for quiz 1

100問 • 1年前

Leslie Munoz Diaz

通報

問題一覧

DNA is located in the _____ of a cell.

nucleus

All of the following would have different DNA, except:

identical twins

Forensic biologists compare DNA samples by looking at how many markers?

The PCR technique:

makes millions of copies of the DNA markers

The four steps of DNA processing are:

extract, amplify, separate, analyze

Vitreous humor is found in the

eye

What does SCREENING test accomplish?

checks for the presence or absence of chemicals

What happens to a chemical when it is analyzed by the Gas Chromatography/ Mass Spectrometer (GC/MS)?

it is broken into fragments which are each counted to create a graph

A mass spectrum of a chemical:

will be unique, unlike the mass spectrum of any other chemicals

How do CSIs ensure that evidence does not get tampered with?

anytime someone examines evidence, they must sign a chain of custody form

What is a positive control

a sample prepared by the toxicologist which has a specific chemical present

The ___ marks the bullet with the gun’s unique characteristics.

rifling

What is the calliber of this bullet

9mm

Where do investigators test fire a suspected gun in order to get individual characteristics of the gun

in a water tank

What equipment do investigators use to analyze striations on bullets

comparison microscope

A 9mm bullet was collected from the victim, and two firearms were found at the crime scene. Both gun 1 and gun 2 9mm bullets. How can the investigators determine which gun fired the bullet?

test fire the suspected guns and compare the bullet striations to the fatal bullet

Which of the following is not determined by a medical examiner

place of death

An internal autopsy always begins with a ___.

y incision

During an autopsy, the examiner sticks the syringe into ___ to collect a blood sample for further analysis

the heart

The term “rigor mortis” refers to:

the body’s muscles stiffening after death

Where does a medical examiner measure the body tempature of a dead person?

the liver

There are three important things a medical examiner looks for when determining the time of death. Which is NOT one of them?

Odor mortis

What causes fingerprints to be left behind when we touch things?

Natural sweats and oils in the skin

IAFIS is the FBI’s national fingerprint database. Criminologists often search the database for fingerprint matches. What does IAFIS stand for?

Integrated Automated Fingerprint Identification System

During fuming, the super glue heats up and attaches to _____ in the fingerprint.

Amino acids and oil

Evidence is usually placed in a superglue _____ when developing the fingerprints.

chamber

DNA (deoxyribonucleic acid) is the genetic material in our cells that controls what we inherit from our parents. Which of the following statements is true?

Except identical twins, no two individuals have the exact same DNA.

What system used by the FBI compiles DNA of known violent offenders from all over the nation and can be used to match DNA with a sample found at a crime scene?

CODIS

A woman gets out of bed, watches TV, talks on the phone, pets her cat, and then goes shopping. Which object would be most useful in collecting the woman’s DNA sample?

the phone

Decide the correctness of the following statement: You can alter your DNA so it will appear to be different.

false

A mitochondrion is the site of energy production and contains copies of mitochondrial DNA. Which one is it in the cell below?

Which of the following statements is true?

In a cell, there are much more copies of mitochondrial DNA than nuclear DNA.

According to this family tree, which pair of people must have the same mitochondrial DNA? (John and Cathy are married. They have two children (Mark and Dianne) and three grandchildren (Kate, Ann and Mathew), as is shown in the family tree below.)

Cathy and Ann

The cuticle is the outside covering of a hair, and it has three different scale patterns. Which of the following pictures shows the cuticle scale that is found in a human hair?

What must be present in a hair sample to test for nuclear DNA?

Follicular tag

John uses a microscope to exam hair samples from four different animals. Below is what he sees from each sample. Which one is most likely to be from a human?

There are various methods to document or preserve the bitemark on a victim. Which is NOT one of them?

The tissue and skin of the bite site is frozen for future comparisons.

The anterior teeth are the front-most teeth that usually produce a bitemark. What do the anterior teeth consist of?

Incisors and canine

Picture A below is likely to be a dog bite, and picture B is likely to be a human bite. Which statement is part of the reasoning for this judgment?

The bitemark in picture A is oval shaped, while the one in picture B is roughly circular.

When photographing a bitemark, what tool is commonly used to document the measurements of the bitemark?

An ABFO NO. 2 scale

You have a photo of the bitemark on a victim and have identified a suspect. Below is a list of tasks you need to complete before you can decide if his/her teeth match the bitemark. What is the correct order to complete these tasks? A. Create a 3D cast of the suspect’s teeth B. Compare the end product with the bitemark photo C. Take dental impression from the suspect D. Trace the outline of the teeth onto a transparent sheet

CADB

Does the sample below contain chemical A? To test if a sample contains chemical A, the examiner used a reagent that reacts with chemical A to produce an orange color. The picture on the right shows the results on the testing tray. Use this information to answer the following questions

Yes

What does “negative control” mean in this test?

