AAB CHEMISTRY EXAM QUESTIONS
AND ANSWERS 2025
In the classic Schales-Schales (mercurimetric titration) method for chloride, what
substance reacts with the indicator to form a violet color? a. AgCl2 b. excess Hg с. ferric
nitrate d. mercuric thiocyanate - ANSWERSB excess Hg
4%-10% beta-globulin, and 45% If an electrophoretic pattern shows 30 % albumin, 4 %-
10 % alpha-globulin, gamma-globulin, then what condition may exist in the patient? a.
cirrhosis b. inflammation c. nephrotic syndrome d. monoclonal gammopathy -
ANSWERSd. monoclonal gammopathy
A 40-year-old male has a random glucose of 470 mg/dL. This lab finding is consistent
with which one of the following clinical conditions? a. glycogen storage disease b.
diabetes insipidus c. diabetes mellitus d. insulinoma - ANSWERSc. diabetes mellitus
A glitter cell is a term used to describe a specific type of which one of the following? a.
leukocyte b. fat droplet c. lysed red cell d. oval fat body - ANSWERSleukocyte
A granular cast is thought to represent the decomposition of which of these casts? a.
cellular b. hyaline C. waxy d. fatty - ANSWERScellular
A high alkaline phosphatase level in the presence of other negative liver function tests is
indicative of which disorder? a. bone disorder b. viral hepatitis C. prostate cancer d.
ectopic pregnancy - ANSWERSa. bone disorder
A labor and delivery patient with preeclampsia is being treated for premature
contractions. Which one of the following is the most likely laboratory finding? a.
hyponatremia b. hyperkalemia c. hypocalcemia d. hypermagnesemia -
ANSWERShypermagnesemia
A low parathyroid hormone level will cause which of the following? a. high urine calcium
b. low serum calcium c. high serum calcium d. low serum phosphorus - ANSWERSlow
serum calcium
A potassium result of 6.8 mmol/L is obtained from a dialysis patient. Before reporting
this result, what is the most appropriate action? a. check for hemolysis b. rerun quality
control c. recalibrate potassium d. call the critical result - ANSWERScheck for hemolysis
A smoky red-brown urine should be suspected of containing which of the following? a.
bilirubin b. erythrocytes c. porphyrins d. urobilinogen - ANSWERSerythrocytes
,A urine that turns brown-black upon standing may contain which substance? a.
homogentisic acid b. myoglobin c. porphyrin d. erythrocytes - ANSWERShomogentisic
acid
All of the following are glycoproteins EXCEPT which one? a. ceruloplasmin b. follicle-
stimulating hormone c. fibrinogen d. cryoglobulin - ANSWERSd. cryoglobulin
All of the following can cause low chloride levels EXCEPT which one? a. diabetic
acidosis b. renal failure c. prolonged vomiting d. dehydration - ANSWERSdehydration
All of the following regulate calcium levels EXCEPT which one? a. vitamin D b.
calcitonin c. aldosterone d. parathyroid hormone - ANSWERSaldosterone
All of the following specimens can be analyzed for carbon dioxide EXCEPT which one?
a. urine b. serum c. plasma d. whole blood - ANSWERSa. urine
All of the following tests are good indicators of hypothyroidism EXCEPT which one? a.
FT4 b. TT4 c. s-TSH d. T3 uptake - ANSWERST3 uptake
An elevated creatinine value is most likely to be accompanied by which of these values?
a. normal uric acid b. elevated uric acid, 10X creatinine value c. normal blood urea
nitrogen d. elevated blood urea nitrogen, 10X creatinine value - ANSWERSd. elevated
blood urea nitrogen, 10X creatinine value
An increase in indirect-reacting bilirubin is suggestive of which condition? b. lipid
accumulation a. bile acid reflux d. gammaglobulinopathy c. hemoglobin breakdown -
ANSWERSc. hemoglobin breakdown
An increased CSF IgG index is characteristically seen in which condition? a. traumatic
tap b. multiple sclerosis c. bacterial meningitis d. subarachnoid hemorrhage -
ANSWERSmultiple sclerosis
An LD isoenzyme electrophoretic pattern that shows an increase in LD1, LD2 and LD3
is seen in which disease state? a. renal disease b. pernicious anemia c. acute liver
disease d. myocardial infarction - ANSWERSb. pernicious anemia
A creatinine clearance test is performed. The 24-hour urine volume is 770 mL; serum
creatinine is 2.0 mg/dL and urine creatinine is 240 mg/dL. What is the clearance,
assuming average body surface area? а. 6 mL/minute b. 38 mL/minute c. 64 mL/minute
d. 924 mL/minute - ANSWERSc. 64 mL/minute
Aspartate transaminase is elevated in all of the following conditions EXCEPT which
one? a. myocardial infarction b. muscular dystrophy с. acute pancreatitis d. liver disease
- ANSWERSb. muscular dystrophy
, At a pH of 7.4, most of the phosphorus in the body is in which form? a. bone b.
ATP/ADP c. 2,3 DPG d. DNA/RNA - ANSWERSd. DNA/RNA
Because ionized calcium can be changed without affecting the total calcium level, what
other parameter(s) must be known to properly evaluate calcium? a. vitamin D b.
magnesium c. phosphorus d. pH and protein - ANSWERSpH and protein
Bilirubin is converted in the intestine to which of the following substances? a. bilirubin
diglucuronide b. urobilinogen c. biliverdin d. urobilin - ANSWERSb. urobilinogen
Both porphobilinogen and urobilinogen form a red-colored compound with Ehrlich's
reagent. How can they be differentiated? A. porphobilinogen is soluble in chloroform b.
urobilinogen is soluble in acetic acid c. porphobilinogen is soluble in acetic acid d.
urobilinogen is soluble in chloroform - ANSWERSD. urobilinogen is soluble in
chloroform
A serum protein electrophoretic pattern displaying a beta gamma bridge or broad
gamma is seen in which disease state? a. acute inflammation b. monoclonal
gammopathy c. active cirrhosis d. nephrotic syndrome - ANSWERSc. active cirrhosis
By the urease method, urea is enzymatically converted to which end product? a.
ammonia b. nitrogen c. allantoin carbon d. dioxide - ANSWERSa. ammonia
Casts are formed primarily in which portion of the kidney? a. glomerular capsule b.
distal convoluted tubule c. descending loop of Henle d. proximal convoluted tubule -
ANSWERSdistal convoluted tubule
Catecholamines are secreted by which one of the following? a. kidney b. pituitary c.
adrenal cortex d. adrenal medulla - ANSWERSD. adrenal medulla
Contamination of the glucose reagent with catalase is a problem with which glucose
method? a. alkaline cupric ion reduction b. alkaline ferric ion reduction c. glucose
oxidase d. hexokinase - ANSWERSc. glucose oxidase
Creatine kinase is clinically significant in diseases of which organ? a. pancreas b. liver
c. muscle d. brain - ANSWERSc. muscle
Creatine kinase is frequently elevated in acute myocardial infarction and which other
disorder? a. Duchenne's muscular dystrophy b. acute viral hepatitis c. cirrhosis of the
liver d. Paget's disease - ANSWERSa. Duchenne's muscular dystrophy
Decreased alpha-fetoprotein values are associated with which condition? a. Down
syndrome b. neural tube defects c. spina bifida d. cancer - ANSWERSa. Down
syndrome
AND ANSWERS 2025
In the classic Schales-Schales (mercurimetric titration) method for chloride, what
substance reacts with the indicator to form a violet color? a. AgCl2 b. excess Hg с. ferric
nitrate d. mercuric thiocyanate - ANSWERSB excess Hg
4%-10% beta-globulin, and 45% If an electrophoretic pattern shows 30 % albumin, 4 %-
10 % alpha-globulin, gamma-globulin, then what condition may exist in the patient? a.
cirrhosis b. inflammation c. nephrotic syndrome d. monoclonal gammopathy -
ANSWERSd. monoclonal gammopathy
A 40-year-old male has a random glucose of 470 mg/dL. This lab finding is consistent
with which one of the following clinical conditions? a. glycogen storage disease b.
diabetes insipidus c. diabetes mellitus d. insulinoma - ANSWERSc. diabetes mellitus
A glitter cell is a term used to describe a specific type of which one of the following? a.
leukocyte b. fat droplet c. lysed red cell d. oval fat body - ANSWERSleukocyte
A granular cast is thought to represent the decomposition of which of these casts? a.
cellular b. hyaline C. waxy d. fatty - ANSWERScellular
A high alkaline phosphatase level in the presence of other negative liver function tests is
indicative of which disorder? a. bone disorder b. viral hepatitis C. prostate cancer d.
ectopic pregnancy - ANSWERSa. bone disorder
A labor and delivery patient with preeclampsia is being treated for premature
contractions. Which one of the following is the most likely laboratory finding? a.
hyponatremia b. hyperkalemia c. hypocalcemia d. hypermagnesemia -
ANSWERShypermagnesemia
A low parathyroid hormone level will cause which of the following? a. high urine calcium
b. low serum calcium c. high serum calcium d. low serum phosphorus - ANSWERSlow
serum calcium
A potassium result of 6.8 mmol/L is obtained from a dialysis patient. Before reporting
this result, what is the most appropriate action? a. check for hemolysis b. rerun quality
control c. recalibrate potassium d. call the critical result - ANSWERScheck for hemolysis
A smoky red-brown urine should be suspected of containing which of the following? a.
bilirubin b. erythrocytes c. porphyrins d. urobilinogen - ANSWERSerythrocytes
,A urine that turns brown-black upon standing may contain which substance? a.
