Criminalistics answers

Final:


Question 1 of 35 0.5/ 0.5 Points

The judicial case that set forth the guidelines for determining the admissibility of scientific examinations in the Federal courts is:  
 A. a. Frye v. United States  
  
 B. b. Daubert v. Merrell Dow Pharmaceuticals  
  
 C. c. Coppolino v. State of Florida  
  
 D. d. Mapp v. United States  
  
 E. e. People v. Williams  



Answer Key: B
Question 2 of 35 0.0/ 3.0 Points

Describe the method for documenting and collecting a toolmark impression. What instrument is used to compare a toolmark impression to a known tool?
CLosely observe scrapes and scratches regardless of size, compare matches between control and suspect surfaces. Submit actual item, photographs or casts to a crime lab for further evaluation. Photomicrograph is effective for comparison evaluation of tool marks.



 
Question 3 of 35 0.5/ 0.5 Points

The process by which the body temperature cools after death is known as:  
 A. a. Rigor mortis  
  
 B. b. Algor mortis  
  
 C. c. Livor mortis  
  
 D. d. Denaturation  
  
 E. e. Ambient degradation  



Answer Key: B
Question 4 of 35 0.5/ 0.5 Points

Which of the following techniques can be used to estimate the time of death?  
 A. a. Rigor mortis  
  
 B. b. Eye fluid potassium levels  
  
 C. c. Livor mortis  
  
 D. d. Insect infestation  
  
 E. e. All of the above  



Answer Key: E
Question 5 of 35 0.0/ 3.0 Points

Why is it almost impossible to obscure one's fingerprints by surgery or mutilation?
Because they always grow back the same.

 
Question 6 of 35 0.0/ 3.0 Points

Distinguish between a preliminary test for blood and a precipitin test for blood. Which test is typically used at a crime scene?
Several tests are available to determine blood at a crime scene...Kastle-Meyer test (not specific to blood),luminol/bluestar tests (light producing), microcrystalline tests (chemical-crystal tests) and antiquated color test determine the likely presence of blood, some more accurate than others. Precipitin test differentiate between human and animal (non-human) blood.

 
Question 7 of 35 0.5/ 0.5 Points

A comparison analysis subjects a suspect specimen and a control specimen to the same tests and examinations for the ultimate purpose of determining:  
 A. a. Whether or not they have a common origin  
  
 B. b. If they are identical in chemical composition  
  
 C. c. If the same person handled them  
  
 D. d. If they are alike in molecular structure  
  
 E. e. All of the above  



Answer Key: A
Question 8 of 35 0.5/ 0.5 Points

The "jigsaw fit" of known and questioned fragments is important for court presentation primarily because:  
 A. a. It is a quick way of demonstrating how the object broke.  
  
 B. b. Courts and juries are too nonscientific to understand it any other way.  
  
 C. c. Instrumental analysis is too complicated to explain to nontechnical juries.  
  
 D. d. This method will definitely demonstrate common origin when a match is made.  
  
 E. e. Instrumental analysis of the fragments will not be sufficiently specific for comparison purposes.  



Answer Key: D
Question 9 of 35 0.5/ 0.5 Points

The two most important physical properties of glass for forensic comparisons are:  
 A. a. color and density  
  
 B. b. weight and density  
  
 C. c. refractive index and density  
  
 D. d. refractive index and weight  
  
 E. e. refractive index and color  



Answer Key: C
Question 10 of 35 0.5/ 0.5 Points

The fracture pattern of glass usually has:  
 A. a. Radial lines  
  
 B. b. Concentric lines  
  
 C. c. Radial and concentric lines  
  
 D. d. Directional lines  
  
 E. e. None of the above  



Answer Key: C
Question 11 of 35 0.5/ 0.5 Points

Which of the following is an element?  
 A. a. Wood  
  
 B. b. Water  
  
 C. c. Aluminum  
  
 D. d. Air  
  
 E. e. Fire  



Answer Key: C
Question 12 of 35 0.5/ 0.5 Points

A technique for separating and tentatively identifying the components of a mixture is:  
 A. a. Spectrophotometry  
  
