Mock test Set-7

 

Mock Test

Q1. Which of the following is the primary advantage of using Gas Chromatography-Mass Spectrometry (GC-MS) over Gas Chromatography (GC) alone in forensic toxicology?

   A) GC-MS has higher throughput.

   B) GC-MS provides more detailed information about the chemical structure of compounds.

   C) GC-MS is less expensive.

   D) GC-MS requires less sample preparation.

 

   Answer: B) GC-MS provides more detailed information about the chemical structure of compounds.

Explanation: GC-MS combines the separation capabilities of GC with the structural identification capabilities of MS. This provides detailed information about the molecular structure and mass of compounds, making it highly effective for identifying complex substances.

 

Q2. In forensic entomology, which insect stage is most commonly used to estimate the minimum postmortem interval (PMI)?

    A) Egg

    B) Larva

    C) Pupa

    D) Adult

 

   Answer: B) Larva

Explanation: The larval stage of blowflies is crucial in forensic entomology for PMI estimation. The developmental stages of larvae are well-documented, and their presence on a corpse can provide accurate estimates of the time since death.

 

Q3. Which forensic method involves the use of isotopic signatures to trace the geographical origin of a substance?

   A) Infrared Spectroscopy

   B) Isotope Ratio Mass Spectrometry (IRMS)

   C) Gas Chromatography

   D) Atomic Absorption Spectroscopy

 

   Answer: B) Isotope Ratio Mass Spectrometry (IRMS)

Explanation: IRMS measures the ratios of stable isotopes in substances. These isotopic signatures can be used to trace the geographical origin of materials such as drugs, food, or environmental samples, providing valuable forensic evidence.

 

Q4. In forensic pathology, which of the following is a common indicator of drowning in a victim?

    A) Hypostasis

    B) Diatoms in the lungs

    C) Rigor mortis

    D) Postmortem lividity

 

   Answer: B) Diatoms in the lungs

Explanation: Diatoms are microscopic algae found in aquatic environments. Their presence in the lungs of a drowning victim can help confirm drowning as the cause of death, as they are typically not present in the lungs of non-drowning victims.

 

Q5. What is the primary purpose of using an "alternative light source" (ALS) in crime scene investigations?

   A) To enhance visibility of bloodstains

   B) To determine the age of evidence

   C) To detect trace evidence and bodily fluids not visible to the naked eye

   D) To analyze gunshot residue

 

   Answer: C) To detect trace evidence and bodily fluids not visible to the naked eye

Explanation: ALS uses various wavelengths of light to make certain substances fluoresce. This is particularly useful for detecting trace evidence such as fibers, bodily fluids, and other materials that are not visible under normal lighting conditions.

 

Q6. In the context of forensic linguistics, which method is used to analyze an individual's writing style and determine authorship?

   A) Phonetic Analysis

   B) Stylistic Analysis

   C) Lexical Semantics

   D) Syntactic Parsing

 

   Answer: B) Stylistic Analysis

Explanation: Stylistic analysis examines an individual's unique writing style, including word choice, sentence structure, and grammatical patterns, to determine authorship. This method is used to link written documents to specific individuals.

 

Q7. Which type of forensic evidence is most likely to be analyzed using Fourier Transform Infrared Spectroscopy (FTIR)?

    A) Blood

    B) Glass fragments

    C) Gunshot residue

   D) Hair

 

    Answer: B) Glass fragments

Explanation: FTIR is effective for analyzing the chemical composition of materials like glass fragments. It provides detailed information about the molecular structure and composition, aiding in the comparison and identification of glass samples.

 

Q8. In forensic anthropology, what is the primary purpose of determining the "biological profile" of skeletal remains?

   A) To reconstruct the crime scene

   B) To identify the victim’s socioeconomic status

   C) To estimate the age, sex, ancestry, and stature of the individual

   D) To determine the cause of death

 

   Answer: C) To estimate the age, sex, ancestry, and stature of the individual

Explanation: The biological profile is used to provide demographic information about skeletal remains, which helps in identifying the individual and narrowing down potential matches.

 

Q9. What is the primary forensic use of the polymerase chain reaction (PCR) technique?

   A) To detect trace evidence

   B) To amplify small quantities of DNA

    C) To analyze bloodstains

    D) To match fingerprints

 

   Answer: B) To amplify small quantities of DNA

Explanation: PCR is used to amplify minute amounts of DNA, making it possible to analyze and identify genetic material even from degraded or limited samples. This is crucial for forensic investigations where DNA samples might be scarce.

 

Q10. In the study of blood spatter patterns, what does the term "impact spatter" refer to?

    A) Blood spatters resulting from a projectile impact

    B) Blood patterns created by an object striking a surface

    C) Blood patterns formed by blood falling from a height

    D) Bloodstains caused by surface tension

 

    Answer: B) Blood patterns created by an object striking a surface

Explanation: Impact spatter refers to blood patterns created when an object impacts a blood source, causing the blood to be ejected outward from the point of impact. These patterns can provide information about the nature of the impact and the force involved.

Content Writer:- Srishti Dutta