Question 1

ADP stores energy in its chemical bonds and is able to use that energy for work in the cell. True or False?

Accepted Answer

A) True 
 B)False

Question 2

In cells, endergonic reactions are often coupled with enzymatic reactions that store energy. True or False?

Accepted Answer

A) True 
 B)False

Question 3

In chemical reactions, ________ reactions release energy and ________ reactions require an input of energy.

Accepted Answer

exergonic;...

Question 4

Which of the enzymes shown must occur in the gastric region (stomach)of the gastrointestinal tract?

Accepted Answer

The answer of Which of the enzymes shown must occur...

Question 5

Activation energy is necessary for all ________ reactions.

Accepted Answer

A)  exergonic
B)  endergonic
C)  coupled
D)  chemical

Question 6

The burning of sugar is an example of an endergonic reaction, and photosynthesis is an example of an exergonic reaction. True or False?

Accepted Answer

A) True 
 B)False

Question 7

A "high-energy" bond in an ATP molecule is located between:

Accepted Answer

A)  adenine and ribose.
B)  two phosphate groups.
C)  ribose and the first phosphate group.
D)  adenine and the first phosphate group.

Question 8

Sulfa antibiotics damage bacteria by affecting a certain bacterial enzyme. The sulfa antibiotic looks similar to a substrate normally required by the bacterial cells to live. The sulfa antibiotic occupies the active site of the required enzyme and blocks entry of its normal substrate. This prevents the bacteria from making nucleotides that are required for their reproduction and survival. Based on this information, the action of sulfa antibiotics is an example of:

Accepted Answer

A)  electron carriers.
B)  competitive inhibition.
C)  denaturing of proteins.
D)  activation energy.

Question 9

The photosynthetic reaction is considered to be an endergonic reaction. True or False?

Accepted Answer

A) True 
 B)False

Question 10

Which of the following has the greatest amount of kinetic energy?

Accepted Answer

A)  a tank of gasoline
B)  a moving car
C)  a hot car engine
D)  the cool air surrounding the car engine
E)  an unlit firecracker

Question 11

Most reactions in the body occur too slowly to sustain life. This is because:

Accepted Answer

A)  all reactions in the body are endergonic.
B)  many reactions require large inputs of activation energy.
C)  no catalysts are present in body cells.
D)  most biological catalysts are not active at body temperature (37°
C)  .
E)  there is not enough ATP in body cells.

Question 12

Animals have enzymes that break apart starch molecules but not cellulose, despite the fact that both are made up of glucose subunits. Which enzyme characteristic BEST explains this?

Accepted Answer

A)  Enzyme activity is regulated.
B)  Enzymes usually speed up chemical reactions.
C)  Enzymes are not permanently changed by the reactions they promote.
D)  Enzymes are highly specific.
E)  All enzymes are proteins.

Question 13

Kinetic energy is like sitting at the top of a hill, and potential energy is like coasting down that hill on your bike. True or False?

Accepted Answer

A) True 
 B)False

Question 14

Preservatives such as citric acid are added to foods to interfere with bacterial growth. This creates an acidic pH in the food. Why does this affect the bacteria that are present?

Accepted Answer

A)  An acidic environment encourages endergonic reactions in the bacterial cells.
B)  An acidic environment increases the activation energy more quickly in bacteria.
C)  An acidic environment causes bacterial enzymes to fail or work less efficiently.
D)  An acidic environment causes the bacteria to grow more rapidly.

Question 15

Briefly describe how ATP acts as an energy carrier in cells.

Accepted Answer

ATP stores energy in its chemi...

Question 16

How is it possible for living organisms to comply with the second law of thermodynamics?

Accepted Answer

A)  Chemical reactions inside cells mostly cause an increase in high-level energy.
B)  Living organisms are totally isolated systems that are not subject to the laws of physics.
C)  Sunlight functions as an ultimate source of energy for most forms of life on Earth.
D)  Living organisms are unique in that they do not require energy for survival.
E)  Organisms are able to function efficiently on heat energy alone.

Question 17

Imagine you are conducting an experiment on a yeast enzyme known as sucrase. This enzyme is used by yeast cells to break down sucrose into glucose and fructose. What type of reaction is this?

Accepted Answer

A)  metergonic
B)  exergonic
C)  endergonic
D)  spontaneous

Question 18

Why is photosynthesis a coupled reaction?

Accepted Answer

A)  The exergonic reaction occurs in the plant, and the endergonic reaction occurs in the soil.
B)  The exergonic reaction occurs in the plant, and the endergonic reaction occurs in the sun.
C)  Photosynthesis requires a couple of reactants: carbon dioxide and water.
D)  An exergonic reaction occurs in the sun, and an endergonic reaction occurs in the plant.
E)  Sunlight energy enters a plant and is ultimately lost as heat.

Question 19

What is a simple definition of energy, from a biological perspective? Give some examples of how energy is used in a cell.

Accepted Answer

Energy is the ability of a cel...

Question 20

Which of the following functions as a biological catalyst?