 B. b. Infrared  
  
 C. c. Chromatography  
  
 D. d. Mass spectrometry  
  
 E. e. Ultraviolet  



Answer Key: C
Question 13 of 35 0.5/ 0.5 Points

Which of the following is not part of the gas chromatograph?  
 A. a. Injection port  
  
 B. b. Column  
  
 C. c. Slit  
  
 D. d. Flame detector  
  
 E. e. Recorder  



Answer Key: C
Question 14 of 35 0.5/ 0.5 Points

A single specific test for identification is:  
 A. a. Infrared spectrophotometry  
  
 B. b. Ultraviolet spectrophotometry  
  
 C. c. Gas chromatography  
  
 D. d. Thin-layer chromatography  
  
 E. e. Density-gradient tubes  



Answer Key: A
Question 15 of 35 0.5/ 0.5 Points

Which of the following has higher frequencies and higher energy values in the electromagnetic spectrum?  
 A. a. Visible light  
  
 B. b. Radio waves  
  
 C. c. Ultraviolet radiation  
  
 D. d. Infrared radiation  
  
 E. e. x-rays  



Answer Key: E
Question 16 of 35 0.5/ 0.5 Points

The portion of the hair containing its scales is:  
 A. a. The cortex  
  
 B. b. The cuticle  
  
 C. c. The medulla  
  
 D. d. The root  
  
 E. e. The follicle  



Answer Key: B
Question 17 of 35 0.5/ 0.5 Points

Marijuana is considered to be a:  
 A. a. Depressant  
  
 B. b. Stimulant  
  
 C. c. Narcotic  
  
 D. d. Hallucinogen  
  
 E. e. Tranquilizer  



Answer Key: D
Question 18 of 35 0.5/ 0.5 Points

A police officer performs a field test on a white powder, obtaining a purple color. The most likely drug present is:  
 A. a. Cocaine  
  
 B. b. Heroin  
  
 C. c. LSD  
  
 D. d. Methadone  
  
 E. e. A barbiturate  



Answer Key: B
Question 19 of 35 0.5/ 0.5 Points

Regular use of the following drug may lead to physical dependency:  
 A. a. LSD  
  
 B. b. Marijuana  
  
 C. c. Aspirin  
  
 D. d. Caffeine  
  
 E. e. Ethyl alcohol  



Answer Key: E
Question 20 of 35 0.5/ 0.5 Points

Which of the following is not a depressant?  
 A. a. Librium  
  
 B. b. Valium  
  
 C. c. Methaqualone  
  
 D. d. Ethyl alcohol  
  
 E. e. All of the above are depressants.  



Answer Key: E
Question 21 of 35 0.5/ 0.5 Points

Alcohol is eliminated from the body chemically unchanged in:  
 A. a. Urine  
  
 B. b. Breath  
  
 C. c. Perspiration  
  
 D. d. All of the above  
  
 E. e. None of the above  



Answer Key: D
Question 22 of 35 0.5/ 0.5 Points

The analytical technique widely used for directly measuring the amount of alcohol present in the blood is:  
 A. a. Gas chromatography  
  
 B. b. Thin-layer chromatography  
  
 C. c. Infrared spectrophotometry  
  
 D. d. Atomic absorption  
  
 E. e. Neutron activation analysis  



Answer Key: A
Question 23 of 35 0.5/ 0.5 Points

The following drug is not found in blood or urine:  
 A. a. Morphine  
  
 B. b. Heroin  
  
 C. c. Amphetamine  
  
 D. d. Methadone  
  
 E. e. Amobarbital  



Answer Key: B
Question 24 of 35 0.5/ 0.5 Points

A neutral substance will have a pH closest to:  
 A. a. 0  
  
 B. b. 2  
  
 C. c. 5  
  
 D. d. 7  
  
 E. e. 9  



Answer Key: D
Question 25 of 35 0.0/ 0.5 Points

The Breathalyzer measures the quantity of light absorbed by:  
 A. a. Sulfuric acid  
  
