Question 1

Describe the process of DNA replication.What is the importance of DNA replication?

Accepted Answer

Answer (should include points such as):
DNA replication begins with the unwinding of the DNA strands in the double helix.Each strand is then exposed to a collection of free nucleotides.The double helix is re-created as the nucleotides are assembled in the proper order (A with T and G with C).The result is the emergence of two identical copies of DNA.DNA replication allows a cell to pass on its genetic identity when it divides.

Question 2

Which of the following depicts correct base-pairing in DNA?

Accepted Answer

A)  A-U 
B)  G-A 
C)  T-A 
D)  C-T 
A)  A-U 
B)  G-A 
C)  T-A 
D)  C-T C

Question 3

A typical STR DNA type emanating from a single individual shows a ________ band pattern.

Accepted Answer

A)  One 
B)  Two 
C)  Three 
D)  Zero 
A)  One 
B)  Two 
C)  Three 
D)  Zero B

Question 4

Which statement about tandem repeats is NOT true?

Accepted Answer

A)  More than 30% of the human genome is composed of these repeating units. 
B)  Their origin is a mystery. 
C)  It is thought that they may act as spacers between the coded regions of DNA. 
D)  They are of no forensic interest. 
A)  More than 30% of the human genome is composed of these repeating units. 
B)  Their origin is a mystery. 
C)  It is thought that they may act as spacers between the coded regions of DNA. 
D)  They are of no forensic interest.

Question 5

Which statement is not correct for Y-STRs?

Accepted Answer

A)  Female STRs will not yield a Y-STR profile. 
B)  Y-STRs can be amplified by PCR. 
C)  Y-STR types are typically shorter in length as compared to X-STRs. 
D)  A typical Y-STR pattern has one band. 
A)  Female STRs will not yield a Y-STR profile. 
B)  Y-STRs can be amplified by PCR. 
C)  Y-STR types are typically shorter in length as compared to X-STRs. 
D)  A typical Y-STR pattern has one band.

Question 6

________ is the process of joining two complementary strands of DNA to form a double-stranded molecule.

Accepted Answer

The answer of ________ is the process of joining two...

Question 7

Which statement is NOT true? Few forensic labs do analysis of mtDNA because:

Accepted Answer

A)  Little mtDNA is present in a cell. 
B)  The analysis procedure is very rigorous. 
C)  It costs much more than nuclear DNA profiling. 
D)  Such study takes a long time. 
A)  Little mtDNA is present in a cell. 
B)  The analysis procedure is very rigorous. 
C)  It costs much more than nuclear DNA profiling. 
D)  Such study takes a long time.

Question 8

The Y-STR gene can reveal the sex of the person who contributed a DNA sample.

Accepted Answer

A) True 
 B)False

Question 9

Which is an advantage of working with short DNA fragments?

Accepted Answer

A)  They are more stable and less likely to break apart. 
B)  Their quantity can be greatly amplified by PCR technology. 
C)  They are less subject to degradation due to adverse environmental conditions. 
D)  All of the above 
A)  They are more stable and less likely to break apart. 
B)  Their quantity can be greatly amplified by PCR technology. 
C)  They are less subject to degradation due to adverse environmental conditions. 
D)  All of the above

Question 10

The separation of STRs using capillary electrophoresis:

Accepted Answer

A)  Evolved from the flat-gel electrophoresis approach. 
B)  Decreases analysis time. 
C)  Is currently the preferred method. 
D)  All of the above 
A)  Evolved from the flat-gel electrophoresis approach. 
B)  Decreases analysis time. 
C)  Is currently the preferred method. 
D)  All of the above

Question 11

________ region(s)of mitochondrial DNA have been found to be highly variable in the human population for forensic determinations.

Accepted Answer

A)  One 
B)  Two 
C)  Three 
D)  Four 
A)  One 
B)  Two 
C)  Three 
D)  Four

Question 12

The technology of DNA typing had its beginnings in 1985 with the work of:

Accepted Answer

A)  Henry Lee. 
B)  Francis Crick. 
C)  James Watson. 
D)  Alec Jeffreys. 
A)  Henry Lee. 
B)  Francis Crick. 
C)  James Watson. 
D)  Alec Jeffreys.

Question 13

How should blood-containing clothes from a victim be packaged?

Accepted Answer

A)  In an airtight metal container 
B)  In an airtight clear plastic container 
C)  In a metal paint can 
D)  In breathable paper after blood has dried 
A)  In an airtight metal container 
B)  In an airtight clear plastic container 
C)  In a metal paint can 
D)  In breathable paper after blood has dried

Question 14

________ is the molecule that carries the body's genetic information.

Accepted Answer

The answer of ________ is the molecule that carries the...

Question 15

________ repeats are regions of a chromosome that contain multiple copies of a core DNA sequence arranged in a repeating fashion.

Accepted Answer

The answer of ________ repeats are regions of a chromosome...

Question 16

A ________ is a threadlike structure in the cell nucleus along which the genes are located.

Accepted Answer

The answer of A ________ is a threadlike structure in...

Question 17

PCR is a technique that:

Accepted Answer

A)  Provides a statistical analysis of the nitrogenous-base pairings. 
B)  Can produce many exact copies of segments of DNA. 
C)  Produces information regarding the sequence of nitrogenous bases. 
D)  Virtually eliminates operator error from DNA analysis. 
A)  Provides a statistical analysis of the nitrogenous-base pairings. 
B)  Can produce many exact copies of segments of DNA. 
C)  Produces information regarding the sequence of nitrogenous bases. 
D)  Virtually eliminates operator error from DNA analysis.

Question 18

The individuality of an organism is determined by the organism's:

Accepted Answer

A)  DNA nucleotide sequence. 
B)  Nitrogenous bases. 
C)  Amino acids. 
D)  Environment. 
A)  DNA nucleotide sequence. 
B)  Nitrogenous bases. 
C)  Amino acids. 
D)  Environment.

Question 19

Which of the following statements about mitochondrial DNA is incorrect?

Accepted Answer

A)  Mitochondrial DNA is located outside the cell's nucleus. 
B)  Mitochondrial DNA is constructed in a loop configuration. 
C)  Many copies of mitochondrial DNA's hypervariable regions are made by PCR. 
D)  The number of repeat segments found in the hypervariable regions are used to type mitochondrialnDNA. 
A)  Mitochondrial DNA is located outside the cell's nucleus. 
B)  Mitochondrial DNA is constructed in a loop configuration. 
C)  Many copies of mitochondrial DNA's hypervariable regions are made by PCR. 
D)  The number of repeat segments found in the hypervariable regions are used to type mitochondrialnDNA.

Question 20

The molecular structure of DNA was deduced by:

Accepted Answer

A)  Gregor Mendel. 
B)  Francis Crick. 
C)  James Watson. 
D)  Both B and C 
A)  Gregor Mendel. 
B)  Francis Crick. 
C)  James Watson. 
D)  Both B and C

Describe the process of DNA replication.What is the importance of DNA replication?

Which of the following depicts correct base-pairing in DNA?

A typical STR DNA type emanating from a single individual shows a ________ band pattern.

Which statement about tandem repeats is NOT true?

Which statement is not correct for Y-STRs?

________ is the process of joining two complementary strands of DNA to form a double-stranded molecule.

Which statement is NOT true? Few forensic labs do analysis of mtDNA because:

The Y-STR gene can reveal the sex of the person who contributed a DNA sample.

Which is an advantage of working with short DNA fragments?

The separation of STRs using capillary electrophoresis:

________ region(s)of mitochondrial DNA have been found to be highly variable in the human population for forensic determinations.

The technology of DNA typing had its beginnings in 1985 with the work of:

How should blood-containing clothes from a victim be packaged?

________ is the molecule that carries the body's genetic information.

________ repeats are regions of a chromosome that contain multiple copies of a core DNA sequence arranged in a repeating fashion.

A ________ is a threadlike structure in the cell nucleus along which the genes are located.

PCR is a technique that:

The individuality of an organism is determined by the organism's:

Which of the following statements about mitochondrial DNA is incorrect?

The molecular structure of DNA was deduced by:

Introduction

The Crime Scene

Physical Evidence

Crime Scene Reconstruction: Blood Stain Pattern Analysis

Death Investigation

Fingerprints

Forensic Biometrics

The Microscope

Firearms, tool Marks, and Other Impressions

Matter, light, and Glass Examination

Hairs and Fibers

Drugs

Forensic Toxicology

Metals, paint, and Soil

Forensic Serology

Forensic Aspects of Fire and Explosion Investigation

Document Examination

Computer Forensics

Mobile Device Forensics

Filters

Exam 16: DNA: the Indispensable Forensic Science Tool

Describe the process of DNA replication.What is the importance of DNA replication?

Which of the following depicts correct base-pairing in DNA?

A typical STR DNA type emanating from a single individual shows a ________ band pattern.

Which statement about tandem repeats is NOT true?

Which statement is not correct for Y-STRs?

________ is the process of joining two complementary strands of DNA to form a double-stranded molecule.

Which statement is NOT true? Few forensic labs do analysis of mtDNA because:

The Y-STR gene can reveal the sex of the person who contributed a DNA sample.

Which is an advantage of working with short DNA fragments?

The separation of STRs using capillary electrophoresis:

________ region(s)of mitochondrial DNA have been found to be highly variable in the human population for forensic determinations.

The technology of DNA typing had its beginnings in 1985 with the work of:

How should blood-containing clothes from a victim be packaged?

________ is the molecule that carries the body's genetic information.

________ repeats are regions of a chromosome that contain multiple copies of a core DNA sequence arranged in a repeating fashion.

A ________ is a threadlike structure in the cell nucleus along which the genes are located.

PCR is a technique that:

The individuality of an organism is determined by the organism's:

Which of the following statements about mitochondrial DNA is incorrect?

The molecular structure of DNA was deduced by:

Introduction

The Crime Scene

Physical Evidence

Crime Scene Reconstruction: Blood Stain Pattern Analysis

Death Investigation

Fingerprints

Forensic Biometrics

The Microscope

Firearms, tool Marks, and Other Impressions

Matter, light, and Glass Examination

Hairs and Fibers

Drugs

Forensic Toxicology

Metals, paint, and Soil

Forensic Serology

Forensic Aspects of Fire and Explosion Investigation

Document Examination

Computer Forensics

Mobile Device Forensics

Filters