Deck 7: Blood, Forensic Biology, and DNA

Question 1

With regard to crime scene investigations, the term PPE stands for:

A) Personal Police Emergency
B) Prosecution and Police Evidence
C) Personal Protective Equipment
D) Personal Performance Evaluation

Answer 1

C

Question 2

You are about to enter the scene of a bloody double homicide to begin your investigation and collect evidence. Please choose the most appropriate personal protective equipment (PPE) you would want to wear while working in the scene:

A) Your agency uniform
B) Tyvek suit, gloves, goggles, shoe covers, and mask
C) SCBA tank, self-contained chemical suit
D) You don't go, you send in a remote operated vehicle

Answer 2

B

Question 3

When collecting clothing from the same person you can bag these items together if it is properly labeled.

Answer 3

False

Question 4

There are three general categories of bloodstains: Passive, __________, and Altered.

A) Cast-off
B) Volume
C) Voids
D) Spatter

Question 5

Certain materials should not be packaged in airtight containers because there is the threat of mold growing. Which of the following evidence is most susceptible to mold growth if packaged in airtight containers?

A) Latent print lift card
B) Suicide note
C) Bloody shirt
D) Cell phone

Question 6

Dried blood can be swabbed with a cotton sterile swab by using:

A) An organic solvent
B) Two drops of sterile water
C) Run through tap water
D) Any water source

Question 7

Which of the following is a presumptive chemical use for screening blood at a crime scene?

A) PCR
B) SPR
C) Acid Phosphatase
D) Leucomalachite green

Question 8

You are at the scene of a violent crime. You are tasked with collecting liquid blood that has pooled on the floor. Which is the most appropriate way to collect the evidence?

A) Cut out the section of floor and collect the sample in place.
B) Place a sterile swab in the blood, allow the sample to dry, cap it, and package in a swab box and envelope.
C) Allow the blood to dry in place and scrape flakes into a clean paint can.
D) Draw a sample into a pipette and package in a paper bag.

Question 9

You are tasked with collecting evidence related to a homicide. You observe that the suspect does not have any blood staining on their person or clothing. What should you do?

A) Collect the clothing and package separately
B) Do not collect because the lack of blood is positive evidence that the person was not at the location of the blood shedding event
C) Collect the clothing only if told to by a supervisor
D) Do not collect the clothing because it is the job of the arresting officer

Question 10

Two important requirements of photographic documentation of bloodstain evidence are to photograph bloodstain patterns at a ______________ angle; and with/without ____________ present.

A) 45 degree, lighting
B) 90 degree, a ruler/scale
C) 15 degree, a flashlight
D) 35 degree, evidence

Question 11

Which of the following is the correct pairing of bases within the double helix?

A) A-T, G-C
B) A-C, G-T
C) A-A, G-T
D) C-A, T-G

Question 12

You have been assigned a case where human skeletal remains have been found at a city dump. Which of the following DNA techniques would you use to identify the victim?

A) RFLP
B) PCR
C) STR
D) mtDNA

Question 13

Which of the following is the forensic database for DNA?

A) NIBIN
B) AFIS
C) CODIS
D) STR

Question 14

This group comprises forensic DNA analysts from local, state, and federal laboratories throughout the U.S. who have developed guidelines for quality assurance and quality control:

A) SWGSTAIN
B) SWGANTH
C) SWGDAM
D) SWGFAST

Question 15

Items of evidence that contain blood should be packaged by wrapping in paper and then placed in a paper bag or an envelope.

Question 16

___________ is defined as the act of making impure or unsuitable by contact or mixture with something unclean or foreign.

A) Contamination
B) "Fruit of the poisonous tree"
C) Chemically processed
D) Comparative analysis

Question 17

Who is responsible for establishing the agency guidelines for the best practice of handling biological materials, posting the guidelines, and providing "right to know" training to handle those materials?

A) Agency supervisors and administration
B) Co-workers
C) Technicians
D) Local government

Question 18

________ behaves in well-understood mechanisms, the shape, grouping, and distribution of them can assist the investigator in reconstructing what took place at the scene of a violent crime.

A) Animals
B) Smoke
C) Fire
D) Blood

Question 19

The goal of a reconstruction of a crime scene using Bloodstain Pattern Analysis is to assist the forensic investigation with which of the following questions:

A) What event occurred
B) When and where the event occurred
C) Who was there during the event
D) All of the above

Question 20

The Bloodstain Pattern Analyst must adhere to _____________ methodology and rely on biology, physics, and math to perform the tasks during the analysis.

A) Legal
B) Scientific
C) Behavioral
D) Educational

Question 21

Are tasked with processing a crime scene which has a significant amount of blood. What bloodborne disease should you be cautious of when determining which PPE to wear?

A) Hepatitis C
B) Hepatitis B
C) HIV
D) All of the above