Question 1

Given enough time, a ripped piece of paper will spontaneously repair itself.

Accepted Answer

A) True 
 B)False  False

Question 2

You have been given the job of searching for naturally occurring catalysts. All of the following were isolated from the environment. Which would be an example of a catalyst?

Accepted Answer

A)  a protein being converted into a glycoprotein by the addition of sugars 
B)  a protein converting glucose and fructose into sucrose without being changed itself 
C)  glucose and galactose binding to form lactose 
D)  the addition of a phosphate group to a protein increasing its rate of reaction. 
A)  a protein being converted into a glycoprotein by the addition of sugars 
B)  a protein converting glucose and fructose into sucrose without being changed itself 
C)  glucose and galactose binding to form lactose 
D)  the addition of a phosphate group to a protein increasing its rate of reaction. B

Question 3

People with high cholesterol levels often take drugs in an attempt to lower their cholesterol levels. One such drug is Lipitor. How does this drug work?

Accepted Answer

A)  It enhances the activity of enzymes that help break down cholesterol in the body. 
B)  It prevents cholesterol from the diet from being absorbed in the small intestine. 
C)  It acts as a competitive inhibitor by binding to the active site of enzymes that normally produce cholesterol. 
D)  It increases the activation energy of enzymes needed to produce cholesterol. 
A)  It enhances the activity of enzymes that help break down cholesterol in the body. 
B)  It prevents cholesterol from the diet from being absorbed in the small intestine. 
C)  It acts as a competitive inhibitor by binding to the active site of enzymes that normally produce cholesterol. 
D)  It increases the activation energy of enzymes needed to produce cholesterol. C

Question 4

Which of the following is exergonic?

Accepted Answer

A)  bonding fatty acids and glycerol together to form lipids 
B)  bonding sugars together to form glycogen 
C)  adding a phosphate group to ADP to form ATP 
D)  bonding amino acids together to form proteins 
E)  breaking bonds in starch to release glucose 
A)  bonding fatty acids and glycerol together to form lipids 
B)  bonding sugars together to form glycogen 
C)  adding a phosphate group to ADP to form ATP 
D)  bonding amino acids together to form proteins 
E)  breaking bonds in starch to release glucose

Question 5

Refer to the figure above and then answer the quesiton that follows.
-How many amino acids in an enzyme would typically be involved in binding a substrate in the active site?

Accepted Answer

A)  1-2 
B)  10-20 
C)  56 
D)  9-10 
E)  All of the amino acids in an enzyme are usually involved. 
A)  1-2 
B)  10-20 
C)  56 
D)  9-10 
E)  All of the amino acids in an enzyme are usually involved.

Question 6

Many meat tenderizer products contain an enzyme called papain that breaks down protein. How would adding the papain enzyme help tenderize meat?

Accepted Answer

Meat is very high in

Question 7

Cells, to drive endergonic reactions, can harvest the energy released during exergonic reactions.

Accepted Answer

A) True 
 B)False

Question 8

Which law of thermodynamics explains the fact that if you drop an egg, the shell will not spontaneously repair itself?

Accepted Answer

A)  the fourth law 
B)  the fifth law 
C)  the second law 
D)  the first law 
E)  the third law 
A)  the fourth law 
B)  the fifth law 
C)  the second law 
D)  the first law 
E)  the third law

Question 9

-Extreme changes in temperature, particularly heat, can denature proteins and enzymes. Why might this cause a problem?

Accepted Answer

A)  The denatured enzymes would speed up chemical reactions to a pace too fast for the cells. 
B)  The denatured enzymes would not function; thus, critical reactions would be unable to occur in the cell. 
C)  The denatured enzymes would not function; thus, negative feedback would be inhibited. 
D)  The denatured enzymes would not function; thus, the activation energy for reactions would be reduced. 
A)  The denatured enzymes would speed up chemical reactions to a pace too fast for the cells. 
B)  The denatured enzymes would not function; thus, critical reactions would be unable to occur in the cell. 
C)  The denatured enzymes would not function; thus, negative feedback would be inhibited. 
D)  The denatured enzymes would not function; thus, the activation energy for reactions would be reduced.

Question 10

An individual who does not properly produce chymotrypsin in the pancreas may have a problem digesting:

Accepted Answer

A)  carbohydrates. 
B)  simple sugars. 
C)  lipids. 
D)  proteins. 
A)  carbohydrates. 
B)  simple sugars. 
C)  lipids. 
D)  proteins.

Question 11

The process of metabolizing our food helps to keep our bodies warm. Where does the heat come from when we metabolize our food, and why?

Accepted Answer

No reaction is 100 percent eff

Question 12

Plants provide animals with which of the following?

Accepted Answer

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

Question 13

Refer to the figure above and then answer the quesiton that follows.
-Suppose someone had a hypothetical "sucrose intolerance. Based on what you know about lactose intolerance, what would this mean?

Accepted Answer

A)  The person is allergic to sucrose. 
B)  The person lacks the enzyme to break down sucrose in the small intestine. 
C)  The person's cells are unable to utilize sucrose. 
D)  The person's enzymes accelerate the breakdown of sucrose, overloading the blood with sugar. 
A)  The person is allergic to sucrose. 
B)  The person lacks the enzyme to break down sucrose in the small intestine. 
C)  The person's cells are unable to utilize sucrose. 
D)  The person's enzymes accelerate the breakdown of sucrose, overloading the blood with sugar.

Question 14

Something with a great amount of entropy is:

Accepted Answer

A)  very cold. 
B)  very hot. 
C)  very disorganized. 
D)  highly organized. 
E)  full of energy. 
A)  very cold. 
B)  very hot. 
C)  very disorganized. 
D)  highly organized. 
E)  full of energy.

Question 15

Individuals with the genetic disease phenylketonuria (PKU) lack a single enzyme called phenylalanine hydroxylase, which converts the amino acid phenylalanine to the amino acid tyrosine. If this conversion does not happen, phenylalanine builds up and becomes toxic to the central nervous system, causing serious problems for the individual. The management of this disease is to avoid phenylalanine by severely limiting the amount of protein in the diet. How would this help?

Accepted Answer

Because phenylalanine is an amino acid,

Question 16

When we metabolize our food, we produce heat that helps to keep us warm. Which of the following best describes why?

Accepted Answer

A)  Chewing is exothermic; therefore, energy is released in the form of heat when we eat food. 
B)  When we break down the sugars in our food, energy is directly released in the form of heat. 
C)  Producing ATP from ADP is exothermic; therefore, energy is released in the form of heat. 
D)  When we break down our food, the reactions are not 100 percent efficient; therefore, energy is lost as heat. 
A)  Chewing is exothermic; therefore, energy is released in the form of heat when we eat food. 
B)  When we break down the sugars in our food, energy is directly released in the form of heat. 
C)  Producing ATP from ADP is exothermic; therefore, energy is released in the form of heat. 
D)  When we break down our food, the reactions are not 100 percent efficient; therefore, energy is lost as heat.

Question 17

Explain the process of negative feedback and why it occurs.

Accepted Answer

Negative feedback occurs when enough pro

Question 18

Allosteric enzymes are enzymes that can:

Accepted Answer

A)  be regulated by the level of product in the environment. 
B)  produce product from substrate. 
C)  produce ATP. 
D)  use coenzymes. 
E)  carry out metabolism. 
A)  be regulated by the level of product in the environment. 
B)  produce product from substrate. 
C)  produce ATP. 
D)  use coenzymes. 
E)  carry out metabolism.

Question 19

Give an example from your own life of mechanical work, transport work, and synthetic work, and give an example of how your body gets the energy to perform each type of work.

Accepted Answer

After reading this section, st

Question 20

Give an example of a reaction from your life that requires the input of activation energy.

Accepted Answer

There are many examples, such

Exam 6: An Introduction to Energy

Given enough time, a ripped piece of paper will spontaneously repair itself.

You have been given the job of searching for naturally occurring catalysts. All of the following were isolated from the environment. Which would be an example of a catalyst?

People with high cholesterol levels often take drugs in an attempt to lower their cholesterol levels. One such drug is Lipitor. How does this drug work?

Which of the following is exergonic?

Refer to the figure above and then answer the quesiton that follows. -How many amino acids in an enzyme would typically be involved in binding a substrate in the active site?

Many meat tenderizer products contain an enzyme called papain that breaks down protein. How would adding the papain enzyme help tenderize meat?

Cells, to drive endergonic reactions, can harvest the energy released during exergonic reactions.

Which law of thermodynamics explains the fact that if you drop an egg, the shell will not spontaneously repair itself?

-Extreme changes in temperature, particularly heat, can denature proteins and enzymes. Why might this cause a problem?

An individual who does not properly produce chymotrypsin in the pancreas may have a problem digesting:

The process of metabolizing our food helps to keep our bodies warm. Where does the heat come from when we metabolize our food, and why?

Plants provide animals with which of the following?

Refer to the figure above and then answer the quesiton that follows. -Suppose someone had a hypothetical "sucrose intolerance. Based on what you know about lactose intolerance, what would this mean?

Something with a great amount of entropy is:

When we metabolize our food, we produce heat that helps to keep us warm. Which of the following best describes why?

Explain the process of negative feedback and why it occurs.

Allosteric enzymes are enzymes that can:

Give an example from your own life of mechanical work, transport work, and synthetic work, and give an example of how your body gets the energy to perform each type of work.

Give an example of a reaction from your life that requires the input of activation energy.

A Guide to the Natural World

Chemistry, Water and PH

Lifes Components: Biological Molecules

Lifes Home: The Cell

Lifes Border: The Plasma Membrane

Deriving Energy From Food

Photosynthesis

Genetics and Cell Division

Preparing for Sexual Reproduction: Meiosis

Mendel and His Discoveries

Chromosomes and Inheritance

Dna Structure and Replication

Transcription Translation and Regulation

Biotechnology

Charles Darwin, Evolutionary Thought, and the Evidence for Evolution

Microevolution

Macroevolution

The History of Life on Earth

The Evolution of Human Beings

The Diversity of Life 1

The Diversity of Life 2

The Diversity of Life 3

An Introduction to Flowering Plants

Form and Function in Flowering Plants

The Integumentary Skeletal and Muscular Systems

The Nervous and Endocrine System

The Immune System

Blood and Breath

Digestion, Nutrition and Elimination

Animal Development

Human Reproduction

Populations in Ecology

Communities in Ecology

Ecosystems and Biomes

Animal Behavior

Filters