🏛️ JKSSB • 🔬 Home Department (Forensic Science Laboratory)
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🔬 Forensic Science🧬 Biology⚗️ Chemistry⚛️ Physics⚖️ Law🏗️ Civil Engineering🔢 Math
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1
🔬 Forensic ScienceForensic Principles
Consider the following principles of forensic science:
i. Not all contact leaves a trace
ii. Two different things can be compared
iii. Everything is unique
iv. Change is the only constant
Which of the above statements is true/correct?
2
🧬 BiologyBiometrics
AFIS is an automated system for storing and matching which of the following biometrics?
3
🧬 BiologyForensic Biology
Which of the following statement is FALSE?
4
⚗️ ChemistryBiochemistry
A heme molecule is also called
5
⚗️ ChemistryBiochemistry
At what linkage does Human Salivary Amylase cleave in the starch molecule?
6
🧬 BiologyForensic Biology
What are the predominant lactate dehydrogenase isozymes present in menstrual blood?
7
🧬 BiologyForensic Biology
What is examined in the hair root sheath for sex determination?
8
🧬 BiologyDNA Profiling
A preferred procedure for analysing DNA in cases of sexual assault involving multiple unrelated perpetrators would be:
9
🔬 Forensic ScienceForensic Law
In 1993, the U. S. Supreme court set forth a nonexclusive checklist for trial courts to use in assessing the reliability of scientific expert testimony, such as standards and controls, testing, peer review, error rate etc. What was this admissibility standard named?
10
🧬 BiologyMitochondrial DNA
What is the most polymorphic region in human mitochondrial DNA?
11
🧬 BiologyAnatomy
What is the major organic component of the bone matrix?
12
🧬 BiologyGenetics
In maize, a dominant allele (A) is necessary for seed color, as opposed to colorless (a). Another gene has a recessive allele (w) that results in waxy starch, as opposed to normal starch (W). The two genes segregate independently. An AaWW plant is testcrossed. What are the phenotypes and relative frequencies of offspring?
13
🧬 BiologyTrace Evidence
Which of the following is an example of trace evidence?
14
🧬 BiologyGenetics
A diploid organism in which both the alleles are the same at a given locus, is said to be
15
🧬 BiologyCell Biology
What region of a chromosome do mitotic and meiotic spindle fibers attach to?
16
🧬 BiologyCell Biology
At what phase during the mitotic cell division, does the kinetochore microtubule begin to form?
17
🧬 BiologyGenetics
A chromosomal aberration with a trisomy of chromosome 21 is known as
18
🧬 BiologyCell Biology
What is programmed cell death called as?
19
🧬 BiologyMolecular Biology
During DNA replication, the two parental strands separate and each one acts as a template strand for new complementary strands. What is this model of DNA replication called?
20
🧬 BiologyCell Biology
What process do prokaryotic cells divide by?
21
⚗️ ChemistryBiochemistry
What are fatty acids containing more than one double bonds between the carbon atoms called?
22
⚗️ ChemistryBiochemistry
Which of the following is an example of a disaccharide sugar?
23
🧬 BiologyAnatomy
What part of the CNS is associated with vital reflexes such as heartbeat and respiration?
24
🔬 Forensic ScienceForensic Law
What is "Lying under oath" called?
25
🧬 BiologyCell Biology
Which of the following statements are TRUE?
i. The membrane of the endoplasmic reticulum is continuous with the outer nuclear membrane
ii. The Golgi apparatus is a distinctive stack of flattened sacks called cristae
iii. Peroxisomes contain enzymes that digest cellular components.
iv. Mitochondria produce ATP molecules
26
🧬 BiologyBiometrics
Which of the following is an example of behavioural biometrics?
27
🔬 Forensic ScienceForensic Law
Which of the following standard is related to the admissibility of evidence?
28
⚛️ PhysicsMicroscopy
After reaching the resolution limit of a microscope, it can be continued to magnify an image but not improve its resolution-this is called as:
29
🧬 BiologyEvidence Classification
Consider the following statements:
i. Brand of footwear is a class characteristic
ii. DNA profile is an individual characteristic
iii. Wear and tear on the sole of the footwear is a class characteristic
iv. Blood group is an individual characteristic
Which of the above statements is true/correct?
30
🔬 Forensic ScienceEvidence Collection
What is an exemplar?
31
🔬 Forensic ScienceCrime Scene Management
Which of the following search methods on the crime scene is a very thorough method for searching for evidence?
32
🔬 Forensic ScienceCrime Scene Sketching
Triangulation is a method used for which of the following purposes?
33
🔬 Forensic ScienceHistory of Forensics
Consider the following pairs:
i. Father of forensic toxicology - Albert Osborn
ii. Father of Forensic Ballistics - Calvin Goddard
iii. Father of fingerprints - Francis Galton
iv. Father of questioned documents - Mathieu Orfila
Which of the scientists are correctly matched with their domain?