It means a sample that purposely does not contain chemical A.

What should be used as a positive control?

chemical A

When is the victim’s sample taken for a toxicology screen?

At the morgue

A toxicologist is responsible for:

Testing blood and bodily fluids for poisoning

A medical examiner autopsy does NOT require_______________.

Permission from the next-of-kin

Which chemical can be used to detect blood, even if it’s been wiped from a surface?

luminol

Blunt force trauma refers to:

Fractures, broken bones and external bruising.

Identifying a specific person can best be achieved by____________.

Fingerprint analysis

A special type of microscope that allows two separate objects to be views simultaneously in the same ocular is known as a ____.

Comparison microscope

What causes fingerprints to be left behind when we touch things?

Natural sweats and oils in the skin

There are three main classes for fingerprints based upon their visual pattern. Which of the following is NOT one of them?

Spirals

How would this fingerprint be classified?

whorls

Fingerprints that you cannot see with the naked eye are called latent prints. Which of the following substances is often used to develop latent fingerprints?

Super- glue

DNA (deoxyribonucleic acid) is the genetic material in our cells that controls what we inherit from our parents. Which of the following statements is true?

Except identical twins, no two individuals have the exact same DNA.

What system used by the FBI compiles DNA of known violent offenders from all over the nation and can be used to match DNA with a sample found at a crime scene?

CODIS

A woman gets out of bed, watches TV, talks on the phone, pets her cat, and then goes shopping. Which object would be most useful in collecting the woman’s DNA sample?

the phone

Decide the correctness of the following statement: You can alter your DNA so it will appear to be different.

false

Which part in the cell below contains most of the DNA?

If we compare a boy’s DNA with his parent, what result will we find out?

50% of the child’s markers are identical to his mother.

Are these two DNA profiles a match?

A plastic shoe print occurs when a shoe sinks into a soft substance like mud. How would an investigator collect a plastic shoe print from the crime scene?

Use dental plaster to make a cast of the shoe print

Below are steps involved in making a cast of a shoe print. What is the correct order in this process? A. Remove the casted mold from the shoe prints B. Mix dental plaster with water C. Apply hairspray to the site D. Pour the dental plaster mix next to the shoe prints

CBDA

Class characteristics of a shoe print are marks that are a direct result of the manufacturing process of the shoes. Which of the following is not one of the class characteristics?

Random cut on the shoe’s sole

When doing shoe print comparison, investigators have to identify ________________ in order to decide if the shoe prints are a match.

the unique markings of the shoe

In facial reconstruction, which is one of the crucial factors when considering the tissue depth?

gender

Which statement is true about facial reconstruction?

Teamwork of artists and forensic scientists on reconstruction projects increases the success rate for identification.

Which lab equipment is usually used to analyze toolmark evidence?

comparison microscope

How do investigators know a suspected knife is the weapon that was used to kill the victim?

They take impressions from the wound and the knife toolmark and see if there is a match.

What is the first step in analyzing digital evidence from a computer?

Use imaging tools to create an exact duplicate of the hard drive.

Which of the following is what investigators would do when they examine a computer?

Discover and crack passwords to gain access to information.

Which of the following is considered part of the medical examiner’s job?

Documenting wounds on the body

A corpse is discovered buried in a field. It may be Jenny who was reported missing a few years ago and is now feared dead. The body is decomposed and is not easily identifiable. How might the investigator decide whether the body is Jenny?

match Jennys dental records with the teeth and jaw of the body. match Jenny’s dental records with the teeth and jaw of the body analyze the skeletal remains to decide the gender of the body

Which of the following findings from a fire scene suggests that the fire was arson?

Foreign ignitable liquids in burned material

After a fire the molten wires in electrical cords often assume the shape of beads. If the demarcation (Border) of such a bead is not sharp, it suggests that ____ has cause the fire

burning from the outside

After a fire, window glass often shows a complicated pattern of short cracks, which is called crazing. What causes crazing?

Rapid cooling of hot glass.

What technique would a forensic scientist use to confirm if an ignitable liquid was used to start a fire?

Gas chromatography

To confirm if somebody died from smoke inhalation during a fire, the amount of __________ in the blood is determined.

carboxyhemoglobin

Spectrophotometry is a method that is based on the ability of molecules to __________ light.

absorb

You are setting up a headspace gas chromatography analysis to determine the amount of ethanol in a sample. What would you choose as a positive control?

ethanol

Look at the gas chromatogram below. What do the different peaks represent?

Different chemicals in the sample

A suspect has been found to have amphetamines in his blood. What technique can be used to find out which specific amphetamine it is?

Gas chromatography/Mass spectrometry

The bloodstain shown in the picture below would be labeled as a ________ type blood stain.

passive

When analyzing impact type of bloodstains (blood spatter shapes), the direction in which the blood traveled can be determined by …

noticing which direction the pointed ends of the blood stains face

Based on the photograph below, where did the impact of the bullet that caused this blood spatter come from?

from the left

Passive bloodstains are usually _______ wide.

greater than 4mm

How many DNA markers do forensic biologists use to compare DNA samples?

The PCR (polymerase chain reaction) technique:

Makes millions of copies of the DNA markers

The four steps of DNA processing are:

Extract, Amplify, Separate, Analyze

What do forensic scientists compare to establish if two DNA profiles such as the ones below match?

the pattern of the peaks

What is the first step when extracting DNA from a blood sample?

break the blood cells apart to release the DNA

The picture below is a part of a real DNA profile, showing one marker. Why does this marker have two different peaks?

the person has different copies of the marker

Why do markers in a DNA profile, like the one show below with marker #13 highlighted, sometimes have only one peak?

The person inherited the same marker from BOTH parents.

In an external autopsy, a gunshot wound with abrasions and blackening can be classified as a __________ wound.

contact

During an external autopsy of a shooting victim, the medical examiner finds small abrasions, also called powder tattooing, on the victim’s skin around the gunshot wound. What can you deduce from this finding?

hey gun was fired from an intermediate range (1cm to 4m)

Fingernail swabs collected during an autopsy are used to ___

extract DNA to identify potential suspects

In an external autopsy, a gunshot wound with abrasions and blackening can be classified as a __________ wound.

contact

A 9 mm bullet was collected from the victim. Both guns found at the crime scene use 9 mm bullets. How can the investigators determine which gun fired the bullet?

Compare the bullet striations from the crime scene guns to the bullet collected from the victim.

100

Rifling is one characteristic forensic scientists compare to see if two bullets come from the same gun. Conventional type rifling means the grooves on the surface of a bullet are _______

deep, easy to see

Chp 9

Leslie Munoz Diaz · 8問 · 2年前

Chp 9

8問 • 2年前

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chp 10

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chp 10

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Chp 11

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Chp 11

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test 1

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test 1

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quiz 1

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quiz 1

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test 2

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test 2

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test 2 pt.2

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test 2 pt.2

35問 • 1年前

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midterm

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midterm

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midterm

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midterm

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quiz 11-20

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quiz 11-20

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chapters questions

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chapters questions

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midterm

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midterm

53問 • 1年前

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chapter questions for DNA and Blood

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chapter questions for DNA and Blood

80問 • 1年前

Leslie Munoz Diaz

slides for DNA

Leslie Munoz Diaz · 52問 · 1年前

slides for DNA

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slides for blood

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slides for blood

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Final

Leslie Munoz Diaz · 64問 · 1年前

Final

64問 • 1年前

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final pt 1.

Leslie Munoz Diaz · 35問 · 1年前

final pt 1.

35問 • 1年前

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toxicology chapter questions

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toxicology chapter questions

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Leslie Munoz Diaz

juvenile justice review

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juvenile justice review

29問 • 11ヶ月前

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問題一覧

DNA is located in the _____ of a cell.

nucleus

All of the following would have different DNA, except:

identical twins

Forensic biologists compare DNA samples by looking at how many markers?

The PCR technique:

makes millions of copies of the DNA markers

The four steps of DNA processing are:

extract, amplify, separate, analyze

Vitreous humor is found in the

eye

What does SCREENING test accomplish?

checks for the presence or absence of chemicals

What happens to a chemical when it is analyzed by the Gas Chromatography/ Mass Spectrometer (GC/MS)?

it is broken into fragments which are each counted to create a graph

A mass spectrum of a chemical:

will be unique, unlike the mass spectrum of any other chemicals

How do CSIs ensure that evidence does not get tampered with?

anytime someone examines evidence, they must sign a chain of custody form

What is a positive control

a sample prepared by the toxicologist which has a specific chemical present

The ___ marks the bullet with the gun’s unique characteristics.

