Question 1

Explain why proteins were initially hypothesized to be the genetic material instead of DNA.

Accepted Answer

Genes were known to control the synthesi

Question 2

_____ bonds link the sugar and phosphate groups in the backbone of DNA molecules.

Accepted Answer

A)  Covalent phosphodiester 
B)  Hydrogen 
C)  Weak 
D)  Ionic 
E)  Weak covalent 
A)  Covalent phosphodiester 
B)  Hydrogen 
C)  Weak 
D)  Ionic 
E)  Weak covalent

Question 3

Match between columns
                        Premises: prevents the hydrolysis of single DNA strands by nucleases

Accepted Answer

The Answer of DNA primase and Topoisomerase and Single-strand binding is...

Question 4

Replication typically occurs at a single origin of replication in eukaryotic chromosomes.

Accepted Answer

A) True 
 B)False

Question 5

The two strands of a DNA double helix can be described as running parallel to each other.

Accepted Answer

A) True 
 B)False

Question 6

Match between columns
                        Premises: catalyzes a reaction that occurs in the lagging strand but not in the leading strand

Accepted Answer

The Answer of DNA primase and Single-strand binding protein and is...

Question 7

Match between columns
                        Premises: grew bacteria in the presence of heavy nitrogen (15N), followed by growth in 14N medium for one or two generations, then measured the density of the DNA

Accepted Answer

The Answer of Chargaff and Griffith and Hershey and Chase is...

Question 8

X-ray diffraction studies are used to determine the

Accepted Answer

A)  sequence of amino acids in protein molecules. 
B)  sequence of nucleotides in nucleic acid molecules. 
C)  distances between atoms of molecules. 
D)  identity of an unknown chemical. 
E)  wavelength of X-rays. 
A)  sequence of amino acids in protein molecules. 
B)  sequence of nucleotides in nucleic acid molecules. 
C)  distances between atoms of molecules. 
D)  identity of an unknown chemical. 
E)  wavelength of X-rays.

Question 9

Okazaki fragments are complementary to the leading strand of DNA.

Accepted Answer

A) True 
 B)False

Question 10

Briefly explain why apoptosis protects the body against cancerous cells. Include why cell age is a factor in cells becoming cancerous.

Accepted Answer

Apoptosis, or programmed cell death, rid

Question 11

Match between columns
                        Premises: catalyzes formation of sugar-phosphate bonds in adjacent Okazaki fragments

Accepted Answer

The Answer of DNA helicase and DNA ligase and Topoisomerase is...

Question 12

How many different kinds of amino acids are known?

Accepted Answer

A)  Less than 5 
B)  More than 5 but not more than 8 
C)  More than 8 but not more than 15 
D)  More than 70 
E)  More than 20 
A)  Less than 5 
B)  More than 5 but not more than 8 
C)  More than 8 but not more than 15 
D)  More than 70 
E)  More than 20

Question 13

Alfred Hershey's and Martha Chase's experiments with bacteriophages showed that

Accepted Answer

A)  DNA was injected into bacteria. 
B)  DNA and protein were injected into bacteria. 
C)  DNA remained on the outer coat of bacteria. 
D)  proteins were injected into bacteria. 
E)  proteins were responsible for the production of new viruses within the bacteria. 
A)  DNA was injected into bacteria. 
B)  DNA and protein were injected into bacteria. 
C)  DNA remained on the outer coat of bacteria. 
D)  proteins were injected into bacteria. 
E)  proteins were responsible for the production of new viruses within the bacteria.

Question 14

Match between columns
                        Premises: binds DNA at the origin of replication and breaks the hydrogen bonds between the paired bases

Accepted Answer

The Answer of DNA helicase and Single-strand binding protein and is...

Question 15

List the steps and components involved in the process of nucleotide excision repair.

Accepted Answer

The process of nucle

Question 16

What are the small circular DNA molecules that carry genes separate from those on a bacterial chromosome?

