Question 1

Electrophoresis is used to

Accepted Answer

A) charge a dead battery. 
B) split water into hydrogen and oxygen gases. 
C) separate DNA fragments. 
D) amplify DNA fragments. 
A) charge a dead battery. 
B) split water into hydrogen and oxygen gases. 
C) separate DNA fragments. 
D) amplify DNA fragments.

Question 2

In order to visualize fingerprints from a non-porous surface,the object may be placed within a fuming chamber and exposed to vapors of which substance?

Accepted Answer

A) Cyanoacetate 
B) Cyanoacrylate 
C) Cyanoacetic acid 
D) Cyanide 
A) Cyanoacetate 
B) Cyanoacrylate 
C) Cyanoacetic acid 
D) Cyanide

Question 3

The filaments of headlights are examined after a head-on accident.Both filaments are observed to have extensive deformation.Which of the following scenario likely applies to the accident?

Accepted Answer

A) Both of the vehicle headlights were on at the time of the crash 
B) Both of the vehicle headlights were off at the time of the crash 
C) There is no way to tell if the vehicle headlights were on or off at the time of the accident 
D) Additional testing on the plastic lenses must be carried out to determine whether the vehicle headlights were on or off at the time of the crash 
A) Both of the vehicle headlights were on at the time of the crash 
B) Both of the vehicle headlights were off at the time of the crash 
C) There is no way to tell if the vehicle headlights were on or off at the time of the accident 
D) Additional testing on the plastic lenses must be carried out to determine whether the vehicle headlights were on or off at the time of the crash

Question 4

A latent fingerprint is made from the depositing of oils and/or sweat.It is invisible to the naked eye.

Accepted Answer

A) True 
 B)False

Question 5

It is impossible to detect,remove,and analyze fingerprints from the surface of a victim's skin.

Accepted Answer

A) True 
 B)False

Question 6

A fire investigation must first focus on finding the fire's origin.

Accepted Answer

A) True 
 B)False

Question 7

What is the flash point of a solvent?

Accepted Answer

A) The minimum temperature at which a vapor will spontaneously ignite 
B) When the temperature exceeds the boiling point of the solvent 
C) The minimum temperature at which a vapor will spontaneously ignite and when the temperature exceeds the boiling point of the solvent 
D) When the vapor pressure of a solvent equals its lower flammability limit (LFL) 
A) The minimum temperature at which a vapor will spontaneously ignite 
B) When the temperature exceeds the boiling point of the solvent 
C) The minimum temperature at which a vapor will spontaneously ignite and when the temperature exceeds the boiling point of the solvent 
D) When the vapor pressure of a solvent equals its lower flammability limit (LFL)

Question 8

In order to avoid prosecution,criminals have used acid or sharp objects in an attempt to obscure their fingerprints.Which of the following describes the outcome of this devious attempt?

Accepted Answer

A) This is effective and would lead to a criminal successfully avoiding prosecution 
B) This is most often not effective since the damage would have to penetrate beyond 1-2 mm beneath the skin's surface 
C) This is effective as long as no visible fingerprint may be seen with the naked eye 
D) This is effective and has necessitated the development of new fingerprinting techniques 
A) This is effective and would lead to a criminal successfully avoiding prosecution 
B) This is most often not effective since the damage would have to penetrate beyond 1-2 mm beneath the skin's surface 
C) This is effective as long as no visible fingerprint may be seen with the naked eye 
D) This is effective and has necessitated the development of new fingerprinting techniques

Question 9

Which of the following molecules would be nonpolar?

Accepted Answer

A) Ethanol 
B) Water 
C) Acetic acid 
D) Gasoline 
A) Ethanol 
B) Water 
C) Acetic acid 
D) Gasoline

Question 10

A victim's body was found at a crime scene with a body temperature of 90oF,at an outside temperature of 65oF.The time of death is likely

Accepted Answer

A) within the past hour. 
B) between 1-2 hrs prior. 
C) between 2-3 hrs prior. 
D) longer than 3 hrs prior. 
A) within the past hour. 
B) between 1-2 hrs prior. 
C) between 2-3 hrs prior. 
D) longer than 3 hrs prior.

