Question 1

Molecules that are polar and attracted to water are ________; molecules that are nonpolar and therefore not attracted to water are ________.

Accepted Answer

hydrophili

Question 2

Use the letters from the figure below to answer the following questions.
  
-The label ________ points to a neutron.

Accepted Answer

The answer of Use the letters from the figure below...

Question 3

Protons and neutrons are located in the ________ of an atom.

Accepted Answer

The answer of Protons and neutrons are located in the...

Question 4

-The figure above shows a triglyceride that is liquid at room temperature.

Accepted Answer

A) True 
 B)False

Question 5

Potential energy is energy that has not been used yet, but has the potential to do work.

Accepted Answer

A) True 
 B)False

Question 6

Isotopes of an element have the same ________, but different ________.

Accepted Answer

A)  number of electron shells, numbers of protons 
B)  atomic number, atomic masses 
C)  number of neutrons, numbers of protons 
D)  atomic mass, atomic numbers 
E)  name, chemical symbols 
A)  number of electron shells, numbers of protons 
B)  atomic number, atomic masses 
C)  number of neutrons, numbers of protons 
D)  atomic mass, atomic numbers 
E)  name, chemical symbols

Question 7

Molecules that give up or donate hydrogen ions are ________.

Accepted Answer

The answer of Molecules that give up or donate hydrogen...

Question 8

A solution has been prepared by mixing glucose in water. Which one of the following statements CORRECTLY describes this solution?

Accepted Answer

A)  Both water and glucose are solutes. 
B)  Both water and glucose are solvents. 
C)  Water is the solute, and glucose is the solvent. 
D)  Water is the solvent, and glucose is the solute. 
A)  Both water and glucose are solutes. 
B)  Both water and glucose are solvents. 
C)  Water is the solute, and glucose is the solvent. 
D)  Water is the solvent, and glucose is the solute.

Question 9

Use the letters from the figure below to answer the following questions.
  
-In order for this atom to develop a positive charge, it would have to lose ________.

Accepted Answer

The answer of Use the letters from the figure below...

Question 10

In the human body, bicarbonate and carbonate ions work together to stabilize or buffer the pH of body fluids. What would happen to blood if these buffering agents were removed?

Accepted Answer

Blood pH could not be regulated in the a

Question 11

Which one of the following is the study of matter and the energy that causes matter to combine, break apart, and recombine in everything living and nonliving?

Accepted Answer

A)  biology 
B)  geology 
C)  chemistry 
D)  physics 
A)  biology 
B)  geology 
C)  chemistry 
D)  physics

Question 12

The difference between water molecules in liquid water and water molecules in ice is in the number of covalent bonds that form.

Accepted Answer

A) True 
 B)False

Question 13

The total number of protons and neutrons in an atom can best be determined by

Accepted Answer

A)  atomic mass 
B)  the subscript number following the chemical symbol 
C)  atomic number 
D)  the charge of the atom 
E)  the chemical symbol 
A)  atomic mass 
B)  the subscript number following the chemical symbol 
C)  atomic number 
D)  the charge of the atom 
E)  the chemical symbol

Question 14

Each of the following statements is TRUE regarding hydrogen bonds EXCEPT which one?

Accepted Answer

A)  Hydrogen bonds hold the two strands of DNA together. 
B)  Hydrogen bonds are responsible for the attraction of Na⁺ to Cl⁻. 
C)  Hydrogen bonds are responsible for some aspects of the three-dimensional structure of proteins. 
D)  Hydrogen bonds form between different water molecules. 
A)  Hydrogen bonds hold the two strands of DNA together. 
B)  Hydrogen bonds are responsible for the attraction of Na⁺ to Cl⁻. 
C)  Hydrogen bonds are responsible for some aspects of the three-dimensional structure of proteins. 
D)  Hydrogen bonds form between different water molecules.

Question 15

A student measuring the pH of the water in a fish tank found it to have a pH of 8. Which one of the following statements is TRUE regarding that solution?

Accepted Answer

A)  The water is alkaline. 
B)  The water does not contain hydrogen ions. 
C)  The water contains equal numbers of hydrogen ions and hydroxyl ions. 
D)  The water is highly acidic. 
E)  The water is more alkaline than a solution with a pH of 10. 
A)  The water is alkaline. 
B)  The water does not contain hydrogen ions. 
C)  The water contains equal numbers of hydrogen ions and hydroxyl ions. 
D)  The water is highly acidic. 
E)  The water is more alkaline than a solution with a pH of 10.

Question 16

Which one of the following molecules is stored in adipose tissue and serves as an important source of energy for the human body?