34
⚖️ LawEvidence Characteristics
Consider the following pairs:
i. Fingerprint - Striations
ii. Toolmarks - Hiatus
iii. Handwriting - Minutiae
iv. Glass - Fractures
Which of the evidences are correctly matched with their features?
35
🔬 Forensic ScienceCrime Scene Management
Consider the following duties of the first responding officer.
i. Barricade the crime scene
ii. Compile data from the scene
iii. Attend to any injured people/survivors
iv. Remove and detain witnesses/suspects from crime scene
Arrange the duties in chronological order starting from the first duty
36
🧬 BiologyEvidence Packaging
What is a druggist fold?
37
🔬 Forensic ScienceCrime Scene Investigation
The trace evidence sometimes fluoresces under Alternate Light Source (ALS) used at the crime scene. What is its range?
38
🏗️ Civil EngineeringCrime Scene Reconstruction
In crime scene reconstruction, what does "conjecture" mean?
39
🧬 BiologyEvidence Packaging
Consider the following statements about the packaging of evidence:
i. Biological samples such as bloody cloth have to be packaged in an airtight container while it's wet
ii. Samples suspected of containing accelerants from arson scenes should be packaged in airtight metal cans
iii. All the evidence collected from the crime scene should be packaged in one common container for ease of transportation
iv. Biological samples should be air-dried at room temperature and before packaging in breathable paper bags
Which of the above statements are true/correct?
40
⚗️ ChemistryArson Investigation
A V-shaped burning pattern on a wall on a fire crime scene may indicate which of the following?
41
🧬 BiologyCriminology
A serial offender is suspected of victimizing young teenage girls by mutilating their breasts. What will be the signature/style by which the culprit is killing his victims be called?
42
🧬 BiologyDNA Profiling
Which of the following evidences have the power of individualization?
43
🔬 Forensic ScienceForensic Ethics
Which of the following is the ethical responsibility of a forensic scientist?
44
🔬 Forensic ScienceHistory of Forensics
Where was the first chemical examiner laboratory set up in India?
45
🔬 Forensic ScienceCrime Scene Protection
Consider the following statements to follow to avoid contamination of the crime scene.
i. Establish multiple routes of entry and exit to the crime scene
ii. Wear PPE at all times while on the crime scene
iii. Create a separate route for entry to the crime scene for onlookers
iv. Use a single-use collection kit for biological samples
Which of the above statements is true/correct?
46
🧬 BiologyEvidence Vocabulary
Consider the following pairs:
| Term | Definition |
| --- | --- |
| i. Elimination sample | Known source from someone who had lawful access to the scene |
| ii. Questioned sample | Known source from the crime scene which was presumably uncontaminated during a crime |
| iii. Reference sample | Known source with which evidence is compared to establish a link |
| iv. Control sample | Recovered from crime whose source is in question |
Which of the above pairs are correctly matched?
47
🔬 Forensic SciencePresumptive Testing
What is a presumptive test?
48
⚗️ ChemistryArson and Explosives
Consider the following guidelines for the collection of evidence on an explosive scene
i. Collect samples in airtight glass jars without rubber liners
ii. Fill the container with evidence suspected to have accelerant full up to the brim with no space.
iii. Use breathable paper bags to collect debris with suspected explosive residue
iv. Use an activated charcoal strip placed inside the container to absorb volatile fumes from the sample
Which of the above statements is true/correct?
49
🧬 BiologyForensic Serology
On a suspected homicide crime scene, which of the following chemicals is used for the chemiluminescence of blood?
50
🔬 Forensic ScienceCrime Scene Sketching
Which of the following sketches shows a side view for example perspective of a wall looking from the side?
51
🔬 Forensic ScienceCrime Scene Photography
Which of the following is a detailed millimetre scale placed next to evidence while taking close view photograph of evidence?
52
🧬 BiologyImpression Evidence
Electrostatic lifting device can be used to collect which of the following evidence from crime scene?
53
🔬 Forensic ScienceForensic Quality
Which of the following body offers accreditation to forensic science laboratories?
54
🔬 Forensic ScienceForensic Law
Inquiry into the cause of death by Magistrate is covered in which of the following?
55
🔬 Forensic ScienceHistory of Forensics
The first Central Forensic Science Laboratory was started in Calcutta in which of the following year?
56
🔬 Forensic ScienceForensic Ethics
Consider the following ethics of a forensic expert:
i. Be subjective in validated scientific analysis
ii. Be objective in their analysis
iii. Employ validated methods of analysis
iv. Give personal opinions on the suspect of the crime
Which of the above statements are true/correct?
