Question 1

By the early 1900s, scientists had determined that heritable information existed as discrete units called genes,
which were located on .

Accepted Answer

The answer of By the early 1900s, scientists had determined...

Question 2

Segments of DNA that are made during replication are joined together by .

Accepted Answer

The answer of Segments of DNA that are made during...

Question 3

What determines the function of the gene product?

Accepted Answer

A)  The number of phosphates 
B)  The sequence of phosphates 
C)  The sequence of bases 
D)  The number of bases 
E)  The sequences of deoxyribose 
A)  The number of phosphates 
B)  The sequence of phosphates 
C)  The sequence of bases 
D)  The number of bases 
E)  The sequences of deoxyribose

Question 4

Regarding the structure of DNA, which of the following is covalently bonded to a nitrogen base?

Accepted Answer

A)  Phospholipid 
B)  Ribose 
C)  Hydrogen bonds 
D)  Deoxyribose 
E)  Phosphate 
A)  Phospholipid 
B)  Ribose 
C)  Hydrogen bonds 
D)  Deoxyribose 
E)  Phosphate

Question 5

replication is the process when DNA uses one parental strand and synthesizes a new strand, resulting in each daughter cell having a new and parental DNA strand.

Accepted Answer

A)  Redundant 
B)  Inversion 
C)  Semiconservative 
D)  Conservative 
A)  Redundant 
B)  Inversion 
C)  Semiconservative 
D)  Conservative

Question 6

Agents that cause mutations are called mutagens. All of the following are examples of mutagens EXCEPT

Accepted Answer

A)  vitamins. 
B)  ultraviolet radiation. 
C)  X- rays. 
D)  cigarette smoke. 
A)  vitamins. 
B)  ultraviolet radiation. 
C)  X- rays. 
D)  cigarette smoke.

Question 7

DNA polymerase, before any proofreading by repair enzymes, makes one mistake for about every

Accepted Answer

A)  100 to 1,000 base pairs. 
B)  100 million to 10 billion base pairs. 
C)  10,000 to 1 million base pairs. 
D)  1 to 100 base pairs. 
E)  1 million to 10 million base pairs. 
A)  100 to 1,000 base pairs. 
B)  100 million to 10 billion base pairs. 
C)  10,000 to 1 million base pairs. 
D)  1 to 100 base pairs. 
E)  1 million to 10 million base pairs.

Question 8

Briefly describe the experiments conducted by Avery, McCarty, and MacLeod. What was the relevance of their research?

Accepted Answer

The Avery, McCarty, and MacLeo

Question 9

What was the most significant conclusion of Griffith's experiments with pneumonia in mice?

Accepted Answer

A)  Mice exposed to the S- strain bacterium became resistant to the R- strain bacterium. 
B)  Heat destroys the hereditary material. 
C)  The genetic material was definitively proven to be DNA. 
D)  There is a substance present in dead bacteria that can cause a heritable change in living bacteria. 
E)  S- strain bacteria can cause pneumonia. 
A)  Mice exposed to the S- strain bacterium became resistant to the R- strain bacterium. 
B)  Heat destroys the hereditary material. 
C)  The genetic material was definitively proven to be DNA. 
D)  There is a substance present in dead bacteria that can cause a heritable change in living bacteria. 
E)  S- strain bacteria can cause pneumonia.

Question 10

The 'rule" formulated by Chargaff states that

Accepted Answer

A)  A = U and G = C in any molecule of RNA. 
B)  A = G and C = T in any molecule of DNA. 
C)  A = C and G = T in any molecule of DNA. 
D)  A = T and G = C in any molecule of DNA. 
E)  DNA and RNA are made up of the same four nitrogenous bases. 
A)  A = U and G = C in any molecule of RNA. 
B)  A = G and C = T in any molecule of DNA. 
C)  A = C and G = T in any molecule of DNA. 
D)  A = T and G = C in any molecule of DNA. 
E)  DNA and RNA are made up of the same four nitrogenous bases.

Question 11

Regarding the structure of DNA, the units that form the "uprights" (sides) of the DNA ladder and do not attach to the nitrogen bases are

Accepted Answer

A)  ribose molecules. 
B)  deoxyribose molecules. 
C)  phosphate molecules. 
D)  sulfur- containing bases. 
A)  ribose molecules. 
B)  deoxyribose molecules. 
C)  phosphate molecules. 
D)  sulfur- containing bases.

