Final Flashcards
The minerals found in different soil samples cannot effectively be used to determine whether or not they have the same origin.
True or False
False
The cortex of hair derives its major forensic importance from the fact that it contains:
DNA
Pigments
Medullae
Scales
Pigments
After a blood sample is collected for alcohol testing, a(n) ____ is added to stop the blood from clotting.
Fuel cell
Anti-coagulant
Preservative
Monochromator
Anti-coagulant
What is the logical first step in soil analysis?
Examination of minerals and rocks under high-power magnification
Use of density-gradient tube technique
Comparison of dried soil sample for color and texture
Examination for presence of debris under low-power magnification
Comparison of dried soil sample for color and texture
It is a virtual certainty that faces two fabrics share a common origin if their fibers:
Can be fitted together at their torn edges
Have the same color
Appear identical in cross section
Have the same situations
Can be fitted together at their torn edges
Emission spectroscopy measures the frequency of light emitted by an atom when one of its electrons moves to a higher orbital
True or False
False
The toxicologist’s capabilities are NOT directly dependent on the input from the:
Attending physician
Medical examiner
Case prosecutor
Police
Case prosecutor
PCR is a technique that:
Provides a statistical analysis of the nitrogenous-base pairings
Virtually eliminates operator error from DNA-analysis
Produces information regarding the sequence of nitrogenous bases
Can produce many exact copies of segments of DNA
Can produce many exact copies of segments of DNA
IN the PCR process, the first step is to heat the DNA strands. This is to permit the:
Double-stranded molecules to separate completely
Hybridization to take place
Process to take place without DNA degradation
DNA to coil very tightly in the helical shape
Double-stranded molecules to separate completely
A fiber whose microscopic appearance includes being ribbon-like in shape (flat) with twists at irregular intervals is:
Linen
Kapok
Polyester
Cotton
Cotton
Upon entering the bloodstream, heroin is almost immediately metabolized into:
Morphine
Opium
Cocaine
Procaine
Morphine
The use of which drug will NOT lead to physical dependence?
Alcohol
Cocaine
Barbiturates
Heroin
Cocaine
Which is an initiating explosive often used in detonators?
PETN
Dynamite
TNT
Lead azide
Lead azide
The clumping together of red blood cells by the action of an antibody is known as:
Clotting
Radioimmunology
Serology
Agglutination
Agglutination
Duquenois-Levine solutions were used on a sample and the chloroform layer turned purple. This suggests that the tested substance is:
Heroin
Valium
Cocaine
Marijuana
Marijuana
Which is available in commercial form as fertilizer?
Triacetone triperoxide
Ammonium nitrate
Diazodintrophenol
Potassium chlorate
Ammonium nitrate
The DOT set the maximum allowable blood alcohol concentration for commercial truck and bus drivers at:
0.04%
0.02%
0.05%
0.08%
0.04%
Chromosomes are the fundamental units of heredity:
True or False
False
A fuel can only achieve combustion in:
The gaseous state
A liquid-solid phase
The liquid state
The solid state
The gaseous state
Which is a technique used to screen objects for the presence of explosive residues?
X-ray diffraction
Mass spectrometry
Ion-mobility spectrometry
Infrared spectrophotometry
Ion-mobility spectrometry
How many different bases are associated with the makeup of DNA?
6
3
4
5
4
The emission spectrograph is used to determine
Crystalline structure of a substance
Elemental composition of a substance
Weight of a substance
Mass of a substance
Elemental composition of a substance
The variety of coatings applied to the body of an automobile adds significant diversity to automobile paint and contributes to the forensic significance of automobile paint comparisons
True or False
True
In DNA replication, polymerases:
Separate the strands of the double helix
Enable the strands to unwind from the helix
Help assemble the new DNA strands in proper base sequence
All of the above
Help assemble the new DNA strands in proper base sequence
There is a(n) ____ relationship between the amount of alcohol in the blood and that in the alveolar breath.
Undetermined
Indirect
Direct
Variable
Direct
Blood is drawn from a living suspect involved in an automobile accident. If the specimen is kept unrefrigerated and at a moderately warm temperature the alcohol concentration can be expected to:
Either increase or decrease with time
Remain unchanged
Increase with time
Decrease with time
Decrease with time
Which hallucinogen can be synthesized by a simple chemical process and is often manufactured in clandestine laboratories?
Marijuana
Mescaline
LSD
PCP
PCP
What is the number of nitrogenous bases needed to code for a specific amino acid?
3
2
5
6
3
The amount of acid phosphates in seminal fluid is ____ the amount of acid phosphatase in the blood
Greater than
The same as
Less than
None of the above
Greater than
A breath test may be used to analyze:
Marijuana
Ethyl alcohol
Barbiturates
All of the above
Ethyl alcohol
Which step in the examination of fibers would logically be taken first?
Infrared spectrophotometry
Examination of dye composition using visible light microspectrophotometer
Microscopic examination for color and diameter of fibers
Making a cross sectional view of the fiber
Microscopic examination for color and diameter of fibers
A typical STR DNA type emanating from a single individual shows a ____ band pattern
Three
Two
Zero
Four
Two
Drugs deemed to have the highest potential for abuse and having a current medical use are listed in which schedule for the Controlled Substances Act?
I
III
IV
II
II
Nuclear DNA typing can be most successfully accomplished on hairs that have been removed during which stage of growth?
Catagenic
Anagenic
Mutogenic
Telogenic
Anagenic
In routine blood banking, which antigen(s) must be determined in testing for compatibility?
A
B
D
All of the above
All of the above
DNA is a(n):
Protein
Enzyme
Starch
Polymer
Polymer
Which part of the hair shaft is most resistant to chemical decomposition?
Cortex
Cuticle
Follicle
Medulla
Cuticle
The DRE program incorporates standardized methods for examining suspects to determine:
Whether they have ever taken one or more drugs
Whether they are transporting any illegal substances or not
Whether they are involved in the buying or selling of drugs
Whether they are under the influence of one or many drugs
Whether they are under the influence of one or many drugs
In the case of Schmerber v. California, blood was categorized as being:
Direct evidence
Nontestimonial evidence
Indirect evidence
Testimonial evidence
Nontestimonial evidence
What is the concentration at which vapor-to-fuel mixture in the air is capable of burning?
Flammable range
Lethal range
Heat of combustion
Spontaneous concentration
Flammable range
The Reinsch test would NOT be used to detect:
Mercury
Arsenic
Bismuth
Copper
Copper
Which part of cannabis contains the LEAST amount of THC?
Resin
Seeds
Leaf
Flower
Seeds
Which of the following properties should not be examined when comparing two synthetic fibers?
Diameter
Lengthwise striations
Medullary index
Presence or absence of delustering particles
Presence or absence of delustering particles
Which is NOT part of the composition of paint?
Adhesive
Binder
Pigment
Solvent
Adhesive
Which coating provides resistance to corrosion?
Basecoat
Electrocoat primer
Clearcoat
Primer surface
Electrocoat primer
Whole blood collected for DNA typing purposes must be placed in a container with the preservative:
CODIS
Rh factor
Ethylene glycol
EDTA
EDTA
The building blocks of the DNA molecule are known as:
Nucleotides
Amino acids
Polysaccharides
Hydrocarbons
Nucleotides
When investigators search a fire scene, the first focus must be on:
Finding the origin of the fire
Taking photographs and making sketches
Interviewing eyewitnesses
All of the above
Finding the origin of the fire
Which instrumentation is considered the most sensitive and reliable for detecting and characterizing flammable residues?
GC
IR
NAA
TLC
GC
Use this DNA STR pattern of evidence from a rape investigation to answer the following question. Note that suspect B has only one band in his lane. this is most likely an indication that:
He is homozygous for the gene
He is trisomic for the trait
His DNA was contaminated during the collection process
Band shifting occured
He is homozygous for the gene
The amount of DNA material required for STR analysis is ___ the amount of DNA required for RFLP analysis
The same as
Greater than
Less than
None of the above
Less than
A stain tentatively can be identified as blood by:
The luminol test
The phenolphthalein test
The benzidine test
All of the above
All of the above
The investigator should not try to remove trace paint evidence found on a tool but package the tool laboratory examination instead:
True or False
True
Marijuana is considered to be a:
Narcotic
Depressant
Stimulant
Hallucinogen
Stimulant
Many explosives must have their own source of:
Energy
Oxygen
Heat
Fuel
Oxygen
People with type O blood have both A and B antigens on their red blood cells
True or False
False
Which is NOT a synthetic fiber?
Polyester
Acrylic
Rayon
All answers are synthetic
Rayon
The Marquis Reagent was used on drug evidence and it turned purple. The drug being tested could be:
Either A or B
Heroin
Cocaine
Methadone
Heroin
The analytical technique widely used for directly measuring the amount of alcohol present in the blood is:
Ultra-violet spectrophotometry
Gas chromatography
Infrared spectrophotometry
Thin-layer chromatography
Gas chromatography
Most narcotics are:
Depressants to the central nervous system
Obtains from opium
Physically addicting
All of the above
All of the above
An element is selective in the frequency of light it will absorb. This selectively is due to its:
Proton cloud
Electron energy levels
Number of neutrons
Atomic mass
Electron energy levels
What type of evidence would be expected to have trace elements?
Paint and bullet fragments
Glass and metal objects
Soil and gun primer particles
All of the above
All of the above
Which is true of the use of mild tranquilizers?
They reduce tension
They impair high-thinking faculties
They induce sleep
They do not produce dependency
They reduce tension
The Controlled Substance Act established five schedules of classification for substance based on the drugs:
Potential for physical dependence
Potential for psychological dependence
Medical value
All of the above
All of the above
Automobile finishes typically contain which layer(s)?
An electrocoat primer, colorcoat, and clearcoat
Colorcoat
Electrocoat primer and colorcoat
Clearcoat
An electrocoat primer, colorcoat, and clearcoat
Standard/reference soil samples should be collected at the site of the crime at various intervals within a 100-foot radius of the crime scene
True or False
True
The specificity of microcrystalline tests is _____ the specificity of color tests
The same as
Less than
Greater than
None of the above
Greater than
Analyzing segments of hair for drug content may define the timeline for drug use, dating it back over a period of:
Years
Weeks
Days
All of the above
All of the above
The rate at which large DNA fragments move through the electrophoretic gel is ____ the rate at which small DNA fragments move through the same apparatus
Less than
Greater than
The same as
None of the above
Less than
Which absorption spectrum is equivalent to a “fingerprint” of a substance and can be used for identification purposes?
X-ray
IR
UV
Visible
IR
It is not necessary that the collected paint from a vehicle involved in a hit-and-run accident be close to the area of the car suspected of being in contact with the victim
True or False
False
The presence of high levels or carbon monoxide in the blood of a victim found at the scene of a suspicious fire is proof that the victim:
Died elsewhere and was brought to the fire scene after death
Died before the fire started
Perished after the fire was started
Was the arsonist
Perished after the fire was started
Which of the following is considered to be a hallucinogen?
Phencyclidine (PCP)
Mescaline
Psilocybin
All of the above
All of the above
A drug recognition expert (DRE) can:
Advise the toxicologist as to which drug may be impairing an individual
Identify street drugs by their appearance
Help a drug user acknowledge his/her habit and suggest ways to become drug-free
Determine whether a person has taken one or more drugs
Advise the toxicologist as to which drug may be impairing an individual
Carbon monoxide is toxic because it:
Combines with hemoglobin to form carboxyhemoglobin
Causes platelets to clump
Activates killer white blood cells
Destroys red blood cells
Combines with hemoglobin to form carboxyhemoglobin
Aspermia is an abnormally low sperm count
True or False
False
Which technique allows for both separation and specific identification of a questioned mixture of substances?
UV spectrophotometry
IR spectrophotometry
GC
GC/MS
GC/MS
Which is an explosive readily detonated by heat or shock?
ANFO
Primary explosive
Secondary explosive
Dynamite
Primary explosive
After examining small paint chips from an auto accident scene and using PDQ database, the crime lab worker can determine the _____ of a vehicle.
Year
Model
Make
All of the above
All of the above
A compound can tentatively be identified by gas chromatography from its:
Retention time
Partition coefficient
Carrier gas
Rf value
Retention time
Which race is most likely to have head hair with continuous medullae?
Caucasian
Native American
Negroid
Mongoloid
Mongoloid
The tranquilizers Valium and Librium are classified in which schedule of the Controlled Substances Act?
IV
II
I
III
IV
Which physical symptom is part of the abstinence syndrome?
Stomach cramps and vomiting
Body chills
Convulsions
All of the above
All of the above
STRs normally consist of repeating sequences of:
3-7 bases
13-17 bases
18-20 bases
8-12 bases
3-7 bases
A substance with a pH of 8 is likely to be:
Basic
Acidic
Neutral
Water
Basic
Neuron activation analysis involves bombarding specimens with neutrons and then measuring the resultant:
Beta particles
X-rays
Alpha particles
Gamma rays
Gamma rays
The central canal running through many hairs is known as the:
Cortex
Shaft
Cuticle
Medulla
Medulla
Luminol can be used at crime scenes to:
Light up the crime scene with a high degree of illumination
Detect traces of blood without compromising potential DNA typing
Make hair evidence fluoresce
Locate latent prints that otherwise would be overlooked
Detect traces of blood without compromising potential DNA typing
How should blood-containing clothes from a victim be packaged?
In an airtight clear plastic container
In a metal paint can
In an airtight metal container
In breathable paper after blood has dried
In breathable paper after the blood has dried
Most human cells contain forty-six chromosomes, arranged in twenty-three mated pairs
True or False
True
Which chemical reaction is associated with a fire?
Reduction
Oxidation
Precipitation
None of the above
Oxidation
What is true about monoclonal antibodies?
They are produced by injecting a mouse with an antigen
They are produced utilizing rapidly multiplying blood-cancer cells
They can be produced using mice
All of the above
All of the above
The rate of alcohol absorption on a full stomach is ____ the rate of absorption on an empty stomach
The same as
Less than
None of the above
Greater than
Less than
PSA (p30) is a:
Protein specific to females
Blood enzyme used to discriminate bloodstains
Polymorphic enzyme found in red blood cells
Protein found in seminal plasma
Protein found in seminal plasma
Which would produce “fingerprints” of the fibers?
Infrared spectrophotometry
Examination of dye composition using visible light microspectrophotometer
Microscopic examination for color and diameter of fibers
Making a cross-sectional view of the fibers
Infrared spectrophotometry
Which of the following properties should be examined when comparing two fibers?
Diameter
Birefringence
Color
All of the above
All of the above
Which nitrogenous base is NOT found in DNA?
Uracil
Adenine
Cytosine
Thymine
Uracil
If blood is found to have both A and B antigens it is typed as:
A
B
AB
O
AB
A human head hair is best characterized by:
Its color
A medulla that is more that 1/2 the overall diameter of the hair shaft
A medulla that is absent or less than 1/3 the overall diameter of the hair shaft
The absence of a cortex
A medulla that is absent or less than 1/3 the overall diameter of the hair shaft
The separation of STRs using capillary electrophoresis:
Is currently the preferred method
Evolved from the flat-gel electrophoresis approach
Decreases analysis time
All of the above
All of the above
Rayon is classified as a:
Plant fiber
Synthetic fiber
Regenerated fiber
Natural fiber
Regenerated fiber
The ____ properties of crystals, such as refractive index and birefringence, provides points of identification that help characterize them
Chemical
Optical
Amorphous
Physical
Optical
Paint as physical evidence is most frequently encountered in:
Burglary
A hit-and-run
Car theft
Both A and B
Both A and B
Which would be LEAST useful in identifying a mineral crystal?
Geometric shape
Size
Color
Refractive index
Size
Which is often used as the explosive core in a detonating cord?
TNT
SOFT
PETN
C-4
PETN
Which coat represents the “eye appeal”?
Electrocoat primer
Clearcoat
Basecoat
Primer surface
Clearcoat
Arson investigators must work quickly to collect evidence at a fire scene because:
Accelerants in soil may rapidly degrade
Accelerant residues may quickly evaporate
Safety requirements may require that cleanup and salvage operations begin quickly
All of the above
All of the above
In which phenotype pairings can the genotypes of the individuals can be directly known?
Type B and Type O
Type A and Type AB
Type AB and Type O
Type A and Type B
Type AB and Type O
Which of the following statements is false?
The Kastle-Meyer test is used to determine whether blood is of human origin
Non-human blood also contains proteins with peroxidase like activity
A-B-O antigens are present in all human blood
Dried bloodstains may tentatively be identified as blood by peroxidase test
The Kastle-Meyer test is used to determine whether blood is of human origin
Which is the most widely used and abused drug?
Heroin
Alcohol
Marijuana
Cocaine
Alcohol
Type AB blood contains:
Anti-A antigens and anti-B antibodies
Anti-A antibodies and B antigens
Both A and B antigens
Both anti-A and anti-B antibodies
Both A and B antigens
Which is a homemade explosive that has been used by terrorist organizations in the Middle East?
RDX
TATP
TNT
PETN
TATP
The concept of simultaneously extracting, amplifying, and detecting a combination of STRs is known as:
PCR
THO1
Electrophoresis
Multiplexing
Multiplexing
Which is the most widely used illicit drug in the United States today?
Heroin
Cocaine
Marijuana
Alcohol
Marijuana
Complex chromatographic accelerant patterns can be simplified by:
Mass spectrometry
Thin-layer chromatography
Gas chromatography
Headspace analysis
Mass spectrometry
The D antigen is also known as the ___ antigen
Rh
X
AB
Monoclonal
Rh
For the purpose of extracting the drug out of body tissues, an amphetamine is classified as an:
Acid drug
Basic drug
Neutral drug
All of the above
Basic drug
Telltale signs of arson include:
Trails of burn patterns
Separate points of origin
The presence of containers
All of the above
All of the above
Biological evidence should be packaged in plastic or airtight containers
True
False
False
Which property imparts paint with its most distinctive forensic characteristics?
Color-layer sequence
Gloss
Color
Texture
Color-layer sequence
Assume that two strands of DNA have been separated and that the base sequence on one strand is ATGC, State the sequence of bases on the second strand
GCAT
TGGC
ACTC
TACG
TACG
Barbiturates act to:
Promote relaxation
Produce sleep
Create a feeling of well-being
All of the above
All of the above
The concentration of alcohol in an exhaled breath is in direct proportion to that of the blood of the same individual. The ration of this relationship is closest to:
1:100
1:2,000
1:10
1:1,000
1:2,000
Field sobriety tests that can be employed to ascertain the degree of an individual’s alcohol impairment normally do not include the following:
Horizontal gaze nystagmus
Portable, roadside breath tester
Gas chromatography
Walk and turn
Gas chromatography
Which type(s) of screening and confirmation tests are used for analyzing evidence of explosives?
TLC
Gas chromatography/ mass spectrometry
Color spot tests
All of the above
All of the above
Heroin is a chemical derivative of:
Barbituric acid
Methadone
Morphine
Codeine
Morphine
Buccal cells are obtained from:
The mouth and inside of the cheek
Blood
Urine
Semen
The mouth and inside of the cheek
Which of the following CANNOT be determined from a laboratory examination of evidence recovered from an arson?
The ignition mechanism used by the arsonist
The presence of gasoline, kerosene, or turpentine in debris
The brand name of gasoline used to start the fire
Origin of liquid gasolines
The brand name of gasoline used to start the fire
Acid-phosphate is a major constituent of:
Perspiration
Blood
Semen
Saliva
Semen
Methamphetamine is a:
Stimulant
Hallucinogen
Depressant
Tranquilizer
Stimulant
Which is NOT a high explosive?
TNT
Black powder
RDX
Dynamite
Black powder
Which component of DNA forms the backbone of the molecule?
Sugar
Nitrogenous base
Phosphate group
Both A and C
Both A and C
In forensic toxicology, all positive drug findings must be confirmed by a specific chemical test. The confirmation test of choice is:
Gas chromatography
Infrared spectrophotometry
Ultraviolet spectrophotometry
Gas chromatography-mass spectrometry
Gas chromatography-mass spectrometry
An individual who is type O has:
O antibodies
B antibodies
A antibodies
Both A and B antibodies
Both A and B antibodies
A gene pair made up of two similar alleles-for example, AA and BB- is said to be:
Homozygous
Monoclonal antibodies
Heterozygous
Complementary
Homozygous
The presence of ___ indicates that a stain is seminal in nature
p30
PGM
DNA
Peroxidase
p30
Which is a chemical used to synthesize the explosive TATP?
Aluminum
Magnesium
Hydrogen peroxide
Potassium chlorate
Hydrogen peroxide
If soil is found adhering to an object, the investigator should remove the soil particles from the object and send them to the laboratory
True
False
False
Hydrocarbon accelerants can be detected by:
A portable detector (sniffer)
Trained dogs
Most people
Both A and B
Both A and B
Medullae may be classified as being:
Continuous
Interrupted or absent
Fragmented
All of the above
All of the above
Which statement is true?
Hair can be individualized through its trace elemental composition
Two hairs from the same head may not have the same morphological characteristics
Hair is not routinely examined to determine sex
The racial origin of hair can always be identified
Two hairs from the same head may not have the same morphological characteristics
About 95-98 percent of alcohol is oxidized to what two substances?
Water and carbon dioxide
Carbon dioxide and dehydrogenase
Water and acetic acid
Acetaldehyde and acetic acid
Water and carbon dioxide
What is true about the “club drug” Rohypnol?
It is enhanced when combined with alcohol
It is odorless, colorless, and tasteless
It results in loss of memory of what happened in the hours after ingestion
All of the above
All of the above
The visible light microspectrophotometer is a convenient tool with which to compare the color of fibers because:
Very small samples can be compared
Fibers can be studied right on a microscope slide
Fibers are not destroyed
All of the above
All of the above
The layers of hair shaft are the ____, the ______, and the ____
Cuticle; root; medulla
Pigment; cortex; pigment
Cuticle; cortex; medulla
Cortex; mitochondria; pigment
Cuticle; cortex; medulla
The molecular structure of DNA was deduced by:
Gregor Mendel
James Watson
Francis Crick
Both B and C
Both B and C
Which is NOT a factor in determining the rate at which alcohol is absorbed into the bloodstream?
The presence or absence of food in the stomach
The alcoholic content of the beverage
The amount consumed
All of the above are factors
All of the above are factors
Which of the following depicts correct base-pairing in DNA?
C-T
A-U
T-A
G-A
T-A
Beard hairs are coarse and normally ____ in cross-section
Triangular
Oval
Ribbon-like
Round
Triangular
By far the most prevalent plant fiber is:
Silk
Linen
Cotton
Kapok
Cotton
What is the major advantage of using the vapor concentration technique with gas chromatography?
Ability to determine relative concentration of solid residues
Low resolution of peaks associated with volatile residues
High sensitivity for detecting volatile residues
Only non-volatile residues will be detected
High sensitivity for detecting volatile residues
A regenerated fiber can be derived from:
Acetate
Rayon
Cellulose
Polyester
Cellulose
The concentration of the absorbing element is directly proportional to the quantity of the light absorbed
True or False
True
Nonmotile sperm generally survive for up to four to six hours in the vaginal cavity of a living female
True or False
False
Microscopic hair comparisons must be regarded by police and courts as:
Individualizing
Useless
Presumptive
Conclusive
Presumptive
Alcohol is oxidized in the body primarily in:
The stomach
The liver
The small intestine
The lungs
The liver
What is the rapid combination of oxygen with a fuel, which produces a noticeable release of energy?
Explosion
Combustion
Ignition
The flash point
Combustion
Alcohol is eliminated from the body chemically unchanged in:
Urine
Perspiration
Breath
All of the above
All of the above
The technology of DNA typing had its beginnings in 1985 with the work of:
Henry Lee
Francis Crick
James Watson
Alec Jeffreys
Alec Jeffreys
Means to detect the amelogenin gene are included in commercial STR kits used in crime labs because the gene allows determination of:
Ethnicity
Blood type
Gender
Eye color
Gender
Use of which if the following drugs is LEAST likely to lead psychological dependence?
Alcohol
Heroin
Codeine
Cocaine
Codeine
The discriminating power of mtDNA is ____ the discriminating power of STR analysis
Greater than
Less than
The same as
None of the above
Less than
Paint chips may be individualized to a single source by examining their:
Color and layer structure
Ultraviolet spectra
Pyrograms
Infrared spectra
Color and layer structure
After the paint has been applied to a surface, the solvent evaporates
True or False
True
Which feature of hair is MOST important in making a species identification?
Scale pattern
Shaft length
Bulb size
Follicle shape
Scale pattern
Antibodies are found:
In the blood serum
In the solid portion of blood
In the red blood cells
In the white blood cells
In the blood serum
One parent is type AB; the other parent is type O. A possible genotype for an offspring is:
AO
OO
AB
None of the above
AO
Forcibly removed hairs are most likely to provide useful DNA evidence because they bear:
Catagenic roots
Telogenic roots
Follicular tissue
Mitochondria
Follicular tissue
Paint binders can be chemically analyzed using:
TLC
Pyrolysis GC
IR spectrophotometry
Both B and C
Both B and C
High explosives can be classified as either _____ or _____ explosives
Initial; secondary
Primary; secondary
Military grade; non-military grade
Civilian; military
Primary; secondary
Most explosives can be recovered from debris for future study by being rinsed with:
Toluene
Water
Kerosene
Acetone
Acetone
As currently performed, DNA-profiling technology cannot provide information helpful in:
Matching a suspect to biological evidence found at a crime scene
Settling matters of questioned paternity/maternity
Determining whether an individual carries a genetic defect
Deciding immigration cases based on family relationships
Determining whether an individual carries a genetic defect
he Dillie-Koppanyi reagent is useful in screening for:
Opiates
Barbiturates
Amphetamines
Marijuana
Barbiturates
he rate of human hair growth per month is:
1 cm
1 dm
1 inch
1 mL
1 cm
Which is the most widely used low explosive?
Potassium chlorate and sugar
Black powder
Smokeless powder
Both B and C
Both B and C
