BSFS Bachelor of Science in Forensic Science MCQ 2 — Questions and Answers
Question 1: Which type of fingerprint pattern is the most common among the general population?
- Arch
- Loop (Correct answer)
- Whorl
- Composite
Correct answer: Loop
Loops account for approximately 60-65% of all fingerprint patterns, making them the most common.
Question 2: In forensic toxicology, what does 'postmortem redistribution' refer to?
- The spread of drugs through the bloodstream during life
- The movement of drugs from tissues into blood after death (Correct answer)
- The metabolism of alcohol in the liver postmortem
- The diffusion of toxins through the skin after burial
Correct answer: The movement of drugs from tissues into blood after death
Postmortem redistribution is the movement of drugs from organs and tissues into blood after death, which can complicate interpretation of blood drug concentrations.
Question 3: What is the Locard Exchange Principle?
- Every criminal leaves a unique DNA signature
- Every contact between two objects results in a transfer of material (Correct answer)
- Physical evidence cannot be destroyed, only moved
- Criminals always return to the scene of the crime
Correct answer: Every contact between two objects results in a transfer of material
Edmond Locard's principle states that every contact between two objects results in a mutual transfer of trace materials.
Question 4: Which method is most commonly used to determine the caliber of a bullet recovered from a crime scene?
- Mass spectrometry
- Physical measurement with a micrometer (Correct answer)
- Neutron activation analysis
- Gas chromatography
Correct answer: Physical measurement with a micrometer
A micrometer or caliper is used to physically measure the diameter of a bullet to determine its caliber.
Question 5: In forensic entomology, which insect stage is most useful for estimating the minimum postmortem interval (PMI)?
- Adult beetles
- Oldest larval stage or empty puparia (Correct answer)
- Freshly laid eggs
- Flying blow flies observed at the scene
Correct answer: Oldest larval stage or empty puparia
The oldest larval stage or empty puparia indicates the maximum time since colonization began, establishing the minimum PMI.
Question 6: What is the primary purpose of a control sample in forensic DNA analysis?
- To increase the quantity of DNA available for testing
- To verify that the laboratory process worked correctly and detect contamination (Correct answer)
- To establish the victim's identity
- To compare the suspect's DNA to a reference database
Correct answer: To verify that the laboratory process worked correctly and detect contamination
Control samples (positive and negative) verify that the PCR amplification and analysis process functioned correctly and that no contamination occurred.
Question 7: Which type of glass fracture pattern results from a low-velocity impact?
- Concentric fractures only
- Radial fractures only
- Both radial and concentric fractures, with radial first (Correct answer)
- Stress fractures with no clear pattern
Correct answer: Both radial and concentric fractures, with radial first
A low-velocity impact creates radial fractures first, followed by concentric fractures as the glass continues to fail under stress.
BSFS Bachelor of Science in Forensic Science MCQ 2
Which type of fingerprint pattern is the most common among the general population?