Ch 1 Part 1: CSI of Biological Evidence MCQs From Richard Li Book

This section contains MCQs from Chapter 1 Part 1: Crime Scene Investigation of Biological Evidence Book By Richard Li.

Note: Check more MCQs chapter-wise from the Forensic Biology book by Richard Li.

1. What does ‘corpus delicti’ refer to in a forensic investigation?

1. The site of the crime
2. The body of evidence proving a crime
3. The tools used by the criminal
4. The strategy used by the criminal

2. What is the principle that theorizes the cross-transfer of evidence when a perpetrator has physical contact with an object or another person?

1. Newton’s law of transfer
2. The theory of relativity
3. Locard exchange principle
4. Darwin’s theory of evolution

3. Assertion (A): A criminal’s unique Modus Operandi (MO) can establish a case-to-case linkage for serial offender cases.
Reason (R): Modus Operandi refers to the pattern and manner in which a crime is committed.

1. Both (A) and (R) are correct
2. (A) is correct, but (R) is wrong
3. (A) is wrong, but (R) is correct
4. Both (A) and (R) are wrong

4. Why should precautions be taken when using field tests and enhancement reagents in crime scene investigations?

1. They may react with non-biological substances
2. They can contaminate the crime scene
3. They are hazardous to health
4. All of the above

5. The main advantage of using Rapid DNA technology in a crime scene investigation is:

1. It allows for on-site DNA profiling
2. It can recreate DNA sequences that easily saved the STR for further hybridization
3. It enables investigators to save important DNA evidence at the crime scene
4. It helps to secure the DNA from degradation.

6. Which of the following statements are true?

(a) Enhancement reagents such as luminol and fluorescein can detect faint blood-containing evidence.
(b) Field tests and enhancement reagents can only react with blood.
(c) Rapid DNA technology can produce a DNA profile on-site within 2 hours.
(d) Rapid DNA technology can only be used for suspect identification.

Choose the correct option from the list:

1. (a) and (c)
2. (a) and (d)
3. (a), (b), and (c)
4. (a), (c), and (d)

7. Why is it necessary to include a measuring device in crime scene photographs?

1. To ascertain the exact location of the crime
2. To document the sizes of items
3. To determine the time of the crime
4. Both (1) and (2)

8. What information should be included in the notes taken during a crime scene investigation?

1. Only the identities of the investigators
2. Only a description of the scene or items
3. Only the case identifier number
4. All the above

9. It is important to air-dry wet evidence prior to packaging:

1. To prevent the degradation of proteins and nucleic acids
2. To preserve the smell of the evidence
3. To make the evidence easier to handle
4. All of the above

10. Why are control (known or blank) samples collected in forensic investigations?

1. To provide a standard for comparison
2. To prove the innocence of a suspect
3. To assist in the identification of the perpetrator
4. To help identify the cause of the crime

11. When analyzing a bloody fingerprint, which analysis should be performed first?

1. DNA analysis
2. Ridge detail analysis
3. Neither, both can be performed simultaneously
4. It depends on the investigator’s discretion

12. Which of the following statements are true?

(a) Wet evidence should be air-dried prior to packaging to prevent the degradation of proteins and nucleic acids.
(b) All bloodstains, regardless of their size, should be collected at a crime scene.
(c) Destructive analyses should be carried out first when multiple analyses are needed for a single item of evidence.
(d) Control samples are collected to provide a standard for comparison.

Choose the correct option from the list:

1. (a), (b), and (d)
2. (b), (c), and (d)
3. (a), (b), and (c)
4. (b), (c), and (d)

13. What method is used for collecting a blood stain that is difficult to swab or requires multiple exams?

1. Swab
2. Scraping
3. Cutting
4. Collect entire item

14. What is the preferred method of collection for reference liquid blood samples?

1. Swab and air dried
2. FTA paper and air dried
3. Venous blood collection
4. Scraping from the crime site

15. When is the lifting method of collecting a dry blood stain used?

1. On nonabsorbent surfaces
2. On absorbent surfaces
3. For large blood stains
4. For small blood stains

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