Question 1

A molecule that has gained electrons has been ________.

Accepted Answer

The answer of A molecule that has gained electrons has...

Question 2

Human babies and animals adapted to the cold are able to maintain their body temperatures because of the presence of brown fat. The mitochondria in brown fat have a protein in them called thermogenin, which allows the flow of hydrogen ions back through the inner mitochondrial membrane (bypassing the ATP synthase). Based on this and your understanding of cellular respiration, propose a mechanism by which brown fat helps keep babies and other animals warm.

Accepted Answer

The hydrogen ion gradient stores energy,...

Question 3

Organisms exist that can survive using only glycolysis.

Accepted Answer

A) True 
 B)False

Question 4

The chemical equation that summarizes the process of cellular respiration is:

Accepted Answer

A)   C6H12O6 + 6CO2 + 36ADP + 36P → 6O2 + 6H2O + 36ATP
B)   6O2 + 6H2O + 36 ATP → C6H12O6 + O2 + 36ADP + 36P
C)   C6H12O6 + 6O2 + 36ATP → 6O2 + 6H2O + 36 ADP + 36P
D)   C6H12O6 + 6O2 + 36ADP + 36P → 6O2 + 6H2O + 36ATPE) All of the above
F) A) and B)

Question 5

A molecule that has lost electrons has been reduced.

Accepted Answer

A) True 
 B)False

Question 6

What does oxygen allow humans to do?

Accepted Answer

A)   breathe
B)   produce food
C)   digest food
D)   produce ATP from foodE) A) and B)
F) B) and D)

Question 7

Cyanide is a deadly poison that reacts with hemoglobin in our blood and prevents it from binding oxygen. Cyanide also binds to a molecule in the electron transport chain and blocks the flow of electrons down the chain. Explain why both these mechanisms will stop ATP synthesis.

Accepted Answer

Both mechanisms will stop the functionin...

Question 8

In order for a fat to be used for energy, it must first be broken down into:

Accepted Answer

A)   amino acids.
B)   glucose.
C)   fatty acids and sugars.
D)   fatty acids and glycerol.E) C) and D)
F) None of the above

Question 9

Which of the following statements concerning the electron transport chain is false?

Accepted Answer

A)   The final electron acceptor is oxygen.
B)   Each NADH yields three ATP molecules.
C)   Each FADH2 yields two ATP molecules.
D)   The electron transport chain will work whether oxygen is present or not.E) A) and B)
F) A) and C)

Question 10

The enzyme that creates ATP during electron transport is called:

Accepted Answer

A)   ADP phosphotransferase.
B)   ATP creatase.
C)   ATP polymerase.
D)   ATP synthase.E) B) and D)
F) A) and D)

Question 11

Why do biologists believe glycolysis evolved before the Krebs cycle and the electron transport chain?

Accepted Answer

A)   Glycolysis occurs in the mitochondria, which all organisms have.
B)   Glycolysis requires oxygen, which was one of the first elements on Earth.
C)   All organisms use glycolysis; not all use the Krebs cycle and the electron transport chain.
D)   Glycolysis is the most efficient at producing energy.E) All of the above
F) A) and C)

Question 12

When fats are metabolized by aerobic respiration, they are first split into ________ and ________ molecules.

Accepted Answer

fatty acid...

Question 13

Certain drugs prevent the formation of a hydrogen ion gradient across the inner mitochondrial membrane. What is the most likely consequence?

Accepted Answer

A)   Most ATP production will stop, and the cell will die.
B)   ATP production will increase.
C)   Glycolysis will stop.
D)   Fermentation will stop.E) B) and C)
F) A) and B)

Question 14

How many NADH molecules are created during one turn of the Krebs cycle? (Assume the Krebs cycle begins with one acetyl CoA molecule.)

Accepted Answer

A)   four
B)   six
C)   one
D)   three
E)   eightF) A) and C)
G) None of the above

Question 15

Mitochondria can be isolated from cells and their production of ATP measured. You want to identify the mechanism of ATP production, so you isolate mitochondria, remove the outer membrane, and place them in a high pH solution. What will happen to the ATP production if you start to lower the pH by adding hydrogen ions to the solution?

Accepted Answer

As hydrogen ion concentration ...

Question 16

The three main products of glycolysis are:

Accepted Answer

A)   ATP, NAD+, and CO2.
B)   ATP, pyruvic acid, and CO2.
C)   ATP, NADH, and CO2.
D)   ATP. NADH, and pyruvic acid.
E)   NAD+, pyruvic acid, and CO2.F) B) and C)
G) A) and D)

Question 17

The electron transport chain is used during which of the following processes?

Accepted Answer

A)   lactate fermentation
B)   aerobic cellular respiration
C)   glycolysis
D)   alcoholic fermentationE) None of the above
F) B) and C)

Question 18

Energy is required to link a phosphate group to ADP to make ATP. Where does the energy come from?

Accepted Answer

A)   vitamins
B)   enzymes
C)   food we eat
D)   breathingE) B) and C)
F) C) and D)

Question 19

When NADH donates its electrons to the electron transport chain, which of the following is true?

Accepted Answer

A)   NADH is reduced to NAD+.
B)   NADH is oxidized to NADH2.
C)   NADH is reduced to NADH2.
D)   NADH is oxidized to NAD+.E) A) and C)
F) None of the above

Question 20

Glycolysis occurs in the cell's:

Accepted Answer

A)   cytosol.
B)   mitochondria.
C)   Golgi apparatus.
D)   plasma membrane.
E)   nucleus.F) A) and B)
G) B) and D)

Exam 7: Vital Harvest: Deriving Energy From Food

In order for a fat to be used for energy, it must first be broken down into:

Correct Answer
verified

Cyanide is a deadly poison that reacts with hemoglobin in our blood and prevents it from binding oxygen. Cyanide also binds to a molecule in the electron transport chain and blocks the flow of electrons down the chain. Explain why both these mechanisms will stop ATP synthesis.

Correct Answer
verified
Both mechanisms will stop the functionin...
View Answer

Energy is required to link a phosphate group to ADP to make ATP. Where does the energy come from?

Correct Answer
verified

What does oxygen allow humans to do?

Correct Answer
verified

Glycolysis occurs in the cell's:

Correct Answer
verified

How many NADH molecules are created during one turn of the Krebs cycle? (Assume the Krebs cycle begins with one acetyl CoA molecule.)

Correct Answer
verified

Certain drugs prevent the formation of a hydrogen ion gradient across the inner mitochondrial membrane. What is the most likely consequence?

Correct Answer
verified

When NADH donates its electrons to the electron transport chain, which of the following is true?

Correct Answer
verified

Correct Answer
verified
The hydrogen ion gradient stores energy,...
View Answer

The three main products of glycolysis are:

Correct Answer
verified

Why do biologists believe glycolysis evolved before the Krebs cycle and the electron transport chain?

Correct Answer
verified

A molecule that has lost electrons has been reduced.

Correct Answer
verified

When fats are metabolized by aerobic respiration, they are first split into and molecules.

Correct Answer
verified
fatty acid...
View Answer

The electron transport chain is used during which of the following processes?

Correct Answer
verified

Correct Answer
verified
As hydrogen ion concentration ...
View Answer

A molecule that has gained electrons has been ________.

Correct Answer
verified

Organisms exist that can survive using only glycolysis.

Correct Answer
verified

Which of the following statements concerning the electron transport chain is false?

Correct Answer
verified

The chemical equation that summarizes the process of cellular respiration is:

Correct Answer
verified

The enzyme that creates ATP during electron transport is called:

Correct Answer
verified

Exam 7: Vital Harvest: Deriving Energy From Food

In order for a fat to be used for energy, it must first be broken down into:

Correct AnswerverifiedShow Answer

Cyanide is a deadly poison that reacts with hemoglobin in our blood and prevents it from binding oxygen. Cyanide also binds to a molecule in the electron transport chain and blocks the flow of electrons down the chain. Explain why both these mechanisms will stop ATP synthesis.

Correct AnswerverifiedBoth mechanisms will stop the functionin...View AnswerShow Answer

Energy is required to link a phosphate group to ADP to make ATP. Where does the energy come from?

Correct AnswerverifiedShow Answer

What does oxygen allow humans to do?

Correct AnswerverifiedShow Answer

Glycolysis occurs in the cell's:

Correct AnswerverifiedShow Answer

How many NADH molecules are created during one turn of the Krebs cycle? (Assume the Krebs cycle begins with one acetyl CoA molecule.)

Correct AnswerverifiedShow Answer

Certain drugs prevent the formation of a hydrogen ion gradient across the inner mitochondrial membrane. What is the most likely consequence?

Correct AnswerverifiedShow Answer

When NADH donates its electrons to the electron transport chain, which of the following is true?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedThe hydrogen ion gradient stores energy,...View AnswerShow Answer

The three main products of glycolysis are:

Correct AnswerverifiedShow Answer

Why do biologists believe glycolysis evolved before the Krebs cycle and the electron transport chain?

Correct AnswerverifiedShow Answer

A molecule that has lost electrons has been reduced.

Correct AnswerverifiedShow Answer

When fats are metabolized by aerobic respiration, they are first split into ________ and ________ molecules.

Correct Answerverifiedfatty acid...View AnswerShow Answer

The electron transport chain is used during which of the following processes?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedAs hydrogen ion concentration ...View AnswerShow Answer

A molecule that has gained electrons has been ________.

Correct AnswerverifiedShow Answer

Organisms exist that can survive using only glycolysis.

Correct AnswerverifiedShow Answer

Which of the following statements concerning the electron transport chain is false?

Correct AnswerverifiedShow Answer

The chemical equation that summarizes the process of cellular respiration is:

Correct AnswerverifiedShow Answer

The enzyme that creates ATP during electron transport is called:

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified
Both mechanisms will stop the functionin...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The hydrogen ion gradient stores energy,...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

When fats are metabolized by aerobic respiration, they are first split into and molecules.

Correct Answer
verified
fatty acid...
View Answer

Correct Answer
verified

Correct Answer
verified
As hydrogen ion concentration ...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified