BOC CHEMISTRY QUESTIONS WITH
COMPLETE ANSWERS [ GRADED A+]
Which of the following elevates carboxyhemoglobin?
a. nitrite poisoning
b. exposure to carbon monoxide
c. sulfa drug toxicity
d. sickle cell anemia - ✔✔b
The reason carbon monoxide is so toxic is because it:
a. is a protoplasmic poison
b. comibines with cytochrome oxidase
c. has 200 times the affinity of oxygen for hemoglobin binding sites
©morren2024/2025.Year published 2024.
,d. sensitizes the myocardium - ✔✔c
Cocain is metabolized to:
a. carbamazepinne
b. codeine
c. hydrocodone
d. benzoylecgonine - ✔✔d
The metabolite 11-nor-etrahydrocannabinol-9-COOH- can be detected by
immunoassay 3-5 days after a single use of:
a. methamphetamine
b. cocaine
c. benzodiazepine
d. marijuana - ✔✔d
©morren2024/2025.Year published 2024.
,A 3 year old child was evaluated for abdominal pain and anorexia by a physician.
A CBC revealed a hemoglobin of 9.8 g/dL and basophilic stippling of the RBCs. The
doctor should order further tests to check for poisoning from:
a. arsenic
b. iron
c. mercury
d. lead - ✔✔d
Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful
to assess blood concentration of:
a. lead
b. mercury
c. arsenic
d. beryllium - ✔✔a
A salicylate level is performed to detect toxicity caused by ingestion of excess:
©morren2024/2025.Year published 2024.
, a. acetominophen
b. aspirin
c. ibuprofen
d. pseudoephedrine - ✔✔b
Testing for the diagnosis of lead poisoning should include:
a. erythrocyte protoporphyrin (EPP)
b. urine delta-aminolevulinic acid
c. whole blood lead
d. zinc protoporphryin (ZPP) - ✔✔c
Upon development of a thin layer chromatogram for the drug analysis, all drug
spots (including the standards) had migrated with the solvent front. The most
probable cause for this would be:
a. environmental temperature too warm
b. incorrect aqueous to non aqueous solvent mixture
©morren2024/2025.Year published 2024.
COMPLETE ANSWERS [ GRADED A+]
Which of the following elevates carboxyhemoglobin?
a. nitrite poisoning
b. exposure to carbon monoxide
c. sulfa drug toxicity
d. sickle cell anemia - ✔✔b
The reason carbon monoxide is so toxic is because it:
a. is a protoplasmic poison
b. comibines with cytochrome oxidase
c. has 200 times the affinity of oxygen for hemoglobin binding sites
©morren2024/2025.Year published 2024.
,d. sensitizes the myocardium - ✔✔c
Cocain is metabolized to:
a. carbamazepinne
b. codeine
c. hydrocodone
d. benzoylecgonine - ✔✔d
The metabolite 11-nor-etrahydrocannabinol-9-COOH- can be detected by
immunoassay 3-5 days after a single use of:
a. methamphetamine
b. cocaine
c. benzodiazepine
d. marijuana - ✔✔d
©morren2024/2025.Year published 2024.
,A 3 year old child was evaluated for abdominal pain and anorexia by a physician.
A CBC revealed a hemoglobin of 9.8 g/dL and basophilic stippling of the RBCs. The
doctor should order further tests to check for poisoning from:
a. arsenic
b. iron
c. mercury
d. lead - ✔✔d
Zinc protoporphyrin or free erythrocyte protoporphyrin measurements are useful
to assess blood concentration of:
a. lead
b. mercury
c. arsenic
d. beryllium - ✔✔a
A salicylate level is performed to detect toxicity caused by ingestion of excess:
©morren2024/2025.Year published 2024.
, a. acetominophen
b. aspirin
c. ibuprofen
d. pseudoephedrine - ✔✔b
Testing for the diagnosis of lead poisoning should include:
a. erythrocyte protoporphyrin (EPP)
b. urine delta-aminolevulinic acid
c. whole blood lead
d. zinc protoporphryin (ZPP) - ✔✔c
Upon development of a thin layer chromatogram for the drug analysis, all drug
spots (including the standards) had migrated with the solvent front. The most
probable cause for this would be:
a. environmental temperature too warm
b. incorrect aqueous to non aqueous solvent mixture
©morren2024/2025.Year published 2024.
