Question 1

Which would be an example of a catalyst in action?

Accepted Answer

A)  a glycoprotein binding to a cell 
B)  a protein converting glucose and fructose into sucrose without being changed itself 
C)  glucose and galactose binding to form lactose 
D)  a phosphate group attached to a protein changing its shape 
A)  a glycoprotein binding to a cell 
B)  a protein converting glucose and fructose into sucrose without being changed itself 
C)  glucose and galactose binding to form lactose 
D)  a phosphate group attached to a protein changing its shape

Question 2

You have been asked to explain to a high school class the first law of thermodynamics and how this law affects the students' lives. Using your own words, describe the first law of thermodynamics, and give an example (other than the examples described in the chapter).

Accepted Answer

The first law of thermodynamics explains

Question 3

In a ________, multiple enzymes are working together in a multistep process.

Accepted Answer

A)  feedback loop 
B)  coupled reaction 
C)  allosteric pathway 
D)  metabolic pathway 
A)  feedback loop 
B)  coupled reaction 
C)  allosteric pathway 
D)  metabolic pathway

Question 4

Enzymes increase the activation energy needed for a particular reaction.

Accepted Answer

A) True 
 B)False

Question 5

What mechanism is used to finely tune enzyme activity according to the needs of the cell?

Accepted Answer

A)  competitive inhibition 
B)  coupled reactions 
C)  enzyme specificity 
D)  allosteric regulation 
A)  competitive inhibition 
B)  coupled reactions 
C)  enzyme specificity 
D)  allosteric regulation

Question 6

Some enzymes contain molecules in the active site that help facilitate chemical transformations. These molecules are called:

Accepted Answer

A)  coenzymes. 
B)  products. 
C)  substrates. 
D)  co-substrates. 
A)  coenzymes. 
B)  products. 
C)  substrates. 
D)  co-substrates.

Question 7

The structure of ATP includes each of the following except:

Accepted Answer

A)  the nitrogenous base adenosine. 
B)  the sugar ribose. 
C)  the nitrogenous base adenine. 
D)  phosphate groups. 
A)  the nitrogenous base adenosine. 
B)  the sugar ribose. 
C)  the nitrogenous base adenine. 
D)  phosphate groups.

Question 8

Endergonic reactions release energy.

Accepted Answer

A) True 
 B)False

Question 9

Plants provide animals with which of the following?

Accepted Answer

A)  food 
B)  oxygen 
C)  carbon dioxide 
D)  food and oxygen 
E)  food and carbon dioxide 
A)  food 
B)  oxygen 
C)  carbon dioxide 
D)  food and oxygen 
E)  food and carbon dioxide

Question 10

Refer to the figure below, and then answer the question that follows.  
-You have a job as an assistant in a morgue. You are startled (almost to death) when a corpse that recently came in suddenly sits up and remains very stiff. This muscle contraction and stiffness in a dead body is known as rigor mortis. Using your knowledge of the ADP/ATP cycle and its role in muscle contraction, explain why rigor mortis occurs.

Accepted Answer

Any remaining ATP in the muscles of the

Question 11

Which of the following is true of allosteric enzymes?

Accepted Answer

A)  Their activity can be reduced when the product binds the enzyme. 
B)  Their activity can be reduced when the substrate binds the enzyme. 
C)  Their coenzyme is removed when the product binds the enzyme. 
D)  Their activity can be increased by competitive inhibitors. 
A)  Their activity can be reduced when the product binds the enzyme. 
B)  Their activity can be reduced when the substrate binds the enzyme. 
C)  Their coenzyme is removed when the product binds the enzyme. 
D)  Their activity can be increased by competitive inhibitors.

Question 12

The function of chymotrypsin is to:

Accepted Answer

A)  break down proteins into amino acids. 
B)  synthesize glycogen. 
C)  synthesize proteins. 
D)  break down glycogen into glucose. 
A)  break down proteins into amino acids. 
B)  synthesize glycogen. 
C)  synthesize proteins. 
D)  break down glycogen into glucose.