57
🔬 Forensic ScienceForensic Law
Which of the following Acts relates to evidence and its admissibility in the court in India?
58
🧬 BiologyLocard Principle
When trace evidence is transferred from source "A" to source "C" without contact via intermediate source "B" it is called?
59
🔬 Forensic ScienceForensic Medicine
Consider the following statements regarding who can conduct an autopsy in India.
i. A trained Magistrate
ii. A Registered Medical Practitioner in forensic medicine
iii. Coroner
iv. A doctor with B.A.M.S degree
Which of the above statements are true/correct?
60
🔬 Forensic ScienceForensic Law
Which of the following evidences are NOT accepted in the Indian Legal system or admissible in court?
61
⚛️ PhysicsMicroscopy
Michel Levy chart is referred in which of the following microscopy while examining birefringent evidence?
62
⚛️ PhysicsMicroscopy
The Stereo microscope has a different optical path for each eye to view which gives rise to?
63
⚛️ PhysicsMicroscopy
What is the lens in a compound microscope closest to the specimen called?
64
⚛️ PhysicsMicroscopy
The UV or blue light is used to focus on evidence sample in which of the following microscopes?
65
⚛️ PhysicsMicroscopy
Which are the two types of electron microscopes used in forensic science laboratories?
66
🔬 Forensic ScienceForensic Physics
Examination of tire marks is carried out in which of the following divisions of forensic science laboratory?
67
🔢 MathStatistics
Consider the following pairs:
i. Mean - Most occurring value in a sample
ii. Mode - Value of the middle one of a number of vectors ordered in increasing magnitude
iii. Median - An arithmetic average of all values
iv. Standard deviation - Measure of dispersion around mean
Which of the above pairs are correctly matched?
68
🔢 MathProbability
The second law of probability, the addition rule is used for which of the following events?
69
🔢 MathHypothesis Testing
In hypothesis testing, what is a type I error?
70
🔢 MathStatistical Tests
What does the F--test measure?
71
🔢 MathSampling Methods
What is systemic sampling?
72
🔢 MathStatistical Tests
How are degrees of freedom calculated in Chi square test? (where r is number of rows and c is number of columns)
73
⚗️ ChemistryBiochemistry
Fetal hemoglobin is made up of four protein chains. They are
74
⚗️ ChemistryBiochemistry
What type of amylase does the human saliva constitute?
75
🧬 BiologyForensic Biology
Match the columns:
| Column 1 | Column 2 |
| --- | --- |
| i. Blood | a) Phadebas test |
| ii. Semen | b) Christmas tree staining |
| iii. Saliva | c) Nessler's test |
| iv. Urine | d) Takayama crystal assay |
Choose the correct option:
76
🧬 BiologyDNA Profiling
In STR genotyping results for multiple contributors, four peaks were obtained on a single locus for a sample. What is your most probable conclusion?
77
🧬 BiologyBiometrics
Automated Multi-modal Biometric Identification System (AMBIS) has which of the following biometrics?
78
🧬 BiologyMolecular Biology
After 6 cycles of PCR amplification process, how many number of DNA copies would be generated under ideal conditions?
79
🧬 BiologyMolecular Biology
In agarose gel electrophoresis, what dye is used to visualise DNA?
80
⚗️ ChemistryDNA Extraction
Arrange the steps of organic DNA extraction method in order
i. Ethanol precipitation
ii. Cellular lysis
iii. PCI treatment
iv. Gel electrophoresis
81
🧬 BiologyMitochondrial DNA
In the mitochondrial DNA, uninterrupted C-stretches in the mt DNA are an example of
82
🧬 BiologyDNA Profiling
In 1984, Sir Alec Jeffreys was the first to utilise VNTR loci for DNA fingerprinting. What technique did he use?
83
🧬 BiologyPopulation Genetics
How would you calculate the locus genotype frequency for a heterozygous locus with allele frequencies p and q for human STR genotyping?
84
🧬 BiologyMitochondrial DNA
Which of the following statements related to mitochondrial DNA is INCORRECT?
85
🧬 BiologyGenetics
Which of the following regions of the Y chromosome does not participate in homologous recombination with the X chromosome?
86
🧬 BiologyMolecular Biology
Arrange the temperatures of Polymerase Chain Reaction in order according to the procedural steps of the reaction setup.
i. 72°C
ii. 60°C
iii. 92°C
87
🧬 BiologyAnatomy
Which of the following is an example of a sesamoid bone?
88
🔬 Forensic ScienceForensic Medicine
What does the term "Compos mentis" while giving a testimony or dying declaration mean?
