterol 50 protein
34. Bile acid concentrations are useful to assess...
peptide bonds
spun separated iced and tested immediately
hepatobiliary (obstruction?)
lead
35. This elevates carboxyhemoglobin?
exposure to CO
32
respiratory ACIDOSIS
4.5
36. Which percentage of total serum calcium is nondiffusible protein bound?
40-50
enzyme induction
hyperthyroidism
pH pCO2 pO2
37. Before unconjugated bilirubin can react with Ehrlich's diazo reagent - this must be added
a small concentration of APO-B containing lipoproteins after precipitation
cmpds based on molecular weight and size
the fetus is at risk for respiratory distress
methyl alcohol
38. In automated methods utilizing a bichromatic analyzer - dual wavelengths are employed to...
minimize the effects of interference
act as carriers for ions
lactic acidosis
3500
39. As part of a hyperlipidemia screening program - the following results were obtained on a 25 year old woman 6 hours after eating:Triglycerides = 260 mg/dLCholesterol = 120 mg/dL - This is the BEST interpretation of these results?
LDH
BUN increased
Tay-sachs
cholesterol normal triglycerides elevated
40. The fast hemoglobin fraction is...
A1
impaired response to ACTH stimulation
1 mol/kg
128
41. The most heat labile fraction of alkaline phosphatase is obtained from...
bone
endogenous triglycerides
thiamine
BUN 80
42. High levels of which lipoprotein class are associated with decreased risk of accelerated atherosclerosis?
sharp fibrinogen peak
1:5
HDL
primidone
43. In an internal standard flame photometer - the internal standard is used to...
sharp fibrinogen peak
correct for variations in flame and atomizer
ceruplasmin
normal - liver breakdown
44. To ensure an accurate ammonia level result - the specimen should be...
atomic absorption
fetal and placenta function
spun separated iced and tested immediately
0
45. Serum anion gap is increased in patients with...
lactic acidosis
pituitary
parathyroid
pH = pKa + log (salt/acid)
46. Most drugs and intracellular metabolites measured by radioimmunoassay have molecular weights between 200 and 1000 and can be made immunogenic by...
measures one ion more than others
acid phosphatase
attaching them to protein molecules
hemolysis
47. The principle of the occult blood test depends on the...
diet
breast cancer
cmpds based on molecular weight and size
peroxidase-like activity of hemoglobin
48. Which two conditions can "physiologically" elevate serum alkaline phosphatase?
1.9
fall in pH - rise in pCO2
growth - third trimester of pregnancy
properties of the membrane
49. Lasting serum phosphate concentration is controlled primarily by the...
the same as plasma glucose
fraction absorbed into systemic circulation
5 tri 15 cholesterol 50 protein
parathyroid
50. This diseases results from a familial absence of high-density lioprotein
Tangier
manic-depression
changes in the fuel
properties of the membrane