Question 1

Oxygen has six electrons in its outer shell that can hold up to eight electrons. As a result, oxygen can form up to _____ covalent bonds.

Accepted Answer

two

Question 2

Nucleic acids contain phosphorus but not sulfur.

Accepted Answer

A) True 
 B)False  True

Question 3

Oil and water do not mix together well because

Accepted Answer

A)  water is polar and oil is nonpolar. 
B)  only identical molecules of the same chemical can easily mix together. 
C)  water has hydrogen bonds and oil is polar. 
D)  water and oil are covalently bonded together. 
A)  water is polar and oil is nonpolar. 
B)  only identical molecules of the same chemical can easily mix together. 
C)  water has hydrogen bonds and oil is polar. 
D)  water and oil are covalently bonded together. A

Question 4

Most lipids contain one or more _____ _____, long, hydrophobic hydrocarbon chains.

Accepted Answer

The answer of Most lipids contain one or more _____...

Question 5

The process of partial hydrogenation turns liquid plant lipids into semi-solid lipids by

Accepted Answer

A)  adding antioxidants that prevent lipid oxidation. 
B)  creating hydrocarbon chains that are more kinked than those in natural fats. 
C)  substituting nitrogen for carbon in fatty acid chains. 
D)  removing double bonds from the fatty acid chains of plant lipids. 
A)  adding antioxidants that prevent lipid oxidation. 
B)  creating hydrocarbon chains that are more kinked than those in natural fats. 
C)  substituting nitrogen for carbon in fatty acid chains. 
D)  removing double bonds from the fatty acid chains of plant lipids.

Question 6

In the figure below, a negative ion is surrounded by water molecules.  
The water molecules are oriented as shown above because the slightly _____________ in the water molecule is (are) attracted to the ion.

Accepted Answer

A)  negative hydrogen atoms 
B)  positive hydrogen atoms 
C)  negative oxygen atom 
D)  positive oxygen atom 
A)  negative hydrogen atoms 
B)  positive hydrogen atoms 
C)  negative oxygen atom 
D)  positive oxygen atom

Question 7

A _______ is a compound that maintains the pH of a solution by taking up or releasing hydrogen ions.

Accepted Answer

The answer of A _______ is a compound that maintains...

Question 8

_____ are the most hydrophobic of the four classes of organic compounds because they are made of hydrocarbon chains that repel water.

Accepted Answer

The answer of _____ are the most hydrophobic of the...

Question 9

In the equation 3H₂+N₂→2NH₃, how many molecules of hydrogen gas (H₂) are present?

Accepted Answer

A)  2 
B)  3 
C)  6 
D)  12 
A)  2 
B)  3 
C)  6 
D)  12

Question 10

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 11

An acid is a polar substance that dissolves in water and

Accepted Answer

A)  becomes nonpolar. 
B)  leaves behind an OH- ion. 
C)  accepts hydrogen ions. 
D)  loses hydrogen ions. 
A)  becomes nonpolar. 
B)  leaves behind an OH- ion. 
C)  accepts hydrogen ions. 
D)  loses hydrogen ions.

Question 12

_________ are types of proteins that speed up the rate of chemical reactions in the cell.

Accepted Answer

The answer of _________ are types of proteins that speed...

Question 13

How many hydrogen atoms are in a molecule of C₈H₁₀N₄O₂?

Accepted Answer

A)  8 
B)  10 
C)  24 
D)  20 
A)  8 
B)  10 
C)  24 
D)  20

Question 14

The figure below shows two hydrogen atoms.  
How many covalent bonds will form between these two atoms?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  None, these atoms would form an ionic bond. 
A)  1 
B)  2 
C)  3 
D)  None, these atoms would form an ionic bond.

Question 15

Steroids and proteins are lipids.

Accepted Answer

A) True 
 B)False

Question 16

An atom that becomes charged due to the gain or loss of an electron is called an _______.

Accepted Answer

The answer of An atom that becomes charged due to...

Question 17

A group of monomers bonded together form a _______.

Accepted Answer

The answer of A group of monomers bonded together form...

Question 18

Nucleotides

Accepted Answer

A)  are the building blocks of proteins. 
B)  are involved in every chemical reaction in the cell. 
C)  form physical structures such as hair. 
D)  are the building blocks of DNA. 
A)  are the building blocks of proteins. 
B)  are involved in every chemical reaction in the cell. 
C)  form physical structures such as hair. 
D)  are the building blocks of DNA.

Question 19

A monosaccharide is made up of several sugar molecules strung together.

Accepted Answer

A) True 
 B)False

Question 20

________ ________ are a type of organic compound that plays roles in both heredity and the energy delivery in cells.

Accepted Answer

The answer of ________ ________ are a type of organic...

Exam 4: Chemical Building Blocks

Oxygen has six electrons in its outer shell that can hold up to eight electrons. As a result, oxygen can form up to _____ covalent bonds.

Nucleic acids contain phosphorus but not sulfur.

Oil and water do not mix together well because

Most lipids contain one or more _____ _____, long, hydrophobic hydrocarbon chains.

The process of partial hydrogenation turns liquid plant lipids into semi-solid lipids by

In the figure below, a negative ion is surrounded by water molecules. The water molecules are oriented as shown above because the slightly _____________ in the water molecule is (are) attracted to the ion.

A _______ is a compound that maintains the pH of a solution by taking up or releasing hydrogen ions.

_____ are the most hydrophobic of the four classes of organic compounds because they are made of hydrocarbon chains that repel water.

In the equation 3H₂+N₂→2NH₃, how many molecules of hydrogen gas (H₂) are present?

A proton has _______ charge.

An acid is a polar substance that dissolves in water and

_________ are types of proteins that speed up the rate of chemical reactions in the cell.

How many hydrogen atoms are in a molecule of C₈H₁₀N₄O₂?

The figure below shows two hydrogen atoms. How many covalent bonds will form between these two atoms?

Steroids and proteins are lipids.

An atom that becomes charged due to the gain or loss of an electron is called an _______.

A group of monomers bonded together form a _______.

Nucleotides

A monosaccharide is made up of several sugar molecules strung together.

________ ________ are a type of organic compound that plays roles in both heredity and the energy delivery in cells.

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

Filters

Most lipids contain one or more _ _, long, hydrophobic hydrocarbon chains.

are a type of organic compound that plays roles in both heredity and the energy delivery in cells.