Accepted Answer

A)  energy carrier molecule
B)  amino acid
C)  enzyme
D)  substrate
E)  steroid

Exam 6: Energy Flow in the Life of a Cell

In chemical reactions, reactions release energy and reactions require an input of energy.

Correct Answer
verified
exergonic;...
View Answer

ADP stores energy in its chemical bonds and is able to use that energy for work in the cell. True or False?

Correct Answer
verified

Why is photosynthesis a coupled reaction?

Correct Answer
verified

A "high-energy" bond in an ATP molecule is located between:

Correct Answer
verified

What is a simple definition of energy, from a biological perspective? Give some examples of how energy is used in a cell.

Correct Answer
verified
Energy is the ability of a cel...
View Answer

Briefly describe how ATP acts as an energy carrier in cells.

Correct Answer
verified
ATP stores energy in its chemi...
View Answer

How is it possible for living organisms to comply with the second law of thermodynamics?

Correct Answer
verified

Kinetic energy is like sitting at the top of a hill, and potential energy is like coasting down that hill on your bike. True or False?

Correct Answer
verified

In cells, endergonic reactions are often coupled with enzymatic reactions that store energy. True or False?

Correct Answer
verified

Correct Answer
verified

Which of the following functions as a biological catalyst?

Correct Answer
verified

Activation energy is necessary for all ________ reactions.

Correct Answer
verified

The burning of sugar is an example of an endergonic reaction, and photosynthesis is an example of an exergonic reaction. True or False?

Correct Answer
verified

Imagine you are conducting an experiment on a yeast enzyme known as sucrase. This enzyme is used by yeast cells to break down sucrose into glucose and fructose. What type of reaction is this?

Correct Answer
verified

The photosynthetic reaction is considered to be an endergonic reaction. True or False?

Correct Answer
verified

Animals have enzymes that break apart starch molecules but not cellulose, despite the fact that both are made up of glucose subunits. Which enzyme characteristic BEST explains this?

Correct Answer
verified

Which of the following has the greatest amount of kinetic energy?

Correct Answer
verified

Most reactions in the body occur too slowly to sustain life. This is because:

Correct Answer
verified

Preservatives such as citric acid are added to foods to interfere with bacterial growth. This creates an acidic pH in the food. Why does this affect the bacteria that are present?

Correct Answer
verified

Which of the enzymes shown must occur in the gastric region (stomach)of the gastrointestinal tract?

Correct Answer
verified

Exam 6: Energy Flow in the Life of a Cell

In chemical reactions, ________ reactions release energy and ________ reactions require an input of energy.

Correct Answerverifiedexergonic;...View AnswerShow Answer

ADP stores energy in its chemical bonds and is able to use that energy for work in the cell. True or False?

Correct AnswerverifiedShow Answer

Why is photosynthesis a coupled reaction?

Correct AnswerverifiedShow Answer

A "high-energy" bond in an ATP molecule is located between:

Correct AnswerverifiedShow Answer

What is a simple definition of energy, from a biological perspective? Give some examples of how energy is used in a cell.

Correct AnswerverifiedEnergy is the ability of a cel...View AnswerShow Answer

Briefly describe how ATP acts as an energy carrier in cells.

Correct AnswerverifiedATP stores energy in its chemi...View AnswerShow Answer

How is it possible for living organisms to comply with the second law of thermodynamics?

Correct AnswerverifiedShow Answer

Kinetic energy is like sitting at the top of a hill, and potential energy is like coasting down that hill on your bike. True or False?

Correct AnswerverifiedShow Answer

In cells, endergonic reactions are often coupled with enzymatic reactions that store energy. True or False?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Which of the following functions as a biological catalyst?

Correct AnswerverifiedShow Answer

Activation energy is necessary for all ________ reactions.

Correct AnswerverifiedShow Answer

The burning of sugar is an example of an endergonic reaction, and photosynthesis is an example of an exergonic reaction. True or False?

Correct AnswerverifiedShow Answer

Imagine you are conducting an experiment on a yeast enzyme known as sucrase. This enzyme is used by yeast cells to break down sucrose into glucose and fructose. What type of reaction is this?

Correct AnswerverifiedShow Answer

The photosynthetic reaction is considered to be an endergonic reaction. True or False?

Correct AnswerverifiedShow Answer

Animals have enzymes that break apart starch molecules but not cellulose, despite the fact that both are made up of glucose subunits. Which enzyme characteristic BEST explains this?

Correct AnswerverifiedShow Answer

Which of the following has the greatest amount of kinetic energy?

Correct AnswerverifiedShow Answer

Most reactions in the body occur too slowly to sustain life. This is because:

Correct AnswerverifiedShow Answer

Preservatives such as citric acid are added to foods to interfere with bacterial growth. This creates an acidic pH in the food. Why does this affect the bacteria that are present?

Correct AnswerverifiedShow Answer

Which of the enzymes shown must occur in the gastric region (stomach)of the gastrointestinal tract?

Correct AnswerverifiedShow Answer

In chemical reactions, reactions release energy and reactions require an input of energy.

Correct Answer
verified
exergonic;...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Energy is the ability of a cel...
View Answer

Correct Answer
verified
ATP stores energy in its chemi...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified