- Description
CJS 215 Wk 4 Concept Check
- Which is not a factor in determining the rate at which alcohol is absorbed into the bloodstream?
The alcoholic content of the beverage
The presence or absence of food in the stomach
The amount consumed
All of the above are factors
- Question 2
If blood is not available, which of the following can’t the medical examiner use to determine the body’s alcohol content to a reasonable degree of accuracy?
Urine
Cerebrospinal fluid
Vitreous humor
Brain tissue
- Question 3
To analyze blood for alcohol, forensic labs normally use what?
TLC
GM/MS
LC
GC
- Question 4
The presence of high levels of carbon monoxide in the blood of a victim found at the scene of a suspicious fire is proof of what about the victim?
The victim died elsewhere and was brought to the fire scene after death.
The victim perished after the fire started.
The victim died before the fire started.
The victim was the arsonist.
- Question 5
The DRE program incorporates standardized methods for examining suspects to determine what?
Whether they are transporting any illegal substances
Whether they are involved in the buying or selling of drugs
Whether they are under the influence of one or more drugs
Whether they have ever taken one or more drugs
- Question 6
Which part of the hair shaft is most resistant to chemical decomposition?
Cortex
Medulla
Follicle
Cuticle
- Question 7
In determining whether a hair sample originated from a male or a female, what is the most important consideration?
Whether the hair is bleached
The results of DNA analysis performed on the root structure
Whether the hair was dyed
The length of the hair
- Question 8
The conviction of Ennis Cosby’s killer was aided by the DNA analysis performed on a hair that was crucial evidence in the case. Which of the following is true about this hair?
It belonged to Cosby and was found in the suspect’s car.
It belonged to the killer and was found in his cap, which he had wrapped the murder weapon in before discarding it.
It belonged to Cosby and was found clinging to the murderer’s jacket.
It belonged to the killer and was found on the body of the victim.
- Question 9
What fiber’s microscopic appearance includes a ribbon-like shape (i.e., flat) with twists at irregular intervals?
Polyester
Cotton
Kapok
Linen
- Question 10
In the collection of fiber evidence, great care should be taken to do what?
Avoid cross-contamination of evidence
Shake off all garments to be sent for examination before neatly folding them
Send as much potential evidence as possible to the crime lab to ensure that nothing is missed
Package all items from each individual together in one bag to avoid later confusion
- Question 11
Which blood components are directly pertinent to the forensic aspects of blood identification?
Platelets
Blood serum
Red blood cells
Both B and C
- Question 12
To determine whether a bloodstain is of human or animal origin, what will the serologist perform?
A precipitin test
The luminol test
An analysis with Hemastix strips
RIA
- Question 13
The technology of DNA typing had its beginnings in 1985 with the work of whom?
Henry Lee
Francis Crick
James Watson
Alec Jeffreys
- Question 14
Which of the following depicts correct base-pairing in DNA?
A-U
G-A
T-A
C-T
- Question 15
What does the PCR technique do?
Provides a statistical analysis of the nitrogenous-base pairings
Can produce many exact copies of segments of DNA
Produces information regarding the sequence of nitrogenous bases
Virtually eliminates operator error from DNA analysis