Question 1

Keratin is an example of a ________ protein.

Accepted Answer

The answer of Keratin is an example of a ________...

Question 2

What is a triglyceride?

Accepted Answer

A)  a lipid made of one glycerol and two fatty acids 
B)  a lipid made of two glycerols, a fatty acid, and a phosphate group 
C)  a lipid made of one glycerol and three fatty acids 
D)  a carbohydrate made of three sugars 
E)  a polypeptide made of three amino acids 
A)  a lipid made of one glycerol and two fatty acids 
B)  a lipid made of two glycerols, a fatty acid, and a phosphate group 
C)  a lipid made of one glycerol and three fatty acids 
D)  a carbohydrate made of three sugars 
E)  a polypeptide made of three amino acids

Question 3

Amino acids are monomers used to build:

Accepted Answer

A)  nucleic acids. 
B)  triglycerides. 
C)  polysaccharides. 
D)  proteins. 
A)  nucleic acids. 
B)  triglycerides. 
C)  polysaccharides. 
D)  proteins.

Question 4

Which of the following is true of steroids?

Accepted Answer

A)  Steroids exist naturally in humans as hormones. 
B)  Some amino acids are steroids. 
C)  If people inject male steroid hormones, they can build muscle mass with no side effects. 
D)  Steroids contain a central, single-ring carbon structure. 
E)  Steroids are polymers. 
A)  Steroids exist naturally in humans as hormones. 
B)  Some amino acids are steroids. 
C)  If people inject male steroid hormones, they can build muscle mass with no side effects. 
D)  Steroids contain a central, single-ring carbon structure. 
E)  Steroids are polymers.

Question 5

All of the following are monosaccharides except:

Accepted Answer

A)  fructose. 
B)  cellulose. 
C)  glucose. 
D)  deoxyribose. 
A)  fructose. 
B)  cellulose. 
C)  glucose. 
D)  deoxyribose.

Question 6

Hydroxyl groups are commonly found in:

Accepted Answer

A)  amino acids. 
B)  DNA. 
C)  carbohydrates. 
D)  fatty acids. 
A)  amino acids. 
B)  DNA. 
C)  carbohydrates. 
D)  fatty acids.

Question 7

You notice that water is running off the feathers of a bird in the rain. The reason is probably that the bird has coated the feathers with ________, which keeps the water out of them.

Accepted Answer

A)  proteins 
B)  polysaccharides 
C)  lipids 
D)  nucleic acids 
A)  proteins 
B)  polysaccharides 
C)  lipids 
D)  nucleic acids

Question 8

Glycogen is a polysaccharide used for energy storage by:

Accepted Answer

A)  plants. 
B)  animals. 
C)  monera. 
D)  fungi. 
A)  plants. 
B)  animals. 
C)  monera. 
D)  fungi.

Question 9

What do wax and testosterone have in common?

Accepted Answer

A)  They are both hormones. 
B)  They are both proteins. 
C)  They are both steroids. 
D)  They are both lipids. 
A)  They are both hormones. 
B)  They are both proteins. 
C)  They are both steroids. 
D)  They are both lipids.

Question 10

The hydrogenation of vegetable oil results in:

Accepted Answer

A)  an increase in the number of double bonds between the carbon atoms. 
B)  the oil becoming more liquid at room temperature. 
C)  a decrease in the number of double bonds between the carbon atoms. 
D)  the conversion of monounsaturated fatty acids into polyunsaturated fatty acids. 
E)  a decrease in the number of hydrogen atoms in the oil molecule. 
A)  an increase in the number of double bonds between the carbon atoms. 
B)  the oil becoming more liquid at room temperature. 
C)  a decrease in the number of double bonds between the carbon atoms. 
D)  the conversion of monounsaturated fatty acids into polyunsaturated fatty acids. 
E)  a decrease in the number of hydrogen atoms in the oil molecule.

Question 11

A triglyceride contains ________ fatty acid chains, whereas a phospholipid contains ________ fatty acid chains.

Accepted Answer

A)  two; three 
B)  four; two 
C)  two; four 
D)  three; two 
A)  two; three 
B)  four; two 
C)  two; four 
D)  three; two

Question 12

If you boil an egg for lunch, the egg white becomes hard, white, and opaque because the protein molecules have unfolded, causing them to stick together. This is an example of how heat ________ a protein.

Accepted Answer

The answer of If you boil an egg for lunch,...

Question 13

You go the store to buy some lard for cooking. You notice when you get home that the lard is solid at room temperature. What does this tell you about the fat in lard, and how does this explain it being solid at room temperature? What type of fat would not be solid at room temperature, and why?

Accepted Answer

Lard is made up of saturated fat that st

Question 14

A nucleotide is a polymer of nucleic acids.

Accepted Answer

A) True 
 B)False

Question 15

Carbon is such an important element for life because it:

Accepted Answer

A)  forms strong ionic bonds. 
B)  can form chemical bonds with a maximum of four other atoms. 
C)  can hydrogen bond to many different molecules. 
D)  is part of the water molecule. 
E)  does not form isomers. 
A)  forms strong ionic bonds. 
B)  can form chemical bonds with a maximum of four other atoms. 
C)  can hydrogen bond to many different molecules. 
D)  is part of the water molecule. 
E)  does not form isomers.

