Question 1

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

Accepted Answer

A)  Dehydration reactions occur only in animals, and hydrolysis reactions occur only in plants. 
B)  Dehydration reactions can occur only after hydrolysis. 
C)  Hydrolysis creates monomers, and dehydration reactions destroy them. 
D)  Dehydration reactions assemble polymers, and hydrolysis breaks them down. 
E)  Hydrolysis creates polysaccharides, and dehydration creates monosaccharides. 
A)  Dehydration reactions occur only in animals, and hydrolysis reactions occur only in plants. 
B)  Dehydration reactions can occur only after hydrolysis. 
C)  Hydrolysis creates monomers, and dehydration reactions destroy them. 
D)  Dehydration reactions assemble polymers, and hydrolysis breaks them down. 
E)  Hydrolysis creates polysaccharides, and dehydration creates monosaccharides. D

Question 2

Adenosine triphosphate (ATP) is an example of a(n)

Accepted Answer

A)  inorganic molecule. 
B)  carbohydrate. 
C)  protein. 
D)  lipid. 
E)  nucleotide. 
A)  inorganic molecule. 
B)  carbohydrate. 
C)  protein. 
D)  lipid. 
E)  nucleotide. E

Question 3

Dehydration synthesis involves the removal of a hydrogen ion and a hydroxyl ion. What happens next?

Accepted Answer

A)  A large polymer is split apart into small monomers. 
B)  A polysaccharide is released from a monosaccharide. 
C)  The hydrogen ion becomes an isotope. 
D)  The hydrogen and hydroxyl ions combine to form water. 
A)  A large polymer is split apart into small monomers. 
B)  A polysaccharide is released from a monosaccharide. 
C)  The hydrogen ion becomes an isotope. 
D)  The hydrogen and hydroxyl ions combine to form water. D

Question 4

Which of the following is NOT an organic molecule?

Accepted Answer

A)  Lipid 
B)  Monosaccharide 
C)  Carbon monoxide 
D)  Protein 
E)  Nucleic acid 
A)  Lipid 
B)  Monosaccharide 
C)  Carbon monoxide 
D)  Protein 
E)  Nucleic acid

Question 5

Fatty acids that contain double-bonded carbon atoms are called _________.

Accepted Answer

The answer of Fatty acids that contain double-bonded carbon atoms...

Question 6

Soap and detergent molecules have a long, hydrophobic tail and a polar, hydrophilic head. They are sometimes referred to as bridge molecules because they allow oils and fats to be suspended and dissolved in water (which they otherwise would not be able to do). Imagine that you are using soap to wash away dirt that is being held against your skin in an oily film.
-In this scenario, what is the most likely procedure beer makers use to produce alcohol from starchy grains?

Accepted Answer

A)  Water is used to break the bonds between glucose subunits in the starch, in a form of dehydration synthesis. 
B)  The starch is broken down into mono- and/or disaccharides by hydrolysis before use. 
C)  The starch is converted into a polymer of many glucose molecules before being used. 
D)  The starch is converted into glycogen, which is easier for the yeast to digest. 
A)  Water is used to break the bonds between glucose subunits in the starch, in a form of dehydration synthesis. 
B)  The starch is broken down into mono- and/or disaccharides by hydrolysis before use. 
C)  The starch is converted into a polymer of many glucose molecules before being used. 
D)  The starch is converted into glycogen, which is easier for the yeast to digest.

Question 7

The ʺbackboneʺ of a nucleic acid molecule is made of

Accepted Answer

A)  NAD+ and FAD. 
B)  amino acids. 
C)  sugar and phosphate groups. 
D)  lipids. 
E)  ATP molecules. 
A)  NAD+ and FAD. 
B)  amino acids. 
C)  sugar and phosphate groups. 
D)  lipids. 
E)  ATP molecules.

Question 8

Complex, three-dimensional, tertiary structures of proteins result from

Accepted Answer

A)  ionic bonds. 
B)  ionic and hydrogen bonds 
C)  disulfide bonds. 
D)  hydrogen bonds. 
E)  hydrogen and disulfide bonds. 
A)  ionic bonds. 
B)  ionic and hydrogen bonds 
C)  disulfide bonds. 
D)  hydrogen bonds. 
E)  hydrogen and disulfide bonds.

Question 9

An example of a structural polysaccharide is

Accepted Answer

A)  maltose. 
B)  glycogen. 
C)  starch. 
D)  glucose. 
E)  cellulose. 
A)  maltose. 
B)  glycogen. 
C)  starch. 
D)  glucose. 
E)  cellulose.