Question 11

Blood is taken from a person suspected of driving under the influence of alcohol.If the specimen is kept unrefrigerated at a moderately warm temperature,the blood alcohol concentration will

Accepted Answer

A) remain the same. 
B) increase with time. 
C) decrease with time. 
D) either increase or decrease with time,depending on its starting concentration. 
A) remain the same. 
B) increase with time. 
C) decrease with time. 
D) either increase or decrease with time,depending on its starting concentration.

Question 12

Stainless steel may be classified as a homogeneous solution.

Accepted Answer

A) True 
 B)False

Question 13

The principle of like retains like in gas chromatography refers to the similarity of ___________ between the stationary phase and analyte.

Accepted Answer

A) boiling points 
B) polarities 
C) flash points 
D) molecular weights 
A) boiling points 
B) polarities 
C) flash points 
D) molecular weights

Question 14

A cigarette butt is found at a crime scene that matches the DNA of a suspect.Which of the following is correct?

Accepted Answer

A) The suspect is innocent 
B) The suspect is guilty 
C) The suspect may be guilty;investigators must determine when the cigarette butt was deposited 
D) The suspect may be guilty;DNA evidence is not reliable for forensic investigations 
A) The suspect is innocent 
B) The suspect is guilty 
C) The suspect may be guilty;investigators must determine when the cigarette butt was deposited 
D) The suspect may be guilty;DNA evidence is not reliable for forensic investigations

Question 15

A gas chromatograph provides the identity of an accelerant by matching ____________ between residue found at the crime scene and known accelerants.

Accepted Answer

A) peak shapes 
B) peak heights 
C) peak patterns 
D) All of these choices are correct 
A) peak shapes 
B) peak heights 
C) peak patterns 
D) All of these choices are correct

Question 16

The unit of permil (also known as per mille) is

Accepted Answer

A) ppm. 
B) p.m. 
C) ‰. 
D) %. 
A) ppm. 
B) p.m. 
C) ‰. 
D) %.

Question 17

The polymerase chain reaction involves all of the following except

Accepted Answer

A) replicating DNA outside a cell. 
B) multiplying the number of copies of an individual's entire genome. 
C) multiplying short strands of DNA. 
D) using a DNA thermal cycler. 
A) replicating DNA outside a cell. 
B) multiplying the number of copies of an individual's entire genome. 
C) multiplying short strands of DNA. 
D) using a DNA thermal cycler.

Question 18

Gas chromatography (GC) is used to

Accepted Answer

A) determine the identity of gases dissolved in a liquid. 
B) separate mixtures of gases. 
C) separate mixtures of liquids. 
D) separate mixtures of solids. 
A) determine the identity of gases dissolved in a liquid. 
B) separate mixtures of gases. 
C) separate mixtures of liquids. 
D) separate mixtures of solids.

Question 19

The most common and rapid method to match paint samples is

Accepted Answer

A) gas chromatography. 
B) nuclear magnetic resonance spectroscopy. 
C) mass spectrometry. 
D) infrared spectroscopy. 
A) gas chromatography. 
B) nuclear magnetic resonance spectroscopy. 
C) mass spectrometry. 
D) infrared spectroscopy.

Question 20

What is the most important aspect of paint evidence that is used for comparison purposes?

Accepted Answer

A) The type of pigments in the surface layer 
B) The complexity of the layer structure 
C) The components of the clear coat finish 
D) The texture of the surface layer 
A) The type of pigments in the surface layer 
B) The complexity of the layer structure 
C) The components of the clear coat finish 
D) The texture of the surface layer

Electrophoresis is used to

In order to visualize fingerprints from a non-porous surface,the object may be placed within a fuming chamber and exposed to vapors of which substance?

