🧪 Assistant Scientific Officer (DNA)2024

🏛️ JKSSB🔬 Home Department (Forensic Science Laboratory)

120Questions
7Subjects
100%Solved
🔬 Forensic Science🧬 Biology⚗️ Chemistry⚛️ Physics⚖️ Law🏗️ Civil Engineering🔢 Math

📝 All 120 QuestionsFree • No Login Required

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

📱 Practice on the Go

Get the JKPrep app for timed mock tests, progress tracking, and daily practice reminders.

Download JKPrep App — It's Free

📄 More JKSSB Papers

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.