rifling

What is the calliber of this bullet

9mm

Where do investigators test fire a suspected gun in order to get individual characteristics of the gun

in a water tank

What equipment do investigators use to analyze striations on bullets

comparison microscope

A 9mm bullet was collected from the victim, and two firearms were found at the crime scene. Both gun 1 and gun 2 9mm bullets. How can the investigators determine which gun fired the bullet?

test fire the suspected guns and compare the bullet striations to the fatal bullet

Which of the following is not determined by a medical examiner

place of death

An internal autopsy always begins with a ___.

y incision

During an autopsy, the examiner sticks the syringe into ___ to collect a blood sample for further analysis

the heart

The term “rigor mortis” refers to:

the body’s muscles stiffening after death

Where does a medical examiner measure the body tempature of a dead person?

the liver

There are three important things a medical examiner looks for when determining the time of death. Which is NOT one of them?

Odor mortis

What causes fingerprints to be left behind when we touch things?

Natural sweats and oils in the skin

IAFIS is the FBI’s national fingerprint database. Criminologists often search the database for fingerprint matches. What does IAFIS stand for?

Integrated Automated Fingerprint Identification System

During fuming, the super glue heats up and attaches to _____ in the fingerprint.

Amino acids and oil

Evidence is usually placed in a superglue _____ when developing the fingerprints.

chamber

DNA (deoxyribonucleic acid) is the genetic material in our cells that controls what we inherit from our parents. Which of the following statements is true?

Except identical twins, no two individuals have the exact same DNA.

What system used by the FBI compiles DNA of known violent offenders from all over the nation and can be used to match DNA with a sample found at a crime scene?

CODIS

A woman gets out of bed, watches TV, talks on the phone, pets her cat, and then goes shopping. Which object would be most useful in collecting the woman’s DNA sample?

the phone

Decide the correctness of the following statement: You can alter your DNA so it will appear to be different.

false

A mitochondrion is the site of energy production and contains copies of mitochondrial DNA. Which one is it in the cell below?

Which of the following statements is true?

In a cell, there are much more copies of mitochondrial DNA than nuclear DNA.

Cathy and Ann

The cuticle is the outside covering of a hair, and it has three different scale patterns. Which of the following pictures shows the cuticle scale that is found in a human hair?

What must be present in a hair sample to test for nuclear DNA?

Follicular tag

John uses a microscope to exam hair samples from four different animals. Below is what he sees from each sample. Which one is most likely to be from a human?

There are various methods to document or preserve the bitemark on a victim. Which is NOT one of them?

The tissue and skin of the bite site is frozen for future comparisons.

The anterior teeth are the front-most teeth that usually produce a bitemark. What do the anterior teeth consist of?

Incisors and canine

Picture A below is likely to be a dog bite, and picture B is likely to be a human bite. Which statement is part of the reasoning for this judgment?

The bitemark in picture A is oval shaped, while the one in picture B is roughly circular.

When photographing a bitemark, what tool is commonly used to document the measurements of the bitemark?

An ABFO NO. 2 scale

CADB

Yes

What does “negative control” mean in this test?

It means a sample that purposely does not contain chemical A.

What should be used as a positive control?

chemical A

When is the victim’s sample taken for a toxicology screen?

At the morgue

A toxicologist is responsible for:

Testing blood and bodily fluids for poisoning

A medical examiner autopsy does NOT require_______________.

Permission from the next-of-kin

Which chemical can be used to detect blood, even if it’s been wiped from a surface?

luminol

Blunt force trauma refers to:

Fractures, broken bones and external bruising.

Identifying a specific person can best be achieved by____________.

Fingerprint analysis

A special type of microscope that allows two separate objects to be views simultaneously in the same ocular is known as a ____.

Comparison microscope

What causes fingerprints to be left behind when we touch things?

Natural sweats and oils in the skin

There are three main classes for fingerprints based upon their visual pattern. Which of the following is NOT one of them?

Spirals

How would this fingerprint be classified?

whorls

Fingerprints that you cannot see with the naked eye are called latent prints. Which of the following substances is often used to develop latent fingerprints?

Super- glue

DNA (deoxyribonucleic acid) is the genetic material in our cells that controls what we inherit from our parents. Which of the following statements is true?

Except identical twins, no two individuals have the exact same DNA.

What system used by the FBI compiles DNA of known violent offenders from all over the nation and can be used to match DNA with a sample found at a crime scene?

CODIS

A woman gets out of bed, watches TV, talks on the phone, pets her cat, and then goes shopping. Which object would be most useful in collecting the woman’s DNA sample?

the phone

Decide the correctness of the following statement: You can alter your DNA so it will appear to be different.

false

Which part in the cell below contains most of the DNA?