Question 12

A cell that lacks the ability to make DNA repair enzymes will

Accepted Answer

A)  replicate its DNA as rapidly as a normal cell, but the resulting DNA will have more errors in it. 
B)  be able to correctly replicate its DNA, but it will need more time to do so. 
C)  be unable to replicate its DNA. 
D)  replicate its DNA as well as a cell with intact repair enzymes. 
A)  replicate its DNA as rapidly as a normal cell, but the resulting DNA will have more errors in it. 
B)  be able to correctly replicate its DNA, but it will need more time to do so. 
C)  be unable to replicate its DNA. 
D)  replicate its DNA as well as a cell with intact repair enzymes.

Question 13

How many bases are in the DNA molecule of a typical human chromosome?

Accepted Answer

A)  Thousands 
B)  Two 
C)  Four 
D)  Millions 
A)  Thousands 
B)  Two 
C)  Four 
D)  Millions

Question 14

What is the relationship among DNA, a gene, and a chromosome?

Accepted Answer

A)  A gene contains hundreds of chromosomes, which are composed of DNA. 
B)  A gene is composed of DNA, but it has no relationship to a chromosome. 
C)  A gene contains hundreds of chromosomes, which are composed of protein. 
D)  A chromosome contains hundreds of genes, which are composed of protein. 
E)  A chromosome contains hundreds of genes, which are composed of DNA. 
A)  A gene contains hundreds of chromosomes, which are composed of DNA. 
B)  A gene is composed of DNA, but it has no relationship to a chromosome. 
C)  A gene contains hundreds of chromosomes, which are composed of protein. 
D)  A chromosome contains hundreds of genes, which are composed of protein. 
E)  A chromosome contains hundreds of genes, which are composed of DNA.

Question 15

The DNA of chromosomes is composed of two strands wound about each other in the shape of a .

Accepted Answer

double hel

Question 16

A(n) mutation is when one or more nucleotide pairs are lost.

Accepted Answer

A)  insertion 
B)  inversion 
C)  nucleotide substitution 
D)  deletion 
A)  insertion 
B)  inversion 
C)  nucleotide substitution 
D)  deletion

Question 17

The number of subunits in a DNA molecule is more important to its function than the sequence of these subunits.

Accepted Answer

A) True 
 B)False

Exam 12: Dna: the Molecule of Heredity

By the early 1900s, scientists had determined that heritable information existed as discrete units called genes, which were located on .

Segments of DNA that are made during replication are joined together by .

What determines the function of the gene product?

Regarding the structure of DNA, which of the following is covalently bonded to a nitrogen base?

replication is the process when DNA uses one parental strand and synthesizes a new strand, resulting in each daughter cell having a new and parental DNA strand.

Agents that cause mutations are called mutagens. All of the following are examples of mutagens EXCEPT

DNA polymerase, before any proofreading by repair enzymes, makes one mistake for about every

Briefly describe the experiments conducted by Avery, McCarty, and MacLeod. What was the relevance of their research?

What was the most significant conclusion of Griffith's experiments with pneumonia in mice?

The 'rule" formulated by Chargaff states that

Regarding the structure of DNA, the units that form the "uprights" (sides) of the DNA ladder and do not attach to the nitrogen bases are

A cell that lacks the ability to make DNA repair enzymes will

How many bases are in the DNA molecule of a typical human chromosome?

What is the relationship among DNA, a gene, and a chromosome?

The DNA of chromosomes is composed of two strands wound about each other in the shape of a .

A(n) mutation is when one or more nucleotide pairs are lost.

The number of subunits in a DNA molecule is more important to its function than the sequence of these subunits.

An Introduction to Life on Earth

Atoms, Molecules, and Life

Biological Molecules

Cell Structure and Function

Cell Membrane Structure and Function

Energy Flow in the Life of a Cell

Capturing Solar Energy: Photosynthesis

Harvesting Energy: Glycolysis and Cellular Respiration

Cellular Reproduction

Meiosis: the Basis of Sexual Reproduction

Patterns of Inheritance

Gene Expression and Regulation

Biotechnology

Principles of Evolution

How Populations Evolve

The Origin of Species

The History of Life

Systematics: Seeking Order Amid Diversity

The Diversity of Prokaryotes and Viruses

The Diversity of Protists

The Diversity of Plants

The Diversity of Fungi

Animal Diversity I: Invertebrates

Animal Diversity II: Vertebrates

Animal Behavior

Population Growth and Regulation

Community Interactions

Energy Flow and Nutrient Cycling in Ecosystems

Earths Diverse Ecosystems

Conserving Earths Biodiversity

Homeostasis and the Organization of the Animal Body

Circulation

Respiration

Nutrition and Digestion

The Urinary System

Defenses Against Disease

Chemical Control of the Animal Body: the Endocrine System

The Nervous System

The Senses

Action and Support: the Muscles and Skeleton

Animal Reproduction

Animal Development

Plant Anatomy and Nutrient Transport

Plant Reproduction and Development

Plant Responses to the Environment

Filters