Question 1

Which scientists are credited for deducing the true structure of DNA?

Accepted Answer

A) Rosalind Franklin 
B) Martha Chase and Frederick Griffith 
C) James Watson and Francis Crick 
D) Rachel Carson and Oswald Avery 
A) Rosalind Franklin 
B) Martha Chase and Frederick Griffith 
C) James Watson and Francis Crick 
D) Rachel Carson and Oswald Avery C

Question 2

The enzyme that joins the ends of newly synthesized segments of DNA after the primers have been removed is:

Accepted Answer

A) DNA ligase 
B) DNA polymerase 
C) helicase 
D) primase 
E) RNA ligase 
A) DNA ligase 
B) DNA polymerase 
C) helicase 
D) primase 
E) RNA ligase A

Question 3

The Hershey-Chase experiment demonstrated that RNA,not protein,is the hereditary material.

Accepted Answer

A) True 
 B)False  False

Question 4

Based on which of the following pieces of evidence about the transforming agent did Avery conclude that DNA is the hereditary material?

Accepted Answer

A) The purified material had the same elements as DNA. 
B) In an ultracentrifuge,the material migrated like DNA. 
C) The material was not destroyed by protein-digesting enzymes. 
D) The material was destroyed by DNA-digesting enzymes. 
E) All of the choices are correct. 
A) The purified material had the same elements as DNA. 
B) In an ultracentrifuge,the material migrated like DNA. 
C) The material was not destroyed by protein-digesting enzymes. 
D) The material was destroyed by DNA-digesting enzymes. 
E) All of the choices are correct.

Question 5

Once a mistake is made in DNA it will stay there forever.

Accepted Answer

A) True 
 B)False

Question 6

When Frederick Griffith infected mice with S.pneumoniae that lacked a capsule,the mice:

Accepted Answer

A) remained healthy 
B) died of blood poisoning 
C) became ill but lived 
D) reproduced quicker 
A) remained healthy 
B) died of blood poisoning 
C) became ill but lived 
D) reproduced quicker

Question 7

Which London surgeon noted in 1775 that chimney sweeps exhibited frequent cancer of the scrotum?

Accepted Answer

A) Katsusaburo Yamagiwa 
B) John Hill 
C) Sir Percivall Pott 
D) Ernst Winder 
E) Richard Doll 
A) Katsusaburo Yamagiwa 
B) John Hill 
C) Sir Percivall Pott 
D) Ernst Winder 
E) Richard Doll

Question 8

In DNA,the amount of adenine always equals the amount of thymine,and the amount of guanine always equals the amount of cytosine.

Accepted Answer

A) True 
 B)False

Question 9

An unexpected change in a cell's genetic makeup is called a ____________.

Accepted Answer

The answer of An unexpected change in a cell's genetic...

Question 10

A plant species has its DNA analyzed.The results show that 28% of its nitrogen bases are guanine.What is the percent represented by thymine?

Accepted Answer

A) 28% 
B) 24% 
C) 23% 
D) 22% 
A) 28% 
B) 24% 
C) 23% 
D) 22%

Question 11

Which type of mutation will have the most evolutionary consequence?

Accepted Answer

A) A mutation in a lung cell 
B) A mutation in a kidney cell 
C) A mutation in a stomach cell 
D) A mutation in a germ-line cell 
A) A mutation in a lung cell 
B) A mutation in a kidney cell 
C) A mutation in a stomach cell 
D) A mutation in a germ-line cell

Question 12

All of the following are correct about mutations except:

Accepted Answer

A) Without mutations,there would be no variation and no evolution. 
B) Mutations change the bases in DNA. 
C) A mutation in a somatic cell will be passed on to subsequent generations. 
D) Some mutations change the nucleotide sequence of a gene. 
E) Some mutations remove nucleotides from a genE. 
A) Without mutations,there would be no variation and no evolution. 
B) Mutations change the bases in DNA. 
C) A mutation in a somatic cell will be passed on to subsequent generations. 
D) Some mutations change the nucleotide sequence of a gene. 
E) Some mutations remove nucleotides from a genE.

Question 13

What observation did Dr.Katsusaburo Yamagiwa make to lead him to believe that chemicals cause cancer?