Question 13

Where do substrates bind to enzymes?

Accepted Answer

A)  in the active site 
B)  anywhere 
C)  in the substrate groove 
D)  in the effector site 
A)  in the active site 
B)  anywhere 
C)  in the substrate groove 
D)  in the effector site

Question 14

The study of the thermodynamics of biology is known as ________.

Accepted Answer

The answer of The study of the thermodynamics of biology...

Question 15

Only eukaryotic cells depend on ATP.

Accepted Answer

A) True 
 B)False

Question 16

In allosteric enzyme regulation, which of the following is false about the molecules that can inhibit enzyme activity?

Accepted Answer

A)  They can cause the active site to have a poor shape for binding substrate. 
B)  They can increase substrate binding. 
C)  They cause a change in the enzyme's shape. 
D)  They can bind to a site other than the active site. 
A)  They can cause the active site to have a poor shape for binding substrate. 
B)  They can increase substrate binding. 
C)  They cause a change in the enzyme's shape. 
D)  They can bind to a site other than the active site.

Question 17

Coupled reactions are:

Accepted Answer

A)  reactions in which endergonic reactions obtain the energy to go forward from exergonic reactions. 
B)  reactions in which exergonic reactions obtain the energy to go forward from endergonic reactions. 
C)  any reactions that are accelerated by an enzyme. 
D)  reactions that lower the activation energy of another reaction. 
A)  reactions in which endergonic reactions obtain the energy to go forward from exergonic reactions. 
B)  reactions in which exergonic reactions obtain the energy to go forward from endergonic reactions. 
C)  any reactions that are accelerated by an enzyme. 
D)  reactions that lower the activation energy of another reaction.

Question 18

A ________ is a set of enzymatically controlled steps that results in the completion of a product or process in an organism.

Accepted Answer

The answer of A ________ is a set of enzymatically...

Question 19

It is possible for a cell to harvest 100 percent of the energy from a chemical reaction to produce movement.

Accepted Answer

A) True 
 B)False

Question 20

Refer to the figure below, and then answer the question that follows.  
-The figure above represents allosteric inhibition. Based on the figure, what could be done to allow the enzyme to function again?

Accepted Answer

A)  add more enzyme 
B)  add more substrate 
C)  remove some of the product 
D)  remove some of the substrate 
A)  add more enzyme 
B)  add more substrate 
C)  remove some of the product 
D)  remove some of the substrate

Exam 6: Lifes Mainspring: an Introduction to Energy

Which would be an example of a catalyst in action?

You have been asked to explain to a high school class the first law of thermodynamics and how this law affects the students' lives. Using your own words, describe the first law of thermodynamics, and give an example (other than the examples described in the chapter).

In a ________, multiple enzymes are working together in a multistep process.

Enzymes increase the activation energy needed for a particular reaction.

What mechanism is used to finely tune enzyme activity according to the needs of the cell?

Some enzymes contain molecules in the active site that help facilitate chemical transformations. These molecules are called:

The structure of ATP includes each of the following except:

Endergonic reactions release energy.

Plants provide animals with which of the following?

Which of the following is true of allosteric enzymes?

The function of chymotrypsin is to:

Where do substrates bind to enzymes?

The study of the thermodynamics of biology is known as ________.

Only eukaryotic cells depend on ATP.

In allosteric enzyme regulation, which of the following is false about the molecules that can inhibit enzyme activity?

Coupled reactions are:

A ________ is a set of enzymatically controlled steps that results in the completion of a product or process in an organism.

It is possible for a cell to harvest 100 percent of the energy from a chemical reaction to produce movement.

Refer to the figure below, and then answer the question that follows. -The figure above represents allosteric inhibition. Based on the figure, what could be done to allow the enzyme to function again?

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

Fundamental Building Blocks: Chemistry, Water, and Ph

Lifes Components: Biological Molecules

Lifes Home: the Cell

Lifes Border: the Plasma Membrane

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

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