Question 1

Which of the following shows the steps of PCR amplification in the correct order?

Accepted Answer

A)  extract DNA, add nucleotides, heat, add polymerase, cool 
B)  extract DNA, add polymerase, cycles of heating and cooling, add nucleotides 
C)  extract DNA, add polymerase, heat, add nucleotides, cool 
D)  extract DNA, heat, add nucleotides, cool, add polymerase, repeat 
E)  extract DNA, add nucleotides and polymerase, cycles of heating and cooling 
A)  extract DNA, add nucleotides, heat, add polymerase, cool 
B)  extract DNA, add polymerase, cycles of heating and cooling, add nucleotides 
C)  extract DNA, add polymerase, heat, add nucleotides, cool 
D)  extract DNA, heat, add nucleotides, cool, add polymerase, repeat 
E)  extract DNA, add nucleotides and polymerase, cycles of heating and cooling

Question 2

How does complementary base pairing make DNA replication more efficient?

Accepted Answer

Complementary base pairing (A to T and G

Question 3

Which of the following statements is FALSE?

Accepted Answer

A)  You may have different numbers of copies of an STR on each member of a pair of chromosomes. 
B)  The greater the number of STRs analyzed, the smaller the field of individuals with identical numbers of STRs. 
C)  Females inherit STRs on their X chromosomes only from their mothers. 
D)  Males inherit STRs on the Y chromosome only from their fathers. 
E)  STR analysis can be used to determine paternity using DNA samples. 
A)  You may have different numbers of copies of an STR on each member of a pair of chromosomes. 
B)  The greater the number of STRs analyzed, the smaller the field of individuals with identical numbers of STRs. 
C)  Females inherit STRs on their X chromosomes only from their mothers. 
D)  Males inherit STRs on the Y chromosome only from their fathers. 
E)  STR analysis can be used to determine paternity using DNA samples.

Question 4

What is the complementary base-pairing rule?

Accepted Answer

A)  Adenine will always pair with guanine. 
B)  Guanine will always pair with thymine. 
C)  Adenine can pair with either guanine or thymine. 
D)  A nucleotide can base-pair to any other nucleotide using hydrogen bonds. 
E)  Adenine will always pair with thymine, and cytosine will always pair with guanine. 
A)  Adenine will always pair with guanine. 
B)  Guanine will always pair with thymine. 
C)  Adenine can pair with either guanine or thymine. 
D)  A nucleotide can base-pair to any other nucleotide using hydrogen bonds. 
E)  Adenine will always pair with thymine, and cytosine will always pair with guanine.

Question 5

Currently,15 STR sites are used to create a DNA profile.What are the implications for crime scene analysis if only four sites were used? What are the implications if 25 sites are used?

Accepted Answer

If only four sites are used,positive ide

Question 6

Currently,forensic scientists use ____ STRs found on ___ different chromosomes.

Accepted Answer

The answer of Currently,forensic scientists use ____ STRs found on...

Question 7

You start a PCR process with two copies of a DNA molecule.After three cycles of PCR,how many copies of the DNA will be present?

Accepted Answer

A)  5 
B)  6 
C)  8 
D)  16 
E)  27 
A)  5 
B)  6 
C)  8 
D)  16 
E)  27

Question 8

What is meant by "semiconservative" replication?

Accepted Answer

A)  As the new strands of DNA are formed, the old strands are broken down and recycled. 
B)  As the new strands of DNA are formed, one of the old strands is broken down and recycled while the other is used as a template for the creation of a new strand. 
C)  The original strands of DNA are used to make newer strands, resulting in two copies of the DNA, one made entirely of new DNA, the other entirely of old DNA. 
D)  As DNA replication occurs, two new strands of DNA are produced without use of the original strands. 
E)  Each newly replicated strand of DNA consists of one original strand and one newly formed strand. 
A)  As the new strands of DNA are formed, the old strands are broken down and recycled. 
B)  As the new strands of DNA are formed, one of the old strands is broken down and recycled while the other is used as a template for the creation of a new strand. 
C)  The original strands of DNA are used to make newer strands, resulting in two copies of the DNA, one made entirely of new DNA, the other entirely of old DNA. 
D)  As DNA replication occurs, two new strands of DNA are produced without use of the original strands. 
E)  Each newly replicated strand of DNA consists of one original strand and one newly formed strand.

Question 9

Sequential cycles of heating and DNA extension of primer-specific DNA regions is known as .........................................................

Accepted Answer

PCR,polyme

Question 10

To condense DNA into a smaller size,it is wrapped around _______ molecules.

Accepted Answer

The answer of To condense DNA into a smaller size,it...

Question 11

Before DNA can be duplicated,it must be ________ so that DNA polymerase can access the DNA strands.

Accepted Answer

unwound fr

Question 12

Why can DNA extraction be a very painstaking process for forensic scientists?

Accepted Answer

A)  It can be difficult to obtain enough cells in a sample to yield enough DNA. 
B)  Samples can become contaminated with foreign DNA from improper handling. 
C)  Samples stored improperly can degrade too much to be used. 
D)  Samples from the crime scene may contain DNA from multiple individuals. 
E)  All of the above 
A)  It can be difficult to obtain enough cells in a sample to yield enough DNA. 
B)  Samples can become contaminated with foreign DNA from improper handling. 
C)  Samples stored improperly can degrade too much to be used. 
D)  Samples from the crime scene may contain DNA from multiple individuals. 
E)  All of the above

Question 13

Forensic scientists create DNA profiles using non-coding DNA sequences known as _________.

Accepted Answer

STRs OR sh

Question 14

Explain how DNA samples are isolated from a crime scene.

Accepted Answer

Investigators must carefully identify po

Question 15

A boy's Y chromosome will generally NOT be identical to that of his

Accepted Answer

A)  father. 
B)  grandfather on father's side of family. 
C)  great-grandfather on mother's side of family. 
D)  brothers. 
E)  All of the above. 
A)  father. 
B)  grandfather on father's side of family. 
C)  great-grandfather on mother's side of family. 
D)  brothers. 
E)  All of the above.

Question 16

What are short tandem repeats (STRs)?

Accepted Answer

A)  Blocks of repeated RNA sequences (AGCT) found at points along our chromosomes 
B)  Blocks of repeated DNA sequences (AGCT) that are highly similar from person to person 
C)  Blocks of repeated DNA sequences (AGCT) that vary in length from person to person 
D)  Sequences of non-repeated DNA that are consistent from person to person 
E)  Sequences of non-repeated DNA that are highly variable from person to person 
A)  Blocks of repeated RNA sequences (AGCT) found at points along our chromosomes 
B)  Blocks of repeated DNA sequences (AGCT) that are highly similar from person to person 
C)  Blocks of repeated DNA sequences (AGCT) that vary in length from person to person 
D)  Sequences of non-repeated DNA that are consistent from person to person 
E)  Sequences of non-repeated DNA that are highly variable from person to person

Question 17

DNA profiling is used to identify

Accepted Answer

A)  genes. 
B)  a person. 
C)  chromosome mutations. 
D)  protein mutations. 
E)  time of a crime. 
A)  genes. 
B)  a person. 
C)  chromosome mutations. 
D)  protein mutations. 
E)  time of a crime.

Question 18

Based on the data below showing a limited number of STRs,discuss the parentage of this child.

Accepted Answer

For STRs 1,2,and 3,each of the listed pa

Question 19

STRs are

Accepted Answer

A)  pieces of DNA of the same length scattered throughout the genome. 
B)  repeated different numbers of times in different individuals. 
C)  DNA sequences inherited from only one parent. 
D)  identical on both members of a chromosome pair. 
E)  always identical in fraternal twins. 
A)  pieces of DNA of the same length scattered throughout the genome. 
B)  repeated different numbers of times in different individuals. 
C)  DNA sequences inherited from only one parent. 
D)  identical on both members of a chromosome pair. 
E)  always identical in fraternal twins.

Question 20

Which is the best description of how nucleotides are attached to make DNA? Nucleotides are attached to each other ________.

Accepted Answer

A)  phosphate to phosphate 
B)  sugar to sugar 
C)  phosphate to sugar 
D)  base to base 
E)  base to phosphate 
A)  phosphate to phosphate 
B)  sugar to sugar 
C)  phosphate to sugar 
D)  base to base 
E)  base to phosphate

Exam 7: DNA Structure and Replication Biologically Unique

Which of the following shows the steps of PCR amplification in the correct order?

How does complementary base pairing make DNA replication more efficient?

Which of the following statements is FALSE?

What is the complementary base-pairing rule?

Currently,15 STR sites are used to create a DNA profile.What are the implications for crime scene analysis if only four sites were used? What are the implications if 25 sites are used?

Currently,forensic scientists use ____ STRs found on ___ different chromosomes.

You start a PCR process with two copies of a DNA molecule.After three cycles of PCR,how many copies of the DNA will be present?

What is meant by "semiconservative" replication?

Sequential cycles of heating and DNA extension of primer-specific DNA regions is known as .........................................................

To condense DNA into a smaller size,it is wrapped around _______ molecules.

Before DNA can be duplicated,it must be ________ so that DNA polymerase can access the DNA strands.

Why can DNA extraction be a very painstaking process for forensic scientists?

Forensic scientists create DNA profiles using non-coding DNA sequences known as _________.

Explain how DNA samples are isolated from a crime scene.

A boy's Y chromosome will generally NOT be identical to that of his

What are short tandem repeats (STRs)?

DNA profiling is used to identify

Based on the data below showing a limited number of STRs,discuss the parentage of this child.

STRs are

Which is the best description of how nucleotides are attached to make DNA? Nucleotides are attached to each other ________.

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

Filters

Currently,forensic scientists use __ STRs found on _ different chromosomes.