Accepted Answer

A) He observed that chimney sweeps exhibited frequent cancer of the scrotum. 
B) He observed unusual tumors of the nose in snuff users and suggested tobacco as the cause. 
C) He observed that cancer rates were 40 times higher in smokers than in nonsmokers. 
D) He observed that when coal tar extracts were applied to rabbit skin,cancers eventually developeD. 
A) He observed that chimney sweeps exhibited frequent cancer of the scrotum. 
B) He observed unusual tumors of the nose in snuff users and suggested tobacco as the cause. 
C) He observed that cancer rates were 40 times higher in smokers than in nonsmokers. 
D) He observed that when coal tar extracts were applied to rabbit skin,cancers eventually developeD.

Question 14

The place where the parent DNA molecule becomes unzipped for replication is called the ___________________.

Accepted Answer

The answer of The place where the parent DNA molecule...

Question 15

The significance of the Griffith,Avery and Hershey-Chase experiments was that they demonstrated that:

Accepted Answer

A) genes were located on chromosomes 
B) enzymes transformed bacteria 
C) proteins were what genes were composed of 
D) DNA was the molecule of heredity 
A) genes were located on chromosomes 
B) enzymes transformed bacteria 
C) proteins were what genes were composed of 
D) DNA was the molecule of heredity

Question 16

A base substitution will lead to a frame-shift mutation.

Accepted Answer

A) True 
 B)False

Question 17

How many carbon atoms does deoxyribose have?

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
E) 8 
A) 4 
B) 5 
C) 6 
D) 7 
E) 8

Question 18

The copying of DNA before cell division is referred to as DNA ___________________.

Accepted Answer

replicatio

Question 19

The process when an individual gene moves from one place in the genome to another is called a:

Accepted Answer

A) transposition 
B) frame shift mutation 
C) transition 
D) base substitution 
E) base deletion 
A) transposition 
B) frame shift mutation 
C) transition 
D) base substitution 
E) base deletion

Question 20

Which choice describes how the DNA molecule replicates?

Accepted Answer

A) Semiconservative 
B) Dispersive 
C) Conservative 
D) Either dispersive or semiconservative depending on the pH 
E) Either dispersive or conservative depending on the organism 
A) Semiconservative 
B) Dispersive 
C) Conservative 
D) Either dispersive or semiconservative depending on the pH 
E) Either dispersive or conservative depending on the organism

Exam 11: DNA: the Genetic Material

Which scientists are credited for deducing the true structure of DNA?

The enzyme that joins the ends of newly synthesized segments of DNA after the primers have been removed is:

The Hershey-Chase experiment demonstrated that RNA,not protein,is the hereditary material.

Based on which of the following pieces of evidence about the transforming agent did Avery conclude that DNA is the hereditary material?

Once a mistake is made in DNA it will stay there forever.

When Frederick Griffith infected mice with S.pneumoniae that lacked a capsule,the mice:

Which London surgeon noted in 1775 that chimney sweeps exhibited frequent cancer of the scrotum?

In DNA,the amount of adenine always equals the amount of thymine,and the amount of guanine always equals the amount of cytosine.

An unexpected change in a cell's genetic makeup is called a ____________.

A plant species has its DNA analyzed.The results show that 28% of its nitrogen bases are guanine.What is the percent represented by thymine?

Which type of mutation will have the most evolutionary consequence?

All of the following are correct about mutations except:

What observation did Dr.Katsusaburo Yamagiwa make to lead him to believe that chemicals cause cancer?

The place where the parent DNA molecule becomes unzipped for replication is called the ___________________.

The significance of the Griffith,Avery and Hershey-Chase experiments was that they demonstrated that:

A base substitution will lead to a frame-shift mutation.

How many carbon atoms does deoxyribose have?

The copying of DNA before cell division is referred to as DNA ___________________.

The process when an individual gene moves from one place in the genome to another is called a:

Which choice describes how the DNA molecule replicates?

The Science of Biology

The Chemistry of Life

Molecules of Life

Cells

Energy and Life

Photosynthesis: Acquiring Energy From the Sun

How Cells Harvest Energy From Food

Mitosis

Meiosis

Foundations of Genetics

How Genes Work

Genomics and Biotechnology

Evolution and Natural Selection

How We Name Living Things

Prokaryotes: the First Single-Celled Creatures

Protists: Advent of the Eukaryotes

Fungi Invade the Land

Evolution of the Animal Phyla

History of the Vertebrates

How Humans Evolved

The Animal Body and How It Moves

Circulation

Respiration

The Path of Food Through the Animal Body

Maintaining the Internal Environment

How the Animal Body Defends Itself

The Nervous System

The Senses

Chemical Signaling Within the Animal Body

Reproduction and Development

Evolution of Plants

Plant Form and Function

Plant Reproduction and Growth

Populations and Communities

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Behavior and the Environment

Human Influences on the Living World

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