The filaments of headlights are examined after a head-on accident.Both filaments are observed to have extensive deformation.Which of the following scenario likely applies to the accident?

A latent fingerprint is made from the depositing of oils and/or sweat.It is invisible to the naked eye.

It is impossible to detect,remove,and analyze fingerprints from the surface of a victim's skin.

A fire investigation must first focus on finding the fire's origin.

What is the flash point of a solvent?

In order to avoid prosecution,criminals have used acid or sharp objects in an attempt to obscure their fingerprints.Which of the following describes the outcome of this devious attempt?

Which of the following molecules would be nonpolar?

A victim's body was found at a crime scene with a body temperature of 90^oF,at an outside temperature of 65^oF.The time of death is likely

Blood is taken from a person suspected of driving under the influence of alcohol.If the specimen is kept unrefrigerated at a moderately warm temperature,the blood alcohol concentration will

Stainless steel may be classified as a homogeneous solution.

The principle of like retains like in gas chromatography refers to the similarity of ___________ between the stationary phase and analyte.

A cigarette butt is found at a crime scene that matches the DNA of a suspect.Which of the following is correct?

A gas chromatograph provides the identity of an accelerant by matching ____________ between residue found at the crime scene and known accelerants.

The unit of permil (also known as per mille) is

The polymerase chain reaction involves all of the following except

Gas chromatography (GC) is used to

The most common and rapid method to match paint samples is

What is the most important aspect of paint evidence that is used for comparison purposes?

Portable Electronics: the Periodic Table in the Palm of Your Hand

The Air We Breathe

Radiation From the Sun

Climate Change

Energy From Combustion

Energy From Alternative Sources

Energy Storage

Water Everywhere: A Most Precious Resource

The World of Polymers and Plastics

Brewing and Chewing

Nutrition

Health Medicine

Genes and Life

Filters

Exam 14: Who Killed Drthompson a Forensic Mystery

Electrophoresis is used to

In order to visualize fingerprints from a non-porous surface,the object may be placed within a fuming chamber and exposed to vapors of which substance?

The filaments of headlights are examined after a head-on accident.Both filaments are observed to have extensive deformation.Which of the following scenario likely applies to the accident?

A latent fingerprint is made from the depositing of oils and/or sweat.It is invisible to the naked eye.

It is impossible to detect,remove,and analyze fingerprints from the surface of a victim's skin.

A fire investigation must first focus on finding the fire's origin.

What is the flash point of a solvent?

In order to avoid prosecution,criminals have used acid or sharp objects in an attempt to obscure their fingerprints.Which of the following describes the outcome of this devious attempt?

Which of the following molecules would be nonpolar?

A victim's body was found at a crime scene with a body temperature of 90oF,at an outside temperature of 65oF.The time of death is likely

Blood is taken from a person suspected of driving under the influence of alcohol.If the specimen is kept unrefrigerated at a moderately warm temperature,the blood alcohol concentration will

Stainless steel may be classified as a homogeneous solution.

The principle of like retains like in gas chromatography refers to the similarity of ___________ between the stationary phase and analyte.

A cigarette butt is found at a crime scene that matches the DNA of a suspect.Which of the following is correct?

A gas chromatograph provides the identity of an accelerant by matching ____________ between residue found at the crime scene and known accelerants.

The unit of permil (also known as per mille) is

The polymerase chain reaction involves all of the following except

Gas chromatography (GC) is used to

The most common and rapid method to match paint samples is

What is the most important aspect of paint evidence that is used for comparison purposes?

Portable Electronics: the Periodic Table in the Palm of Your Hand

The Air We Breathe

Radiation From the Sun

Climate Change

Energy From Combustion

Energy From Alternative Sources

Energy Storage

Water Everywhere: A Most Precious Resource

The World of Polymers and Plastics

Brewing and Chewing

Nutrition

Health Medicine

Genes and Life

Filters

A victim's body was found at a crime scene with a body temperature of 90^oF,at an outside temperature of 65^oF.The time of death is likely