Question 16

An example of an important biological molecule that may contain the -NH2 group is:

Accepted Answer

A)  a triglyceride. 
B)  a starch. 
C)  a glucose molecule. 
D)  an enzyme. 
E)  steroids. 
A)  a triglyceride. 
B)  a starch. 
C)  a glucose molecule. 
D)  an enzyme. 
E)  steroids.

Question 17

If you removed the cuticle from the skin of an apple, the:

Accepted Answer

A)  apple would absorb moisture and get soggy. 
B)  apple would lose water and dehydrate. 
C)  seeds of the apple would die. 
D)  apple would be inedible. 
A)  apple would absorb moisture and get soggy. 
B)  apple would lose water and dehydrate. 
C)  seeds of the apple would die. 
D)  apple would be inedible.

Question 18

Refer to the figure below, and then answer the question that follows.  
-Phospholipids can be made to mix with water if mixed vigorously enough. Predict what kind of structure would be produced based on the chemical characteristics of phospholipids if they are mixed vigorously with water. If water exists outside a cell and water exists inside a cell, propose a way that phospholipids can be used to create a cell membrane.

Accepted Answer

In order to mix with water, phospholipid

Question 19

Nucleotides are the building blocks for:

Accepted Answer

A)  disaccharides. 
B)  ATP, DNA, and RNA. 
C)  proteins. 
D)  lipids. 
E)  steroids. 
A)  disaccharides. 
B)  ATP, DNA, and RNA. 
C)  proteins. 
D)  lipids. 
E)  steroids.

Question 20

Sugar is an organic molecule because it contains:

Accepted Answer

A)  carbon and nitrogen. 
B)  carbon. 
C)  water. 
D)  carbon dioxide. 
E)  carbon and oxygen. 
A)  carbon and nitrogen. 
B)  carbon. 
C)  water. 
D)  carbon dioxide. 
E)  carbon and oxygen.

Exam 3: Lifes Components: Biological Molecules

Keratin is an example of a ________ protein.

What is a triglyceride?

Amino acids are monomers used to build:

Which of the following is true of steroids?

All of the following are monosaccharides except:

Hydroxyl groups are commonly found in:

You notice that water is running off the feathers of a bird in the rain. The reason is probably that the bird has coated the feathers with ________, which keeps the water out of them.

Glycogen is a polysaccharide used for energy storage by:

What do wax and testosterone have in common?

The hydrogenation of vegetable oil results in:

A triglyceride contains ________ fatty acid chains, whereas a phospholipid contains ________ fatty acid chains.

If you boil an egg for lunch, the egg white becomes hard, white, and opaque because the protein molecules have unfolded, causing them to stick together. This is an example of how heat ________ a protein.

You go the store to buy some lard for cooking. You notice when you get home that the lard is solid at room temperature. What does this tell you about the fat in lard, and how does this explain it being solid at room temperature? What type of fat would not be solid at room temperature, and why?

A nucleotide is a polymer of nucleic acids.

Carbon is such an important element for life because it:

An example of an important biological molecule that may contain the -NH2 group is:

If you removed the cuticle from the skin of an apple, the:

Nucleotides are the building blocks for:

Sugar is an organic molecule because it contains:

Science As a Way of Learning: a Guide to the Natural World

Fundamental Building Blocks: Chemistry, Water, and Ph

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

Lifes Mainspring: an Introduction to Energy

Vital Harvest: Deriving Energy From Food

The Green Worlds Gift: Photosynthesis

The Links in Lifes Chain: Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

The First Geneticist: Mendel and His Discoveries

Units of Heredity: Chromosomes and Inheritance

Passing on Lifes Information: Dna Structure and Replication

How Proteins Are Made: Genetic Transcription, Translation, and Regulation

The Future Isnt What It Used to Be: Biotechnology

An Introduction to Evolution: Charles Darwin, Evolutionary Thought, and the Evidence for Evolution

The Means of Evolution: Microevolution

The Outcomes of Evolution: Macroevolution

A Slow Unfolding: the History of Life on Earth

Arriving Late, Traveling Far: the Evolution of Human Beings

Viruses, Bacteria, Archaea, and Protists: the Diversity of Life 1

Fungi : the Diversity of Life 2

Animals: the Diversity of Life 3

Plants: the Diversity of Life 4

The Angiosperms: Form and Function in Flowering Plants

Body Support and Movement: the Integumentary, Skeletal, and Muscular Systems

Communication and Control 1: the Nervous System

Communication and Control 2: the Endocrine System

Defending the Body: the Immune System

Transport and Exchange 1: Blood and Breath

Transport and Exchange 2: Digestion, Nutrition, and Elimination

An Amazingly Detailed Script: Animal Development

How the Baby Came to Be: Human Reproduction

An Interactive Living World 1: Populations in Ecology

An Interactive Living World 2: Communities in Ecology

An Interactive Living World 3: Ecosystems and Biomes

Filters

A triglyceride contains fatty acid chains, whereas a phospholipid contains fatty acid chains.

An example of an important biological molecule that may contain the -NH₂ group is: