UF PHA6936 Final Exam Prep Latest Update 2026 | Forensic
Science, Forensic Toxicology, Lab QA/QC & Miscellaneous
Topics | Exam Prep Guide
1. Describe the significance of the anagen phase in forensic hair analysis.
The anagen phase is significant because it shows hair that is ready to
be shed.
The anagen phase is significant because it indicates active hair
growth, which can provide information about the timing of hair loss
in forensic investigations.
The anagen phase is significant because it is when hair is most
susceptible to damage.
The anagen phase is significant because it represents the resting state
of hair follicles.
2. Consider the three types of fingerprints. Fingerprint ridge impressions left on
a soft material such as putty, wax, soap, or dust are called _.
seated prints
latent prints
plastic prints
acoustic prints
3. Which of the following would be expected to be most useful most often in a
forensic investigation?
A locus with one common allele and 4 very rare alleles.
A locus with 5 alleles, each with population frequencies > 10%.
, All polymorphic loci are about equally useful.
A locus tightly linked to another informative marker.
4. A person's ____________________________ is usually more distinctive than their normal
handwriting.
Printing
Signature
Disguised handwriting
Numbers
5. A positive control:
appears in the 3 o'clock position on all ELISA snap tests
should be ignored if it appears in the 6'oclock position on an ELISA
snap test
tells you the test has not been run properly and should be repeated if
it is the only reaction seen
assures you the test is running properly
6. In a forensic investigation, if a body shows complete rigor mortis, what can
be inferred about the time of death?
The time of death was more than 24 hours ago.
The time of death was less than 6 hours ago.
The time of death was approximately 12 hours ago.
The time of death was within the last hour.
7. Which of the following is useful in determining the time of death?
d. Putrefaction of the body
, b. Post-mortem lividity
All of the above are correct
c. Body temperature
a. Rigor mortis
8. In a forensic case involving a complex mixture of drugs, which extraction
method would likely yield more reliable results and why?
Liquid-liquid extraction, because it can handle larger volumes of
samples.
Solid phase extraction, because it provides higher selectivity and
better isolation of specific drugs.
Liquid-liquid extraction, because it is faster and requires less
equipment.
Solid phase extraction, because it is less expensive than liquid-liquid
extraction.
9. The national DNA database is known as:
IAFIS
TPOX
CODIS
TEDAC
10. What is considered to be the most abused drug?
Methamphetamine
Tobacco
Alcohol
Cannabis
, 11. If a forensic investigator discovers a set of unknown fingerprints at a crime
scene, what steps should they take to ensure accurate entry into the
fingerprint database?
Photograph the fingerprints and enter the images into the database.
Collect, analyze, and digitally scan the fingerprints before entering
them into the database.
Use chemical methods to enhance the fingerprints before entry.
Only collect the fingerprints and enter them without further
processing.
12. Describe how blood spatter analysis can assist in reconstructing a crime
scene.
Blood spatter analysis helps determine the position of the victim
and assailant, the type of weapon used, and the sequence of
events.
Blood spatter analysis is used to identify fingerprints at the scene.
Blood spatter analysis only identifies the blood type of the victim.
Blood spatter analysis can only indicate the time of death.
13. Describe how Solid Phase Extraction contributes to the accuracy of forensic
analysis.
Solid Phase Extraction is a method for fingerprint enhancement.
Solid Phase Extraction only applies to blood spatter analysis.
Solid Phase Extraction helps improve the accuracy of forensic
analysis by removing interfering substances and concentrating the
target analytes.
Solid Phase Extraction is used to create a permanent record of
evidence.
Science, Forensic Toxicology, Lab QA/QC & Miscellaneous
Topics | Exam Prep Guide
1. Describe the significance of the anagen phase in forensic hair analysis.
The anagen phase is significant because it shows hair that is ready to
be shed.
The anagen phase is significant because it indicates active hair
growth, which can provide information about the timing of hair loss
in forensic investigations.
The anagen phase is significant because it is when hair is most
susceptible to damage.
The anagen phase is significant because it represents the resting state
of hair follicles.
2. Consider the three types of fingerprints. Fingerprint ridge impressions left on
a soft material such as putty, wax, soap, or dust are called _.
seated prints
latent prints
plastic prints
acoustic prints
3. Which of the following would be expected to be most useful most often in a
forensic investigation?
A locus with one common allele and 4 very rare alleles.
A locus with 5 alleles, each with population frequencies > 10%.
, All polymorphic loci are about equally useful.
A locus tightly linked to another informative marker.
4. A person's ____________________________ is usually more distinctive than their normal
handwriting.
Printing
Signature
Disguised handwriting
Numbers
5. A positive control:
appears in the 3 o'clock position on all ELISA snap tests
should be ignored if it appears in the 6'oclock position on an ELISA
snap test
tells you the test has not been run properly and should be repeated if
it is the only reaction seen
assures you the test is running properly
6. In a forensic investigation, if a body shows complete rigor mortis, what can
be inferred about the time of death?
The time of death was more than 24 hours ago.
The time of death was less than 6 hours ago.
The time of death was approximately 12 hours ago.
The time of death was within the last hour.
7. Which of the following is useful in determining the time of death?
d. Putrefaction of the body
, b. Post-mortem lividity
All of the above are correct
c. Body temperature
a. Rigor mortis
8. In a forensic case involving a complex mixture of drugs, which extraction
method would likely yield more reliable results and why?
Liquid-liquid extraction, because it can handle larger volumes of
samples.
Solid phase extraction, because it provides higher selectivity and
better isolation of specific drugs.
Liquid-liquid extraction, because it is faster and requires less
equipment.
Solid phase extraction, because it is less expensive than liquid-liquid
extraction.
9. The national DNA database is known as:
IAFIS
TPOX
CODIS
TEDAC
10. What is considered to be the most abused drug?
Methamphetamine
Tobacco
Alcohol
Cannabis
, 11. If a forensic investigator discovers a set of unknown fingerprints at a crime
scene, what steps should they take to ensure accurate entry into the
fingerprint database?
Photograph the fingerprints and enter the images into the database.
Collect, analyze, and digitally scan the fingerprints before entering
them into the database.
Use chemical methods to enhance the fingerprints before entry.
Only collect the fingerprints and enter them without further
processing.
12. Describe how blood spatter analysis can assist in reconstructing a crime
scene.
Blood spatter analysis helps determine the position of the victim
and assailant, the type of weapon used, and the sequence of
events.
Blood spatter analysis is used to identify fingerprints at the scene.
Blood spatter analysis only identifies the blood type of the victim.
Blood spatter analysis can only indicate the time of death.
13. Describe how Solid Phase Extraction contributes to the accuracy of forensic
analysis.
Solid Phase Extraction is a method for fingerprint enhancement.
Solid Phase Extraction only applies to blood spatter analysis.
Solid Phase Extraction helps improve the accuracy of forensic
analysis by removing interfering substances and concentrating the
target analytes.
Solid Phase Extraction is used to create a permanent record of
evidence.
