Question 1

Individual water molecules are pulled toward each other by _______ bonds.

Accepted Answer

A)  covalent 
B)  hydrogen 
C)  peptide 
D)  ionic 
A)  covalent 
B)  hydrogen 
C)  peptide 
D)  ionic

Question 2

The monomers in proteins are ________.

Accepted Answer

The answer of The monomers in proteins are ________....

Question 3

When you place a piece of red meat on a hot barbeque, it slowly changes from soft to firm. Meat is primarily made of proteins. Which of the following might account for the change in meat texture during cooking?

Accepted Answer

A)  The heat causes the cells in the meat to produce more protein. 
B)  The heat causes the chemical bonds to form between the proteins and nucleic acids in the meat. 
C)  The heat from the barbeque converts proteins into lipids. 
D)  The addition of heat causes proteins to lose their three-dimensional shape and link together. 
A)  The heat causes the cells in the meat to produce more protein. 
B)  The heat causes the chemical bonds to form between the proteins and nucleic acids in the meat. 
C)  The heat from the barbeque converts proteins into lipids. 
D)  The addition of heat causes proteins to lose their three-dimensional shape and link together.

Question 4

The predominant atom in living systems is _______.

Accepted Answer

The answer of The predominant atom in living systems is...

Question 5

Covalent bonds contain ions.

Accepted Answer

A) True 
 B)False

Question 6

Most living organisms consist of more than 70 percent _______ by weight.

Accepted Answer

The answer of Most living organisms consist of more than...

Question 7

Describe how the chemical makeup of a carbohydrate differs from that of a nucleic acid.

Accepted Answer

Carbohydrates and nucleic acids are both

Question 8

Chemical reactions rearrange atoms but do not create or destroy them.

Accepted Answer

A) True 
 B)False

Question 9

The strongest possible chemical link between two atoms is a(n)

Accepted Answer

A)  covalent bond. 
B)  hydrogen bond. 
C)  noncovalent bond. 
D)  ionic bond. 
A)  covalent bond. 
B)  hydrogen bond. 
C)  noncovalent bond. 
D)  ionic bond.

Question 10

The sugar glucose has an important role

Accepted Answer

A)  in the formation of proteins. 
B)  in short-term energy storage. 
C)  in the formation of membranes. 
D)  as a building block of nucleotides. 
A)  in the formation of proteins. 
B)  in short-term energy storage. 
C)  in the formation of membranes. 
D)  as a building block of nucleotides.

Question 11

Which of the following levels of protein structure involves more than one chain of amino acids?

Accepted Answer

A)  primary structure 
B)  secondary structure 
C)  tertiary structure 
D)  quaternary structure 
A)  primary structure 
B)  secondary structure 
C)  tertiary structure 
D)  quaternary structure

Question 12

A molecule composed of amino acids is

Accepted Answer

A)  a nucleotide. 
B)  a lipid. 
C)  a carbohydrate. 
D)  a protein. 
A)  a nucleotide. 
B)  a lipid. 
C)  a carbohydrate. 
D)  a protein.

Question 13

Radioisotopes are useful in scientific research and medicine because they

Accepted Answer

A)  have a different number of protons than other isotopes of the same element. 
B)  give off high-energy radiation that can be detected by film and specialized scanning machines. 
C)  have the same atomic mass as other isotopes of the same element. 
D)  all of the above 
A)  have a different number of protons than other isotopes of the same element. 
B)  give off high-energy radiation that can be detected by film and specialized scanning machines. 
C)  have the same atomic mass as other isotopes of the same element. 
D)  all of the above

Question 14

A solution with a pH of 7 is neither acidic nor basic.

Accepted Answer

A) True 
 B)False

Question 15

An atom of the element with the atomic number of 11 (which can form an ion) always contains 11 _____.

Accepted Answer

A)  neutrons 
B)  nuclei 
C)  electrons 
D)  protons 
A)  neutrons 
B)  nuclei 
C)  electrons 
D)  protons

Question 16

An atom is in its most stable state when all its electron shells are filled to capacity.

Accepted Answer

A) True 
 B)False

Question 17

A molecule with the general formula CH₂O is a(n)

Accepted Answer

A)  protein. 
B)  carbohydrate. 
C)  amino acid. 
D)  nucleic acid. 
A)  protein. 
B)  carbohydrate. 
C)  amino acid. 
D)  nucleic acid.

Exam 4: Chemical Building Blocks

Individual water molecules are pulled toward each other by _______ bonds.

The monomers in proteins are ________.

When you place a piece of red meat on a hot barbeque, it slowly changes from soft to firm. Meat is primarily made of proteins. Which of the following might account for the change in meat texture during cooking?

The predominant atom in living systems is _______.

Covalent bonds contain ions.

Most living organisms consist of more than 70 percent _______ by weight.

Describe how the chemical makeup of a carbohydrate differs from that of a nucleic acid.

Chemical reactions rearrange atoms but do not create or destroy them.

The strongest possible chemical link between two atoms is a(n)

The sugar glucose has an important role

Which of the following levels of protein structure involves more than one chain of amino acids?

A molecule composed of amino acids is

Radioisotopes are useful in scientific research and medicine because they

A solution with a pH of 7 is neither acidic nor basic.

An atom of the element with the atomic number of 11 (which can form an ion) always contains 11 _____.

An atom is in its most stable state when all its electron shells are filled to capacity.

A molecule with the general formula CH₂O is a(n)

The Nature of Science and the Characteristics of Life

Organizing the Diversity of Life

Major Groups of Living Organisms

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Patterns of Inheritance

Chromosomes and Human Genetics

DNA

From Gene to Protein

Control of Gene Expression

DNA Technology

How Evolution Works

Evolution of Populations

Adaptation and Speciation

The Evolutionary History of Life

Maintaining the Internal Environment

Animal Nutrition and Digestion

Gas Exchange

The Circulatory System

Animal Hormones

The Nervous System

Sensing the Environment

Skeletons, Muscles, and Movement

Defenses against Disease

Reproduction and Development

Animal Behavior

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

The Biosphere

Growth of Populations

Interactions among Organisms

Communities of Organisms

Ecosystems

Global Change

Biodiversity and People

Cancer: Cell Division Out of Control

Harnessing the Human Genome

Humans and Evolution

Smoking--Beyond Lung Cancer

Feeding a Hungry Planet

Building a Sustainable Society

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