ABFM Technology & Digital Tools 3

Question 1

In forensic DNA analysis, what is the purpose of the polymerase chain reaction (PCR) step?

Accepted Answer

To amplify small quantities of DNA to detectable levels

Answer

PCR exponentially amplifies targeted DNA regions from minute samples, enabling analysis of trace biological evidence that would otherwise be insufficient for profiling.

Question 2

A forensic examiner is analyzing electronic communications. Which metadata element from an email header is most critical for establishing a timeline of events?

Accepted Answer

UTC timestamp with time zone offset

Answer

UTC timestamps with time zone offsets provide an absolute, unambiguous chronological record of when an email was sent or relayed, critical for establishing accurate event timelines.

Question 3

Which imaging modality provides the best soft tissue detail in post-mortem forensic radiology for detecting cause of death in decomposed remains?

Accepted Answer

Magnetic resonance imaging (MRI)

Answer

Post-mortem MRI provides superior soft tissue contrast compared to CT, making it valuable for detecting brain injuries, organ pathology, and cause of death even in partially decomposed remains.

Question 4

In digital evidence handling, what is the purpose of generating an MD5 or SHA-256 hash of a forensic image?

Accepted Answer

To verify the image is an exact, unaltered copy of the original

Answer

Cryptographic hashes create a unique digital fingerprint of the forensic image that can be recalculated at any time to prove the data has not been altered since acquisition.

Question 5

Which spectroscopic technique is used to identify chemical compounds in trace evidence at the scene without destroying the sample?

Accepted Answer

Attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR)

Answer

ATR-FTIR is a non-destructive technique that identifies compounds by their infrared absorption patterns, ideal for analyzing trace evidence without consuming the sample.

(ABFM) American Board of Forensic Medicine Certification Practice Test

(ABFM) American Board of Forensic Medicine Certification Practice Test

ABFM Technology & Digital Tools 3