ABT Forensic Toxicology

Question 1

In postmortem toxicology, which phenomenon describes the redistribution of drugs from concentrated tissues (liver, lung) into blood after death?

Accepted Answer

Postmortem redistribution (PMR)

Answer

Hepatic first-pass effect

Answer

Autolysis-mediated degradation

Answer

Putrefactive synthesis

Question 2

Which matrix is preferred for documenting historical drug exposure over weeks to months in forensic investigations?

Accepted Answer

Hair

Answer

Blood

Answer

Urine

Answer

Vitreous humor

Question 3

Chain of custody in forensic toxicology is essential primarily to:

Accepted Answer

Document sample handling to preserve legal admissibility of results

Answer

Ensure specimen temperature is maintained during transport

Answer

Prevent evaporation of volatile analytes

Answer

Satisfy CLIA laboratory certification requirements only

Question 4

Vitreous humor is a preferred postmortem specimen for ethanol analysis because it:

Accepted Answer

Is less subject to postmortem ethanol production by microorganisms

Answer

Contains higher ethanol concentrations than blood

Answer

Provides the longest window of detection for alcohol

Answer

Is easier to collect than peripheral blood

Question 5

Which confirmatory analytical technique is considered the 'gold standard' for forensic drug identification?

Accepted Answer

Gas chromatography-mass spectrometry (GC-MS)

Answer

Immunoassay (ELISA)

Answer

High performance liquid chromatography (HPLC-UV)

Answer

Thin-layer chromatography (TLC)

Question 6

In driving under the influence (DUI) cases, the per se legal limit for blood alcohol concentration (BAC) for non-commercial drivers in all US states is:

Accepted Answer

0.08 g/dL

Answer

0.05 g/dL

Answer

0.10 g/dL

Answer

0.02 g/dL