homogentisic acid b. myoglobin c. porphyrin d. erythrocytes - ANSWERShomogentisic
acid
All of the following are glycoproteins EXCEPT which one? a. ceruloplasmin b. follicle-
stimulating hormone c. fibrinogen d. cryoglobulin - ANSWERSd. cryoglobulin
All of the following can cause low chloride levels EXCEPT which one? a. diabetic
acidosis b. renal failure c. prolonged vomiting d. dehydration - ANSWERSdehydration
All of the following regulate calcium levels EXCEPT which one? a. vitamin D b.
calcitonin c. aldosterone d. parathyroid hormone - ANSWERSaldosterone
All of the following specimens can be analyzed for carbon dioxide EXCEPT which one?
a. urine b. serum c. plasma d. whole blood - ANSWERSa. urine
All of the following tests are good indicators of hypothyroidism EXCEPT which one? a.
FT4 b. TT4 c. s-TSH d. T3 uptake - ANSWERST3 uptake
An elevated creatinine value is most likely to be accompanied by which of these values?
a. normal uric acid b. elevated uric acid, 10X creatinine value c. normal blood urea
nitrogen d. elevated blood urea nitrogen, 10X creatinine value - ANSWERSd. elevated
blood urea nitrogen, 10X creatinine value
An increase in indirect-reacting bilirubin is suggestive of which condition? b. lipid
accumulation a. bile acid reflux d. gammaglobulinopathy c. hemoglobin breakdown -
ANSWERSc. hemoglobin breakdown
An increased CSF IgG index is characteristically seen in which condition? a. traumatic
tap b. multiple sclerosis c. bacterial meningitis d. subarachnoid hemorrhage -
ANSWERSmultiple sclerosis
An LD isoenzyme electrophoretic pattern that shows an increase in LD1, LD2 and LD3
is seen in which disease state? a. renal disease b. pernicious anemia c. acute liver
disease d. myocardial infarction - ANSWERSb. pernicious anemia
A creatinine clearance test is performed. The 24-hour urine volume is 770 mL; serum
creatinine is 2.0 mg/dL and urine creatinine is 240 mg/dL. What is the clearance,
assuming average body surface area? а. 6 mL/minute b. 38 mL/minute c. 64 mL/minute
d. 924 mL/minute - ANSWERSc. 64 mL/minute
Aspartate transaminase is elevated in all of the following conditions EXCEPT which
one? a. myocardial infarction b. muscular dystrophy с. acute pancreatitis d. liver disease
- ANSWERSb. muscular dystrophy
, At a pH of 7.4, most of the phosphorus in the body is in which form? a. bone b.
ATP/ADP c. 2,3 DPG d. DNA/RNA - ANSWERSd. DNA/RNA
Because ionized calcium can be changed without affecting the total calcium level, what
other parameter(s) must be known to properly evaluate calcium? a. vitamin D b.
magnesium c. phosphorus d. pH and protein - ANSWERSpH and protein
Bilirubin is converted in the intestine to which of the following substances? a. bilirubin
diglucuronide b. urobilinogen c. biliverdin d. urobilin - ANSWERSb. urobilinogen
Both porphobilinogen and urobilinogen form a red-colored compound with Ehrlich's
reagent. How can they be differentiated? A. porphobilinogen is soluble in chloroform b.
urobilinogen is soluble in acetic acid c. porphobilinogen is soluble in acetic acid d.
urobilinogen is soluble in chloroform - ANSWERSD. urobilinogen is soluble in
chloroform
A serum protein electrophoretic pattern displaying a beta gamma bridge or broad
gamma is seen in which disease state? a. acute inflammation b. monoclonal
gammopathy c. active cirrhosis d. nephrotic syndrome - ANSWERSc. active cirrhosis
By the urease method, urea is enzymatically converted to which end product? a.
ammonia b. nitrogen c. allantoin carbon d. dioxide - ANSWERSa. ammonia
Casts are formed primarily in which portion of the kidney? a. glomerular capsule b.
distal convoluted tubule c. descending loop of Henle d. proximal convoluted tubule -
ANSWERSdistal convoluted tubule
Catecholamines are secreted by which one of the following? a. kidney b. pituitary c.
adrenal cortex d. adrenal medulla - ANSWERSD. adrenal medulla
Contamination of the glucose reagent with catalase is a problem with which glucose
method? a. alkaline cupric ion reduction b. alkaline ferric ion reduction c. glucose
oxidase d. hexokinase - ANSWERSc. glucose oxidase
Creatine kinase is clinically significant in diseases of which organ? a. pancreas b. liver
c. muscle d. brain - ANSWERSc. muscle
Creatine kinase is frequently elevated in acute myocardial infarction and which other
disorder? a. Duchenne's muscular dystrophy b. acute viral hepatitis c. cirrhosis of the
liver d. Paget's disease - ANSWERSa. Duchenne's muscular dystrophy
Decreased alpha-fetoprotein values are associated with which condition? a. Down
syndrome b. neural tube defects c. spina bifida d. cancer - ANSWERSa. Down
syndrome