Accepted Answer

A)  Plasmids 
B)  Telomerase 
C)  Helicase 
D)  DNA ligase 
E)  Apoptosis 
A)  Plasmids 
B)  Telomerase 
C)  Helicase 
D)  DNA ligase 
E)  Apoptosis

Question 17

If DNA replication rejoined the two parental strands, it would be described as

Accepted Answer

A)  dispersive. 
B)  gradient. 
C)  semiconservative. 
D)  parental. 
E)  conservative. 
A)  dispersive. 
B)  gradient. 
C)  semiconservative. 
D)  parental. 
E)  conservative.

Question 18

Match between columns
                        Premises: adds nucleotides only to the 3¢ end of an existing polynucleotide strand

Accepted Answer

The Answer of DNA polymerase and Topoisomerase and DNA ligase is...

Question 19

Match between columns
                        Premises: discovered that DNA was responsible for bacterial transformation

Accepted Answer

The Answer of Meselson and Stahl and Avery and Griffith is...

Question 20

The two molecules that alternate to form the backbone of a polynucleotide chain are

Accepted Answer

A)  adenine and thymine. 
B)  cytosine and guanine. 
C)  sugar and phosphate. 
D)  base and sugar. 
E)  base and phosphate. 
A)  adenine and thymine. 
B)  cytosine and guanine. 
C)  sugar and phosphate. 
D)  base and sugar. 
E)  base and phosphate.

Exam 12: DNA: The Carrier of Genetic Information

Explain why proteins were initially hypothesized to be the genetic material instead of DNA.

_____ bonds link the sugar and phosphate groups in the backbone of DNA molecules.

Replication typically occurs at a single origin of replication in eukaryotic chromosomes.

The two strands of a DNA double helix can be described as running parallel to each other.

X-ray diffraction studies are used to determine the

Okazaki fragments are complementary to the leading strand of DNA.

Briefly explain why apoptosis protects the body against cancerous cells. Include why cell age is a factor in cells becoming cancerous.

How many different kinds of amino acids are known?

Alfred Hershey's and Martha Chase's experiments with bacteriophages showed that

List the steps and components involved in the process of nucleotide excision repair.

What are the small circular DNA molecules that carry genes separate from those on a bacterial chromosome?

If DNA replication rejoined the two parental strands, it would be described as

The two molecules that alternate to form the backbone of a polynucleotide chain are

A View of Life

Atoms and Molecules: the Chemical Basis of Life

The Chemistry of Life: Organic Compounds

Organization of the Cell

Biological Membranes

Cell Communication

Energy and Metabolism

How Cells Make Atp: Energy-Releasing Pathways

Photosynthesis: Capturing Light Energy

Chromosomes, Mitosis, and Meiosis

The Basic Principles of Heredity

Gene Expression

Gene Regulation

DNA Technology and Genomics

Human Genetics and the Human Genome

Developmental Genetics

Introduction to Darwinian Evolution

Evolutionary Change in Populations

Speciation and Macroevolution

The Origin and Evolutionary History of Life

The Evolution of Primates

Understanding Diversity: Systematics

Viruses and Subviral Agents

Bacteria and Archaea

Protists

Seedless Plants

Seed Plants

The Fungi

An Introduction to Animal Diversity

Sponges, Cnidarians, Ctenophores, and Protostomes

The Deuterostomes

Plant Structure, Growth, and Development

Leaf Structure and Function

Stem Structure and Transport

Roots and Mineral Nutrition

Reproduction in Flowering Plants

Plant Developmental Responses to External and Internal Signals

Animal Structure and Function: an Introduction

Protection, Support, and Movement

Neural Signaling

Neural Regulation

Sensory Systems

Internal Transport

The Immune System: Internal Defense

Gas Exchange

Processing Food and Nutrition

Osmoregulation and Disposal of Metabolic Wastes

Endocrine Regulation

Reproduction

Animal Development

Animal Behavior

Introduction to Ecology: Population Ecology

Community Ecology

Ecosystems and the Biosphere

Ecology and the Geography of Life

Biological Diversity and Conservation Biology

Filters