Question 10

RNA differs from DNA in that RNA contains the sugar_________ .

Accepted Answer

The answer of RNA differs from DNA in that RNA...

Question 11

Where is glycogen stored in vertebrate animals?

Accepted Answer

A)  Fat cells 
B)  Brain and kidneys 
C)  Teeth and bones 
D)  Pancreas and blood 
E)  Liver and muscles 
A)  Fat cells 
B)  Brain and kidneys 
C)  Teeth and bones 
D)  Pancreas and blood 
E)  Liver and muscles

Question 12

Proteins are formed by joining amino acids together into a polymer. A_________ bond joins the amino end of one amino acid with the carboxyl end of another.

Accepted Answer

The answer of Proteins are formed by joining amino acids...

Question 13

Which of the following biological molecules are composed of amino acid subunits?

Accepted Answer

A)  Proteins 
B)  Nucleic acids 
C)  Lipids 
D)  Carbohydrates 
A)  Proteins 
B)  Nucleic acids 
C)  Lipids 
D)  Carbohydrates

Question 14

Chitin is an example of a

Accepted Answer

A)  monomer. 
B)  triglyceride. 
C)  peptide. 
D)  polysaccharide. 
E)  nucleic acid. 
A)  monomer. 
B)  triglyceride. 
C)  peptide. 
D)  polysaccharide. 
E)  nucleic acid.

Question 15

Which of the following may possess primary, secondary, tertiary, and quaternary structures?

Accepted Answer

A)  Lipids 
B)  Nucleic acids 
C)  Carbohydrates 
D)  Proteins 
A)  Lipids 
B)  Nucleic acids 
C)  Carbohydrates 
D)  Proteins

Question 16

Imagine that you have isolated a mysterious liquid from a sample of food. You add the liquid to a beaker of water and shake vigorously. After a few minutes, the water and the other liquid separate into two layers. To which class of biological molecules does the unknown liquid most likely belong?

Accepted Answer

A)  Carbohydrates 
B)  Lipids 
C)  Nucleic acids 
D)  Enzymes 
E)  Proteins 
A)  Carbohydrates 
B)  Lipids 
C)  Nucleic acids 
D)  Enzymes 
E)  Proteins

Question 17

Large biological molecules are synthesized by removing

Accepted Answer

A)  carbon. 
B)  water. 
C)  peptides. 
D)  covalent bonds. 
E)  oxygen. 
A)  carbon. 
B)  water. 
C)  peptides. 
D)  covalent bonds. 
E)  oxygen.

Question 18

Why is it an advantage for animals that migrate long distances to store energy as lipids rather than carbohydrates?

Accepted Answer

Lipids (fats) store

Question 19

Which molecule is a disaccharide?

Accepted Answer

A)  Glucose 
B)  Lactose 
C)  Water 
D)  Fructose 
A)  Glucose 
B)  Lactose 
C)  Water 
D)  Fructose

Question 20

How many hydrogen bonds exist between a G-C base pair?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Exam 3: Biological Molecules

Which of the following best summarizes the relationship between dehydration reactions and hydrolysis?

Adenosine triphosphate (ATP) is an example of a(n)

Dehydration synthesis involves the removal of a hydrogen ion and a hydroxyl ion. What happens next?

Which of the following is NOT an organic molecule?

Fatty acids that contain double-bonded carbon atoms are called _________.

The ʺbackboneʺ of a nucleic acid molecule is made of

Complex, three-dimensional, tertiary structures of proteins result from

An example of a structural polysaccharide is

RNA differs from DNA in that RNA contains the sugar_________ .

Where is glycogen stored in vertebrate animals?

Proteins are formed by joining amino acids together into a polymer. A_________ bond joins the amino end of one amino acid with the carboxyl end of another.

Which of the following biological molecules are composed of amino acid subunits?

Chitin is an example of a

Which of the following may possess primary, secondary, tertiary, and quaternary structures?

Imagine that you have isolated a mysterious liquid from a sample of food. You add the liquid to a beaker of water and shake vigorously. After a few minutes, the water and the other liquid separate into two layers. To which class of biological molecules does the unknown liquid most likely belong?

Large biological molecules are synthesized by removing

Why is it an advantage for animals that migrate long distances to store energy as lipids rather than carbohydrates?

Which molecule is a disaccharide?

How many hydrogen bonds exist between a G-C base pair?

An Introduction to Life on Earth

Atoms, Molecules, and Life

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

DNA: The Molecule of Heredity

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

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