Accepted Answer

A)  glucose 
B)  steroids 
C)  glycogen 
D)  triglycerides 
E)  phospholipids 
A)  glucose 
B)  steroids 
C)  glycogen 
D)  triglycerides 
E)  phospholipids

Question 17

There are ________ different deoxyribonucleotides found in the human genome.

Accepted Answer

The answer of There are ________ different deoxyribonucleotides found in...

Question 18

Which one of the following is TRUE regarding water?

Accepted Answer

A)  Each molecule of water consists of two atoms of hydrogen and one atom of oxygen covalently bonded to each other. 
B)  The oxygen side of the water molecule is partially positive. 
C)  Water is a type of ion. 
D)  Electrons are shared equally between the atoms of water. 
E)  Water molecules are attracted to each other by ionic bonds. 
A)  Each molecule of water consists of two atoms of hydrogen and one atom of oxygen covalently bonded to each other. 
B)  The oxygen side of the water molecule is partially positive. 
C)  Water is a type of ion. 
D)  Electrons are shared equally between the atoms of water. 
E)  Water molecules are attracted to each other by ionic bonds.

Question 19

Sucrose is an oligosaccharide made up of which one of the following sugars?

Accepted Answer

A)  glucose and glucose 
B)  deoxyribose and ribose 
C)  starch and glycogen 
D)  maltose and glucose 
E)  glucose and fructose 
A)  glucose and glucose 
B)  deoxyribose and ribose 
C)  starch and glycogen 
D)  maltose and glucose 
E)  glucose and fructose

Question 20

Water is an excellent solvent for biological systems because

Accepted Answer

A)  it can maintain a relatively unstable temperature for chemical reactions to occur. 
B)  compounds with ionic bonds as well as those with polar covalent bonds readily dissolve in water. 
C)  it is semisolid at body temperature, preventing it from flowing freely through the human body. 
D)  it can rearrange its bonds, forming covalent bonds with other molecules once dissolved. 
A)  it can maintain a relatively unstable temperature for chemical reactions to occur. 
B)  compounds with ionic bonds as well as those with polar covalent bonds readily dissolve in water. 
C)  it is semisolid at body temperature, preventing it from flowing freely through the human body. 
D)  it can rearrange its bonds, forming covalent bonds with other molecules once dissolved.

Exam 2: The Chemistry of Living Things

Molecules that are polar and attracted to water are ________; molecules that are nonpolar and therefore not attracted to water are ________.

Use the letters from the figure below to answer the following questions. -The label ________ points to a neutron.

Protons and neutrons are located in the ________ of an atom.

-The figure above shows a triglyceride that is liquid at room temperature.

Potential energy is energy that has not been used yet, but has the potential to do work.

Isotopes of an element have the same ________, but different ________.

Molecules that give up or donate hydrogen ions are ________.

A solution has been prepared by mixing glucose in water. Which one of the following statements CORRECTLY describes this solution?

Use the letters from the figure below to answer the following questions. -In order for this atom to develop a positive charge, it would have to lose ________.

In the human body, bicarbonate and carbonate ions work together to stabilize or buffer the pH of body fluids. What would happen to blood if these buffering agents were removed?

Which one of the following is the study of matter and the energy that causes matter to combine, break apart, and recombine in everything living and nonliving?

The difference between water molecules in liquid water and water molecules in ice is in the number of covalent bonds that form.

The total number of protons and neutrons in an atom can best be determined by

Each of the following statements is TRUE regarding hydrogen bonds EXCEPT which one?

A student measuring the pH of the water in a fish tank found it to have a pH of 8. Which one of the following statements is TRUE regarding that solution?

Which one of the following molecules is stored in adipose tissue and serves as an important source of energy for the human body?

There are ________ different deoxyribonucleotides found in the human genome.

Which one of the following is TRUE regarding water?

Sucrose is an oligosaccharide made up of which one of the following sugars?

Water is an excellent solvent for biological systems because

Human Biology, Science, and Society

Structure and Function of Cells

From Cells to Organ Systems

The Skeletal System

The Muscular System

Blood

Heart and Blood Vessels

The Immune System and Mechanisms of Defense

The Respiratory System: Exchange of Gases

The Nervous System: Integration and Control

Sensory Mechanisms

The Endocrine System

The Digestive System and Nutrition

The Urinary System

Reproductive Systems

Cell Reproduction and Differentiation

Cancer: Uncontrolled Cell Division and Differentiation

Genetics and Inheritance

DNA Technology and Genetic Engineering

Development and Aging

Evolution and the Origins of Life

Ecosystems and Populations

Human Impacts, Biodiversity, and Environmental Issues

Filters

Molecules that are polar and attracted to water are ; molecules that are nonpolar and therefore not attracted to water are .

Isotopes of an element have the same , but different .