Question 1

The width (diameter)of the DNA helix normally varies a lot,depending on which bases are paired together at that location.

Accepted Answer

A) True 
 B)False

Question 2

What is the correct sequence in creating a DNA profile?

Accepted Answer

A)  Collect sample->extract DNA->PCR to amplify STRs->gel electrophoresis->analyze gel 
B)  Collect sample->extract DNA-> gel electrophoresis->PCR to amplify STRs-> analyze gel 
C)  Collect sample->gel electrophoresis->extract DNA->PCR to amplify STRs->gel electrophoresis again->analyze gel 
D)  Collect sample->PCR to amplify sample->gel electrophoresis->extract DNA->gel electrophoresis again->analyze gel 
E)  PCR to amplify sample->extract DNA->gel electrophoresis->analyze gel 
A)  Collect sample->extract DNA->PCR to amplify STRs->gel electrophoresis->analyze gel 
B)  Collect sample->extract DNA-> gel electrophoresis->PCR to amplify STRs-> analyze gel 
C)  Collect sample->gel electrophoresis->extract DNA->PCR to amplify STRs->gel electrophoresis again->analyze gel 
D)  Collect sample->PCR to amplify sample->gel electrophoresis->extract DNA->gel electrophoresis again->analyze gel 
E)  PCR to amplify sample->extract DNA->gel electrophoresis->analyze gel

Question 3

Some highly degraded DNA was collected from a crime scene.Upon analysis,forensic scientists were only able to accurately sequence one 450-nucleotide-long segment of DNA from a Y chromosome.There are five suspects in the case,but they have fled the state.However,they all have large extended families in the area.How can the police narrow the search to just one suspect?

Accepted Answer

Analyze the DNA of male siblin

Question 4

When creating a DNA profile,why are STRs used?

Accepted Answer

STRs are highly variable,and a

Question 5

PCR of a single STR can produce _____ on a gel.

Accepted Answer

A)  one thick band 
B)  one thin band 
C)  two thin bands 
D)  two thick bands 
E)  one thick or two thin bands 
A)  one thick band 
B)  one thin band 
C)  two thin bands 
D)  two thick bands 
E)  one thick or two thin bands

Question 6

Humans inherit chromosomes from each parent; and a male inherits the chromosome from his father.

Accepted Answer

The answer of Humans inherit chromosomes from each parent; and...

Question 7

Which of the following statements does NOT accurately describe human DNA?

Accepted Answer

A)  Human DNA is a unique combination of DNA inherited from both parents. 
B)  Males receive one X chromosome from their mother. 
C)  Females receive two X chromosomes from their mother. 
D)  Humans have 22 pairs of chromosomes and two gender chromosomes. 
E)  Human DNA is located within the nucleus. 
A)  Human DNA is a unique combination of DNA inherited from both parents. 
B)  Males receive one X chromosome from their mother. 
C)  Females receive two X chromosomes from their mother. 
D)  Humans have 22 pairs of chromosomes and two gender chromosomes. 
E)  Human DNA is located within the nucleus.

Question 8

Which of the following is an STR?

Accepted Answer

A)  AGATAGATAGAT 
B)  AGATTAGAAGAT 
C)  AGATCAGATAGA 
D)  AGAUAGAUAGAU 
E)  Serine-lysine-serine-lysine 
A)  AGATAGATAGAT 
B)  AGATTAGAAGAT 
C)  AGATCAGATAGA 
D)  AGAUAGAUAGAU 
E)  Serine-lysine-serine-lysine

Question 9

You are analyzing DNA from a crime scene,but you have a very limited budget.Instead of looking at the 15 STR sites generally used to create a DNA profile,you decide to only look at eight STR sites.There are only two possible suspects in the crime,and they are brothers.Do you think the eight STR sites you examine will be adequate to make a positive identification to determine which brother committed the crime? Why or why not?

Accepted Answer

Because the suspects are brothers,they h

Question 10

Explain how DNA is organized.Why is it necessary for DNA to be organized in this way?

Accepted Answer

DNA is organized into structures called

Question 11

Explain which parent determines the gender of a child.