If we compare a boy’s DNA with his parent, what result will we find out?

50% of the child’s markers are identical to his mother.

Are these two DNA profiles a match?

A plastic shoe print occurs when a shoe sinks into a soft substance like mud. How would an investigator collect a plastic shoe print from the crime scene?

Use dental plaster to make a cast of the shoe print

CBDA

Class characteristics of a shoe print are marks that are a direct result of the manufacturing process of the shoes. Which of the following is not one of the class characteristics?

Random cut on the shoe’s sole

When doing shoe print comparison, investigators have to identify ________________ in order to decide if the shoe prints are a match.

the unique markings of the shoe

In facial reconstruction, which is one of the crucial factors when considering the tissue depth?

gender

Which statement is true about facial reconstruction?

Teamwork of artists and forensic scientists on reconstruction projects increases the success rate for identification.

Which lab equipment is usually used to analyze toolmark evidence?

comparison microscope

How do investigators know a suspected knife is the weapon that was used to kill the victim?

They take impressions from the wound and the knife toolmark and see if there is a match.

What is the first step in analyzing digital evidence from a computer?

Use imaging tools to create an exact duplicate of the hard drive.

Which of the following is what investigators would do when they examine a computer?

Discover and crack passwords to gain access to information.

Which of the following is considered part of the medical examiner’s job?

Documenting wounds on the body

match Jennys dental records with the teeth and jaw of the body. match Jenny’s dental records with the teeth and jaw of the body analyze the skeletal remains to decide the gender of the body

Which of the following findings from a fire scene suggests that the fire was arson?

Foreign ignitable liquids in burned material

After a fire the molten wires in electrical cords often assume the shape of beads. If the demarcation (Border) of such a bead is not sharp, it suggests that ____ has cause the fire

burning from the outside

After a fire, window glass often shows a complicated pattern of short cracks, which is called crazing. What causes crazing?

Rapid cooling of hot glass.

What technique would a forensic scientist use to confirm if an ignitable liquid was used to start a fire?

Gas chromatography

To confirm if somebody died from smoke inhalation during a fire, the amount of __________ in the blood is determined.

carboxyhemoglobin

Spectrophotometry is a method that is based on the ability of molecules to __________ light.

absorb

You are setting up a headspace gas chromatography analysis to determine the amount of ethanol in a sample. What would you choose as a positive control?

ethanol

Look at the gas chromatogram below. What do the different peaks represent?

Different chemicals in the sample

A suspect has been found to have amphetamines in his blood. What technique can be used to find out which specific amphetamine it is?

Gas chromatography/Mass spectrometry

The bloodstain shown in the picture below would be labeled as a ________ type blood stain.

passive

When analyzing impact type of bloodstains (blood spatter shapes), the direction in which the blood traveled can be determined by …

noticing which direction the pointed ends of the blood stains face

Based on the photograph below, where did the impact of the bullet that caused this blood spatter come from?

from the left

Passive bloodstains are usually _______ wide.

greater than 4mm

How many DNA markers do forensic biologists use to compare DNA samples?

The PCR (polymerase chain reaction) technique:

Makes millions of copies of the DNA markers

The four steps of DNA processing are:

Extract, Amplify, Separate, Analyze

What do forensic scientists compare to establish if two DNA profiles such as the ones below match?

the pattern of the peaks

What is the first step when extracting DNA from a blood sample?

break the blood cells apart to release the DNA

The picture below is a part of a real DNA profile, showing one marker. Why does this marker have two different peaks?

the person has different copies of the marker

Why do markers in a DNA profile, like the one show below with marker #13 highlighted, sometimes have only one peak?

The person inherited the same marker from BOTH parents.

In an external autopsy, a gunshot wound with abrasions and blackening can be classified as a __________ wound.

contact

hey gun was fired from an intermediate range (1cm to 4m)

Fingernail swabs collected during an autopsy are used to ___

extract DNA to identify potential suspects

In an external autopsy, a gunshot wound with abrasions and blackening can be classified as a __________ wound.

contact

A 9 mm bullet was collected from the victim. Both guns found at the crime scene use 9 mm bullets. How can the investigators determine which gun fired the bullet?

Compare the bullet striations from the crime scene guns to the bullet collected from the victim.

100

Rifling is one characteristic forensic scientists compare to see if two bullets come from the same gun. Conventional type rifling means the grooves on the surface of a bullet are _______

deep, easy to see