Biology · Law Legal Studies

Forensic Science Techniques

725 Questions

Forensic science techniques involve the application of scientific methods like DNA fingerprinting, biometrics, and trace evidence analysis to solve crimes. These topics appear in specialized law enforcement and general science exams. Practice these questions to understand forensic fundamentals.

DNA fingerprinting methodsTrace evidence transferBiometrics and identificationForensic pathology

Forensic Science Techniques Questions

Multiple choice botany biotechnology: principles and processes downstream processing biotechnology biotechnology and its application

Which of the following recent techniques is used for separating fragments of DNA?

  1. Eastern blotting

  2. Northern blotting

  3. Southern blotting

  4. Western blotting
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Southern blotting involves DNA digestion, Gel electrophoresis, Blotting, Probe labeling, Hybridization and washing, and detection.

So, the correct option is 'Southern blotting'.

Multiple choice zoology biotechnology: general introduction application of biotechnology miscellaneous applications of biotechnology application of biology in therapy and vaccine

Which of the following are squares of glass, smallest than the smallest postage stamp

  1. Biochip

  2. Proteomics

  3. Forensic technologies

  4. None
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Biochips are squares of glass, smaller than smallest postage stamp, covered with millions of DNA strand. Biochip is a tool allowing rapid screening of gene profile to detect genes. They are called gene microarrays. A biochip contains all known human genes.

Multiple choice zoology biotechnology: general introduction application of biotechnology miscellaneous applications of biotechnology application of biology in therapy and vaccine

Which of the following biosensors is used for medical diagnostics and forensic science?

  1. Ozone biosensor

  2. DNA biosensor

  3. Microbial biosensor

  4. Both B and C
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

DNA biosensors have various applications, commonly used for medical diagnostics, forensic science, agriculture, or even environmental clean-up efforts. It function as the two strands of DNA stick to each other by virtue of chemical attractive forces and that is, two strands that match up at every nucleotide position gives rise to a fluorescent signal that is then transmitted to a signal generator.

So, the correct answer is option B.

Multiple choice botany why classification? modern classification system traditional method of animal classification salient features of five kingdoms classification hierarchy hierarchy of classification

For identifying organisms through key usually.

  1. Two contrasting characters are used

  2. One similar character is studied

  3. Two are more similar characters are used

  4. Only one statement called lead is used
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A taxonomic key works by presenting a series of choices between two contrasting characters (couplets) to identify an organism.

Multiple choice zoology applications of biotechnology cloning process of cloning gene cloning

Technique used to detect the DNA in a clone is?

  1. Polymerase chain reaction

  2. Gel electrophoresis

  3. Chromatography

  4. Autoradiography
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

PCR (Polymerase Chain Reaction) is a technique used to amplify specific DNA sequences, making it possible to detect and analyze DNA in a clone or sample.

Multiple choice zoology molecular basis of inheritance the search for genetic material dna structure and replication molecular genetics

Beside direct chemical analysis DNA and RNA can be detected by which of the following method?
a. Photometric procedures
b. Staining reactions
c. Enzyme digestion
Select the correct answer using the codes given.

  1. $1, 2$ and $3$
  2. $1$ and $2$
  3. $2$ and $3$
  4. $1$ and $3$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

DNA and RNA can be detected using photometric procedures (like UV absorbance), staining reactions (like Feulgen stain for DNA), and enzyme digestion (using DNase or RNase to confirm identity).

Multiple choice bio-chemistry biochemical techniques manipulation of dna electrophoresis isolation and separation of dna

DNA probe is used in:

  1. Gel electrophoresis

  2. Northern blotting

  3. DNA finger printing

  4. Interferon synthesis
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

DNA probes are essential in DNA fingerprinting to identify specific variable number tandem repeats (VNTRs) or other markers after they have been separated by electrophoresis and transferred to a membrane.