Accepted Answer

Females have two X chromosomes,so they a

Question 12

How is DNA analyzed for the purposes of forensic evidence?

Accepted Answer

A)  DNA is analyzed for the presence of nucleotide bases. 
B)  Fragments of DNA are run on a gel to separate them by size and form a pattern. 
C)  DNA is analyzed quickly, within a certain time frame, because it degrades over time. 
D)  A technique called STR is used to amplify small fragments of DNA. 
E)  Regions of DNA from the suspect are amplified and compared to crime scene DNA. 
A)  DNA is analyzed for the presence of nucleotide bases. 
B)  Fragments of DNA are run on a gel to separate them by size and form a pattern. 
C)  DNA is analyzed quickly, within a certain time frame, because it degrades over time. 
D)  A technique called STR is used to amplify small fragments of DNA. 
E)  Regions of DNA from the suspect are amplified and compared to crime scene DNA.

Question 13

DNA replication occurs

Accepted Answer

A)  in the Golgi. 
B)  in the cytoplasm. 
C)  in the nucleus. 
D)  in lysosomes. 
E)  in vesicles. 
A)  in the Golgi. 
B)  in the cytoplasm. 
C)  in the nucleus. 
D)  in lysosomes. 
E)  in vesicles.

Question 14

Identical chromosomal DNA sequences would most likely be found between an individual and his/her

Accepted Answer

A)  mother. 
B)  sibling. 
C)  step-brother. 
D)  identical twin. 
E)  fraternal twin. 
A)  mother. 
B)  sibling. 
C)  step-brother. 
D)  identical twin. 
E)  fraternal twin.

Question 15

Whose DNA will be most similar to Bob's? Arrange them in order,from most similar to least similar: mother,sibling,grandfather,identical twin.

Accepted Answer

A)  identical twin, mother, sibling, grandfather 
B)  grandfather, sibling, mother, identical twin 
C)  mother, sibling, identical twin, grandfather 
D)  identical twin, sibling, grandfather, mother 
E)  none of the above 
A)  identical twin, mother, sibling, grandfather 
B)  grandfather, sibling, mother, identical twin 
C)  mother, sibling, identical twin, grandfather 
D)  identical twin, sibling, grandfather, mother 
E)  none of the above

Question 16

The only person(s)with DNA that exactly matches your DNA would be _______.

Accepted Answer

a sibling that resul

Question 17

You are analyzing DNA from a crime scene,but you have a very limited budget.Instead of looking at the 15 STR sites generally used to create a DNA profile,you decide to only look at eight STR sites.There are only two possible suspects in the crime,and they are brothers.Do you think the eight STR sites you examine will be adequate to make a positive identification to determine which brother committed the crime?

Accepted Answer

A)  Yes, because five or more sites are enough to identify most individuals. 
B)  Yes, because siblings only share seven or eight sites, so eight STRs will be enough. 
C)  No, because siblings have more similar DNA profiles than unrelated people. 
D)  No, because siblings will have identical DNA profiles, even with 15 STRs. 
E)  STRs cannot be used to distinguish between siblings. 
A)  Yes, because five or more sites are enough to identify most individuals. 
B)  Yes, because siblings only share seven or eight sites, so eight STRs will be enough. 
C)  No, because siblings have more similar DNA profiles than unrelated people. 
D)  No, because siblings will have identical DNA profiles, even with 15 STRs. 
E)  STRs cannot be used to distinguish between siblings.

Question 18

You have the following dataset and you are trying determine paternity between two potential fathers.How do these data reflect the need for multiple STRs for proper analysis?

Accepted Answer

Much of the data are inconclusive,elimin

Question 19

PCR stands for

Accepted Answer

A)  polymers confer reactants. 
B)  polymerase chain reaction. 
C)  polymerase cell reproduction. 
D)  potential chain reaction. 
E)  polynucleotide cycling reaction. 
A)  polymers confer reactants. 
B)  polymerase chain reaction. 
C)  polymerase cell reproduction. 
D)  potential chain reaction. 
E)  polynucleotide cycling reaction.