 B. b. Silver nitrate  
  
 C. c. Acetone  
  
 D. d. Potassium dichromate  
  
 E. e. Ethyl alcohol  



Answer Key: D
Question 26 of 35 0.5/ 0.5 Points

What approximate percentage of the population is type B?  
 A. a. 80%  
  
 B. b. 4l%  
  
 C. c. 38%  
  
 D. d. 15%  
  
 E. e. 6%  



Answer Key: D
Question 27 of 35 0.5/ 0.5 Points

One parent is type AB; the other parent is type O. A possible genotype for an offspring is:  
 A. a. AB  
  
 B. b. OO  
  
 C. c. AO  
  
 D. d. All of the above  
  
 E. e. None of the above  



Answer Key: C
Question 28 of 35 0.5/ 0.5 Points

Acid-phosphatase is a major constituent of:  
 A. a. Blood  
  
 B. b. Semen  
  
 C. c. Saliva  
  
 D. d. Perspiration  
  
 E. e. All of the above  



Answer Key: B
Question 29 of 35 0.5/ 0.5 Points

Which of the following statements about mitochondrial DNA is incorrect?  
 A. a. Mitochondrial DNA is located outside the cell's nucleus  
  
 B. b. Mitochondrial DNA is constructed in a loop configuration  
  
 C. c. Two regions of mitochondrial DNA have been found to be highly variable in the human population  
  
 D. d. Many copies of mitochondrial DNA's hypervariable regions are made by PCR  
  
 E. e. The number of repeat segments found in the hypervariable regions are used to type mitochondrial DNA  



Answer Key: E
Question 30 of 35 0.5/ 0.5 Points

Which of the following is not expected to show any evidential marks or impressions?  
 A. a. A fired bullet  
  
 B. b. A cartridge casing fired from a handgun  
  
 C. c. A cartridge casing fired from a shotgun  
  
 D. d. A shotgun pellet  
  
 E. e. All of the above will show markings.  



Answer Key: D
Question 31 of 35 0.5/ 0.5 Points

Two elements detected on the hands of an individual who has recently fired a weapon are:  
 A. a. Zinc and copper  
  
 B. b. Barium and antimony  
  
 C. c. Barium and nitrates  
  
 D. d. Antimony and iron  
  
 E. e. Iron and lead  



Answer Key: B
Question 32 of 35 0.5/ 0.5 Points

Inks on handwritten documents may be compared for their chemical composition by the technique of:  
 A. a. Thin-layer chromatography  
  
 B. b. Infrared spectrophotometry  
  
 C. c. Ultraviolet spectrophotometry  
  
 D. d. Gas chromatography  
  
 E. e. None of the above  



Answer Key: A
Question 33 of 35 0.5/ 0.5 Points

The area of the Internet where all the documents of information are collected.  
 A. a. Uniform resource locator  
  
 B. b. Domain  
  
 C. c. Mailing list  
  
 D. d. Worldwide web  
  
 E. e. Hypertext  



Answer Key: D
Question 34 of 35 0.5/ 0.5 Points

A service offered through the Internet that will send messages concerning a specific topic directly to your e-mail account is:  
 A. a. File transfer protocol  
  
 B. b. Mailing list  
  
 C. c. Newsgroups  
  
 D. d. Worldwide web  
  
 E. e. None of the above  



Answer Key: B
Question 35 of 35 0.5/ 0.5 Points

A __________ will provide the user with the capabilities for accessing web pages on the worldwide web.  
 A. a. Browser  
  
 B. b. Hypertext Transfer Protocol  
  
 C. c. Uniform Resource Locator  
  
 D. d. Modem  
  
 E. e. None of the above  



Answer Key: A