Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

You purchase a laundry product that claims to use natural enzymes to remove stains from clothing.After spilling grape juice on your favorite shirt,you apply the product and wash your shirt (following the directions,of course).When you pull the shirt out of the washer,the stain is still there! Which of the following might explain why the stain remover did not work?

Accepted Answer

A)  The stain remover and the grape juice are both hydrophilic,so the enzymes could not interact with the stain. 
B)  The pH of the water in your house has a pH of 7.0,which prevents the enzymes from working properly. 
C)  Before you got home from the store,you stopped at the mall and left your stain remover in the trunk of your car on a hot day,denaturing the enzymes. 
D)  The stain remover and the grape juice are both hydrophobic,so the enzymes could not interact with the stain. 
A)  The stain remover and the grape juice are both hydrophilic,so the enzymes could not interact with the stain. 
B)  The pH of the water in your house has a pH of 7.0,which prevents the enzymes from working properly. 
C)  Before you got home from the store,you stopped at the mall and left your stain remover in the trunk of your car on a hot day,denaturing the enzymes. 
D)  The stain remover and the grape juice are both hydrophobic,so the enzymes could not interact with the stain.

Question 4

In the equation 2 H2O2 $\rarr$ 2 H2O + O2,the H2O2 molecules are the ________ and the H2O + O2 molecules are the ________.

Accepted Answer

A)  products;products 
B)  reactants;products 
C)  products;reactants 
D)  reactants;reactants 
A)  products;products 
B)  reactants;products 
C)  products;reactants 
D)  reactants;reactants

Question 5

Which statement below is consistent with the facts that one function of nucleotides is energy transfer and that carbohydrates can be used to store energy?

Accepted Answer

A)  If we humans could not store and transfer energy,we would have to match our energy input (eating)exactly to our energy requirements,even while sleeping. 
B)  There are not enough kinds of amino acids for proteins to be used as energy storage molecules. 
C)  Energy transfer and storage are processes that are unique to humans and,therefore,they are used to determine the classification of people. 
D)  Energy transfer is how we take the energy we gather from photosynthesis and transfer it into water molecules for later use when we need energy. 
A)  If we humans could not store and transfer energy,we would have to match our energy input (eating)exactly to our energy requirements,even while sleeping. 
B)  There are not enough kinds of amino acids for proteins to be used as energy storage molecules. 
C)  Energy transfer and storage are processes that are unique to humans and,therefore,they are used to determine the classification of people. 
D)  Energy transfer is how we take the energy we gather from photosynthesis and transfer it into water molecules for later use when we need energy.

Question 6

Fevers in young children are a particular concern because oxygen is less effectively transported by hemoglobin at high temperature.How might this be explained?

Accepted Answer

A)  The hemoglobin becomes denatured and cannot transport the oxygen. 
B)  The oxygen becomes denatured and cannot bind to the hemoglobin. 
C)  Oxygen has too much thermal energy to be bound by hemoglobin. 
D)  Oxygen evaporates at high temperature and is not available for binding with hemoglobin. 
A)  The hemoglobin becomes denatured and cannot transport the oxygen. 
B)  The oxygen becomes denatured and cannot bind to the hemoglobin. 
C)  Oxygen has too much thermal energy to be bound by hemoglobin. 
D)  Oxygen evaporates at high temperature and is not available for binding with hemoglobin.

Question 7

The number of electrons surrounding an atom's core never changes.

Accepted Answer

A) True 
 B)False

Question 8

Macromolecules are typically formed by repetitively adding small monomers together;which macromolecule is properly matched with the appropriate monomer?

Accepted Answer

A)  polypeptide-amino acid 
B)  nucleic acid-amino acid 
C)  polysaccharide-nucleotide 
D)  triglyceride-cholesterol 
A)  polypeptide-amino acid 
B)  nucleic acid-amino acid 
C)  polysaccharide-nucleotide 
D)  triglyceride-cholesterol

Question 9

Steroids and proteins are different types of lipids.

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

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

Question 11

A proton has ________ charge.

Accepted Answer

A)  no 
B)  a neutral 
C)  a negative 
D)  a positive 
A)  no 
B)  a neutral 
C)  a negative 
D)  a positive

Question 12

Ionic bonds

Accepted Answer

A)  result from the sharing of electrons between atoms. 
B)  form only between polar molecules. 
C)  form between atoms that develop opposite charges. 
D)  result from the natural repulsion that develops between protons. 
A)  result from the sharing of electrons between atoms. 
B)  form only between polar molecules. 
C)  form between atoms that develop opposite charges. 
D)  result from the natural repulsion that develops between protons.

Question 13

Referencing the image below,________ water molecules would be required for hydrolysis to completely separate the 6-monomer polymer into individual monomers.

Accepted Answer

The answer of Referencing the image below,________ water molecules would...

Exam 2: The Chemistry of Life

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

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

In the equation 2 H2O2 →\rarr→ 2 H2O + O2,the H2O2 molecules are the ________ and the H2O + O2 molecules are the ________.

Which statement below is consistent with the facts that one function of nucleotides is energy transfer and that carbohydrates can be used to store energy?

Fevers in young children are a particular concern because oxygen is less effectively transported by hemoglobin at high temperature.How might this be explained?

The number of electrons surrounding an atom's core never changes.

Macromolecules are typically formed by repetitively adding small monomers together;which macromolecule is properly matched with the appropriate monomer?

Steroids and proteins are different types of lipids.

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

A proton has ________ charge.

Ionic bonds

Referencing the image below,________ water molecules would be required for hydrolysis to completely separate the 6-monomer polymer into individual monomers.

The Nature of Science and the Characteristics of Life

Cell Structure and Internal Compartments

Cell Membranes, Transport, and Communication

Energy, Metabolism, and Enzymes

Photosynthesis and Cellular Respiration

Cell Division

Cancer and Human Health

Patterns of Inheritance

Chromosomes and Human Genetics

DNA and Genes

From Gene to Protein

DNA Technology

How Evolution Works

The Origin of Species

The Evolution of Biodiversity

Biological Diversity, Bacteria, and Archaea

Protista, Plantae, and Fungi

Animalia

The Biosphere

Growth of Populations

Animal Behavior

Ecological Communities

Ecosystems

Global Change

Internal Organization and Homeostasis

Nutrition and Digestion

Circulation and Gas Exchange

Animal Hormones

Nervous and Sensory Systems

Skeletons,Muscles,and Movement

The Immune System

Reproduction and Development

Plant Structure, Nutrition, and Transport

Plant Growth and Reproduction

Filters

In the equation 2 H₂O₂ $\rarr$ 2 H₂O + O₂,the H₂O₂ molecules are the and the H₂O + O₂ molecules are the .