Question 20

A science museum hires an interior designer to create a spiral staircase that will represent DNA.The model must be as accurate as possible,but also allow people to climb.You are asked to evaluate the model for scientific accuracy.Which of the following design suggestions would you accept?

Accepted Answer

A)  The steps in the staircase are painted to look like phosphates and sugars. 
B)  People climbing the stairs will hold onto handrails made of sugars. 
C)  A support post runs down the very center, representing a string of phosphates. 
D)  People climbing the staircase will step on pairs of bases. 
E)  All of the above. 
A)  The steps in the staircase are painted to look like phosphates and sugars. 
B)  People climbing the stairs will hold onto handrails made of sugars. 
C)  A support post runs down the very center, representing a string of phosphates. 
D)  People climbing the staircase will step on pairs of bases. 
E)  All of the above.

Exam 7: DNA Structure and Replication Biologically Unique

The width (diameter)of the DNA helix normally varies a lot,depending on which bases are paired together at that location.

What is the correct sequence in creating a DNA profile?

When creating a DNA profile,why are STRs used?

PCR of a single STR can produce _____ on a gel.

Humans inherit chromosomes from each parent; and a male inherits the chromosome from his father.

Which of the following statements does NOT accurately describe human DNA?

Which of the following is an STR?

Explain how DNA is organized.Why is it necessary for DNA to be organized in this way?

Explain which parent determines the gender of a child.

How is DNA analyzed for the purposes of forensic evidence?

DNA replication occurs

Identical chromosomal DNA sequences would most likely be found between an individual and his/her

Whose DNA will be most similar to Bob's? Arrange them in order,from most similar to least similar: mother,sibling,grandfather,identical twin.

The only person(s)with DNA that exactly matches your DNA would be _______.

You have the following dataset and you are trying determine paternity between two potential fathers.How do these data reflect the need for multiple STRs for proper analysis?

PCR stands for

A science museum hires an interior designer to create a spiral staircase that will represent DNA.The model must be as accurate as possible,but also allow people to climb.You are asked to evaluate the model for scientific accuracy.Which of the following design suggestions would you accept?

The Process of Science Java Report

Chemistry and Molecules of Life Mission to Mars

Cell Function and Structure Wonder Drug

Nutrition,metabolism,enzymes the Peanut Butter Project

Energy Flow and Photosynthesis the Future of Fuel

Dietary Energy and Cellular Respiration Supersize Me

Genes to Proteins Medicine From Milk

Cell Division and Mitosis Natures Pharmacy

Mutations and Cancer Fighting Fate

Single-Gene Inheritance and Meiosis Rock for a Cause

Complex Inheritance Qa: Genetics

Stem Cells and Cell Differentiation Grow Your Own

Natural Selection and Adaptation Bugs That Resist Drugs

A: Nonadaptive Evolution and Speciation Urban Evolution

B: Nonadaptive Evolution and Speciation Urban Evolution

Evidence for Evolution a Fish With Fingers

Life on Earth Qa: Evolution

Prokaryotic Diversity Lost City

A: Eukaryotic Diversity Rain Forest Riches

B: Eukaryotic Diversity Rain Forest Riches

Human Evolution Skin Deep

A: Population Ecology on the Tracks of Wolves and Moose

B: Population Ecology on the Tracks of Wolves and Moose

A: Community Ecology Whats Happening to Honey Bees

B: Community Ecology Whats Happening to Honey Bees

A: Ecosystem Ecology the Heat Is on

B: Ecosystem Ecology the Heat Is on

A: Sustainability the Makings of a Green City

B: Sustainability the Makings of a Green City

A: Overview of Physiology Man Versus Mountain

B: Overview of Physiology Man Versus Mountain

Digestive System Drastic Measures

A: Cardiovascular System Death in Bogalusa

B: Cardiovascular System Death in Bogalusa

Respiratory System Peak Performance

A: Central Nervous System Smoke on the Brain

B: Central Nervous System Smoke on the Brain

Reproductive System Too Many Multiples

Immune System Viral Mysteries

A: Plant Physiology

B: Plant Physiology

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