BSFS Bachelor of Science in Forensic Science MCQ 5 — Questions and Answers
Question 1: Which type of wound is most characteristic of a close-range gunshot (contact or near-contact)?
- A clean circular entry wound with no additional marks
- Stellate or star-shaped wound with soot and stippling (Correct answer)
- A large exit wound with no entry wound features
- A wound with extensive stippling but no soot
Correct answer: Stellate or star-shaped wound with soot and stippling
Contact or near-contact gunshots produce stellate tears, heavy soot deposition, and burns around the wound from expanding gases and unburned powder.
Question 2: In forensic chemistry, what is the purpose of the Scott test?
- Presumptive identification of opioids
- Presumptive identification of cocaine (Correct answer)
- Confirmatory test for methamphetamine
- Detection of cannabis (THC)
Correct answer: Presumptive identification of cocaine
The Scott test uses cobalt thiocyanate and produces a blue color in the presence of cocaine, serving as a presumptive field test.
Question 3: What is the significance of the 'void pattern' in bloodstain pattern analysis?
- It indicates the point of origin of blood droplets
- It marks an area where blood is absent because an object or person blocked the spatter (Correct answer)
- It represents arterial blood that missed the primary target
- It shows where blood was diluted with water
Correct answer: It marks an area where blood is absent because an object or person blocked the spatter
A void pattern is an area where blood spatter is absent because an object or person was present and shielded that area during the bloodshed event.
Question 4: In digital forensics, what is 'steganography'?
- The study of handwritten messages
- Hiding data within another file, image, or message to conceal its existence (Correct answer)
- Encrypting files with a secret key
- The forensic recovery of deleted files
Correct answer: Hiding data within another file, image, or message to conceal its existence
Steganography is the practice of concealing data within another seemingly innocuous file (such as an image or audio file) so that the hidden message is not apparent.
Question 5: Which analytical technique is considered the gold standard for confirming the identity and purity of an unknown substance in forensic chemistry?
- Color (colorimetric) tests
- Infrared spectroscopy (IR) or mass spectrometry (MS) (Correct answer)
- Thin-layer chromatography (TLC)
- Immunoassay testing
Correct answer: Infrared spectroscopy (IR) or mass spectrometry (MS)
Infrared spectroscopy and mass spectrometry provide confirmatory identification of unknown substances by revealing their molecular structure and fragmentation patterns.
Question 6: In forensic pathology, 'petechiae' found in the eyes and skin most commonly suggest what manner of death?
- Drowning
- Asphyxia or strangulation (Correct answer)
- Poisoning
- Blunt force trauma to the head
Correct answer: Asphyxia or strangulation
Petechial hemorrhages (small pinpoint hemorrhages) in the conjunctivae and skin are a classic sign of asphyxia caused by increased venous pressure, often seen in strangulation.
Question 7: What is the role of a forensic scientist when testifying in court?
- To advocate for the prosecution's theory of the case
- To present objective, impartial scientific findings and their significance to the trier of fact (Correct answer)
- To determine the guilt or innocence of the defendant
- To interpret legal statutes for the judge
Correct answer: To present objective, impartial scientific findings and their significance to the trier of fact
Forensic scientists serve as expert witnesses who present objective, scientific findings impartially to assist the judge or jury in understanding the evidence.
BSFS Bachelor of Science in Forensic Science MCQ 5
Which type of wound is most characteristic of a close-range gunshot (contact or near-contact)?