Recent questions tagged forensic-science

Description : Forensic significance of Fiber evidence.

Last Answer : Textile fibers can be exchanged between individuals, between individuals and objects and between objects. When fibers are associated with a specific source, such as fabric from the victim, suspect or ... fiber examiners, this most often occurs when pieces of fabric or cordage are physically matched.

Description : What are the different types of timber varieties encountered in forensic cases.

Last Answer : Identification of Timber: Timber has a variety of form which enables it to serve a variety of uses and contributes to its pleasing aesthetic appearance. However, the variability also means that there ... can be distributed evenly or arranged in radial, diagonal lines, or tangential lines.

Description : Define about mitochondrial DNA. What is the forensic significance of mtDNA.

Last Answer : mtDNA (mitochondrial DNA): Human mitochondrial DNA (mtDNA) is a circular double-stranded molecule, 16,569 base pairs (bp) in length that codes for 13 subunits of the oxidative phosphorylation ... result can be obtained by typing mtDNA than by typing polymorphic markers found in nuclear DNA.

Description : What are Diatoms. Explain the identification methods of Diatoms and its specificity. 

Last Answer : Diatoms are a major group of eukaryotic algae, and are one of the most common types of phytoplankton. Most diatoms are unicellular, although some form chains or simple colonies. A characteristic feature of ... less silicized and have less resistance as compare to the fresh water diatoms.

Description : Describe about the DNA markers and their uses in Forensic cases.

Last Answer : DNA (deoxyribonucleic acid) is a molecule that is shaped like a double helix and made up of pairs of nucleotides, abbreviated as A , C , G and T DNA is packaged ... number of repeats. To date, the molecular markers used to determine parentage have primarily utilized microsatellite markers. 

Description : Describe the identification methods of blood? Forensic significance of biological materials.

Last Answer : The Forensics of Blood  After a homicide or an assault has been committed, police investigators usually find blood at the scene of the crime, giving them clues as to what happened. The blood ... then be compared to DNA profiles obtained from reference standards or from other items of evidence. 

Description : Illegal way of trafficking animals A. Kidnapping B. Poaching C. Harboring D. Smuggling

Last Answer : Ans: (b). Poaching 

Description :  In wild life Forensics, identification of animals done by (a). Grouping (b). Feathers (c). Twigs (d). Pug marks

Last Answer : Ans: (d). Pug marks 

Description : A study of relationships between organisms and their environment (a). Ethnology (b). Ecology (c). Monospecific (d). Monoecious

Last Answer : Ans: (b). Ecology  

Description : For examination of diatoms sample should collect from (a). Bone marrow (b). Blood (c). Tissue (d). Epithelial cells 

Last Answer : Ans: (a). Bone marrow

Description : The presumptive test for semen is (a). Acid phosphatase test (b). Sodium alpha naphthyl test (c). Napthanil diazo test (d). Barbiturate test

Last Answer : Ans: (a). Acid phosphatase test 

Description : The fluorescence examination of the seminal stains indicates (a). Pink color (b). White color (c). Blue color (d). Red color

Last Answer : Ans: (b). Blue color 

Description : Which of the following statement is false (a). Enzymes are differentiated by electrophoresis method (b). While DNA sequencing both forward and reverse primers are used (c). Amplification is done through PCR (d). ABO blood grouping is mainly used for differentiating individuals

Last Answer : Ans: (b). While DNA sequencing both forward and reverse primers are used 

Description : Restriction enzymes are used in one of these techniques: (a). Sequencing (b). Genotyping (c). RFLP (d). Polymerization

Last Answer : Ans: (c). RFLP

Description : Electrophoresis is mainly used for: (a) Differentiate the biological sample (b) To perform the human specific presumptive tests (c) DNA isolation from biological material (d) Separates the molecules

Last Answer : Ans: (d). Separate the molecules

Description : While conducting Luminol test, luminol reacts with hydrogen salt and forms: (a) Di-anion (b) Cation (c) Anion (d) All of the above

Last Answer : Ans: (a). Di-anion