89
🧬 BiologyDNA Profiling
Arrange the steps of VNTR RFLP analysis in their proper sequence
i. Restriction digestion
ii. Probe hybridisation
iii. Gel electrophoresis
iv. Blotting
90
🧬 BiologyMolecular Biology
Match the column with respect to the different forms of DNA helical properties:
| Form | Base pairs per turn | Axial rise (nm) |
| --- | --- | --- |
| i. A-DNA | p. 10 | x. 0.34 |
| ii. B-DNA | q. 11 | y. 0.45 |
| iii. Z-DNA | r. 12 | z. 0.26 |
Choose the correct option:
91
⚗️ ChemistryBiochemistry
Which of the following reagents is used for the biochemical analysis of RNA?
92
🧬 BiologyMolecular Biology
Which among the following radiolabelled probes show the highest sensitivity for DNA detection?
93
🧬 BiologyMolecular Biology
The "REP" in REP-PCR stands for
94
🧬 BiologyMolecular Biology
During probe synthesis which of the following causes hairpin loop formation?
95
🧬 BiologyDNA Profiling
In gender typing using AMEL locus, maleness is indicated by the presence of
96
🧬 BiologyMolecular Biology
In ASO hybridisation for SNP analysis, what is the enzyme HRP conjugated to?
97
🧬 BiologyGenetics
Which of the following forensic genetic markers does NOT show length polymorphism?
98
🧬 BiologyDNA Profiling
Which of the following statements pertaining to STRs is INCORRECT?
99
🔬 Forensic ScienceCrime Scene Management
The following steps are carried out during crime scene processing.
i. Collect
ii. Process and preserve
iii. Record
iv. Observe
Which is the right order beginning from the first step?
100
🧬 BiologyPopulation Genetics
The minimum allele frequency for a sample size of 326 individuals is
101
🧬 BiologyGenetics
What is the most appropriate definition of Satellite DNA?
102
🧬 BiologyForensic Biology
What part of the hair contains nerves and capillaries that supply nutrients?
103
🧬 BiologyForensic Biology
In what way, the presence of plant peroxidases may affect the result of Kastle-Meyer assay?
104
🧬 BiologyMolecular Biology
Regular DNA polymerases exhibit some activity below their optimal temperature, resulting in non-specific amplification. What type of PCR modification technique will help overcome this issue?
105
🧬 BiologyDNA Profiling
Arrange the steps for STR genotyping in order
i. PCR amplification
ii. Comparison with reference samples
iii. Determination of STR profile
iv. DNA quantification
v. DNA extraction
vi. Separation of STR alleles
106
🧬 BiologyDNA Preservation
Which of the following statements related to FTA paper stand true?
i. It is an absorbent cellulose-based paper
ii. It protects DNA from nuclease degradation
iii. It is stable at room temperature for several years
iv. It prevents bacterial growth
107
🧬 BiologyDNA Profiling
TPOX locus used in the CODIS-based STR kits is an example of what type of STR marker?
108
⚗️ ChemistryBiochemistry
Rhodamine Red that is commonly used for the fluorescent labelling of DNA probes has an emission maximum at what wavelength?
109
🧬 BiologyMolecular Biology
Who developed the technique of PCR, which is now used extensively for DNA fingerprinting?
110
🔬 Forensic ScienceForensic Law
What does Corpus delecti mean?
111
⚗️ ChemistryBiochemistry
What are the components of an RNA nucleoside molecule?
112
🧬 BiologyGenetics
In what year was the Human Genome Project completed?
113
⚗️ ChemistryBiochemistry
The combining of multiple polypeptide chains in a large functional protein is called its
114
🧬 BiologyGenetics
What is the dihybrid ratio according to the second law of Mendel?
115
🧬 BiologyGenetics
What is the study of a family tree by examination of appearing traits called?
116
🧬 BiologyGenetics
In snapdragons, a cross between a red flower plant and a white flower plant produces a heterozygote that has pink flowers. This is an example of
117
🧬 BiologyGenetics
What causes Barr body formation?
118
🧬 BiologyForensic Biology
What fluid accounts for 60% of the seminal fluid?
119
🧬 BiologyForensic Biology
What component of the sweat can be used for performing a confirmatory assay?
120
🧬 BiologyGenetics
The stability of allele and genotype frequencies from one generation to the next is predicted by
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About JKSSB Assistant Scientific Officer (DNA) 2024 Previous Year Paper
This page contains all 120 questions from the JKSSB Assistant Scientific Officer (DNA) examination conducted in 2024 by the 🔬 Home Department (Forensic Science Laboratory). Every question is solved with a detailed explanation to help you understand the concept.
Subjects covered: 🔬 Forensic Science, Biology, Chemistry, Physics, Law, 🏗 Civil Engineering, 🔢 Math. Practice these previous year questions to boost your preparation for upcoming JKSSB exams in Jammu & Kashmir.