Forensic Medicine Practice

20 learning units • 10 questions per unit • 200 explained questions

Module 04 — Scene Examination, Specimens & Chain of Custody

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Question 01 • Single best answer

What should be recorded when resuscitation changes a scene?

A. Only the scene after cleanup with no explanation B. A reconstructed original scene presented as observed C. The intervention and resulting changes D. Nothing because treatment makes evidence irrelevant

Question 02 • Single best answer

What does a positive presumptive blood test establish by itself?

A. A screening reaction requiring appropriate confirmation B. The donor's identity C. The exact time of deposition D. Proof of the alleged offence

Question 03 • Single best answer

Why should gloves be changed between handling separate biological exhibits?

A. To increase DNA concentration artificially B. To make every test legally admissible C. To replace the need for separate packaging D. To reduce cross-contamination

Question 04 • Single best answer

Which record is essential in chain of custody?

A. The examiner's personal opinion of guilt B. A list of unrelated previous cases C. The market value of the container alone D. Documented transfers with identities, timing and seal condition

Question 05 • Single best answer

Why is formalin not a universal specimen preservative?

A. It preserves every analyte without change B. It replaces refrigeration in every circumstance C. It identifies the donor automatically D. It can interfere with analyses such as many toxicology tests

Question 06 • Single best answer

A custody transfer was not recorded at the time. What is the best response?

A. Invent a plausible signature and time B. Disclose the gap and document verified corrective information C. Discard all other notes secretly D. Assume the seal proves every transfer

Question 07 • Single best answer

What is the main purpose of a tamper-evident seal?

A. To show potential interference with packaging B. To prove a suspect's intent C. To determine specimen age D. To substitute for laboratory validation

Question 08 • Single best answer

How should damp biological evidence be managed?

A. According to specimen-specific drying, packaging and laboratory instructions B. Always sealed wet in any plastic bag indefinitely C. Mixed with all other samples to save space D. Fixed in formalin regardless of analysis

Question 09 • Single best answer

Why may a negative forensic screen not exclude an exposure?

A. A negative screen always proves no exposure B. The analyte may be outside the assay or detection window C. Every assay detects all substances forever D. Chain-of-custody labels prevent false negatives

Question 10 • Single best answer

What should a report distinguish when evaluating a glass fragment?

A. A source identity assumed from visual color alone B. The suspect's motive inferred from refractive index C. Observed properties and the qualified strength of comparison D. The exact injury time from fragment weight