Question 1

The enzyme that converts pyruvic acid into acetyl-CoA requires vitamin B1, also called thiamine. Vitamin B1 has to be taken in through the diet of an individual. At what phase would cellular respiration come to a halt without B1?

Accepted Answer

A)   glycolysis
B)   preparatory reaction
C)   citric acid cycle
D)   electron transport chain
E)   carbon fixationF) D) and E)
G) All of the above

Question 2

Why is it necessary for ATP to be used in the energy-investment phase of glycolysis?

Accepted Answer

A)   Adding the phosphate to the glucose molecule allows the later reactions that take place in the energy payoff phase to occur.
B)   Adding the phosphate to the glucose molecule breaks it into pyruvate.
C)   There is no purpose to adding the phosphate to the glucose; it just happens that way.
D)   When ATP is broken into adenosine, triglycerides, and phosphate, it supplies energy to produce more ATP later in oxidative phosphorylation.
E)   The energy that is released when ATP becomes ADP is harnessed and used to pump hydrogen ions across the mitochondrial membrane.F) C) and D)
G) A) and E)

Question 3

Energy is released from ATP when

Accepted Answer

A)   adenine bonds to an additional phosphate group forming ADP.
B)   ATP bonds to oxygen forcing the adenine 
A)   to be removed.
C)   ATP is exposed to sunlight, which forces the phosphate groups to be removed.
D)   a phosphate group is removed from ATP yielding ADP + P + energy.
E)   ATP bonds to carbon dioxide forcing a phosphate to be removed.F) C) and D)
G) B) and E)

Question 4

In the energy payoff phase of glycolysis, both ATP and NADH are formed. What purpose do each of these molecules serve in the cell?

Accepted Answer

A)   ATP acts as a way to break up glucose to form pyruvate, while NADH serves as an electron acceptor.
B)   ATP acts as a power source for the citric acid cycle, while NADH serves as energy to run the cell.
C)   ATP acts as a power source for performing cellular work, while NADH serves as an electron carrier to allow for greater ATP production.
D)   ATP acts as an electron acceptor, while NADH serves as a way to break up glucose to form pyruvate.
E)   ATP acts as a power source for performing cellular work, while NADH acts as a power source for photosynthesis.F) B) and C)
G) B) and E)

Question 5

When glucose is broken down to CO2 and H2O, ________ energy is released and converted into ________.

Accepted Answer

A)   chemical potential; ATP
B)   photosynthetic; ATP
C)   solar; NADH
D)   NADH; ATP
E)   chemical potential; NADHF) B) and E)
G) C) and D)

Question 6

In cellular respiration, most ATP are produced directly as a result of

Accepted Answer

A)   fermentation.
B)   the electron transport chain.
C)   the citric acid cycle.
D)   the preparatory stage.
E)   the Calvin cycle.F) D) and E)
G) B) and D)

Question 7

The functioning of an electron transport chain is analogous to

Accepted Answer

A)   playing tennis.
B)   a rock falling from a cliff.
C)   a person jumping from the top to the bottom of a flight of stairs in one jump.
D)   a person descending a flight of stairs one step at a time.
E)   a person jumping rope. High-energy electrons enter the electron transport chain by way of NADH and FADH2. Energy is captured through a series of reactions that release a small amount of energy each time. During these oxidation-reduction reactions, each of the carriers become reduced and then oxidized as electrons move down the system. As the pair of electrons is passed from carrier to carrier, energy is released in small amounts and captured for ATP production.F) None of the above
G) All of the above

Question 8

During hibernation the rate of cellular respiration in a mammal is typically less than half the rate measured when the mammal is not hibernating. This slowed cellular respiration is probably accompanied by which of the following?

Accepted Answer

A)   Unchanged pulse rate and reduced body temperature.
B)   Reduced pulse rate and reduced body temperature.
C)   Reduced pulse rate and increased body temperature.
D)   Unchanged pulse rate and increased body temperature.
E)   Unchanged pulse rate and unchanged body temperature.F) C) and E)
G) D) and E)

Question 9

As electrons are passed down the electron transport chain, the energy released is used immediately to

Accepted Answer

A)   form ATP.
B)   concentrate H+ in the intermembrane space.
C)   move phosphate groups to ATP synthase.
D)   release CO2 to the matrix.
E)   concentrate H+ in the cytoplasm of the cell.F) A) and B)
G) A) and C)

Question 10

A new organism is discovered which contains a super enzyme that requires no ATP to split glucose into pyruvate but cannot function if oxygen is present. What is this organism's net production of ATP from one molecule of glucose?

Accepted Answer

A)   2
B)   4
C)   38
D)   40
E)   42F) A) and B)
G) B) and C)

Question 11

The final acceptor for hydrogen ions in aerobic cellular respiration is

Accepted Answer

A)   oxygen.
B)   pyruvate.
C)   CoA.
D)   glucose.
E)   carbon dioxide.F) B) and C)
G) A) and E)

Question 12

As a result of glycolysis, there is a net gain of ________ ATPs.

Accepted Answer

A)   0
B)   2
C)   4
D)   36
E)   12F) A) and D)
G) A) and E)

Question 13

The number of ATP produced during aerobic cellular respiration from one glucose molecule is

Accepted Answer

A)   2-4.
B)   26-28.
C)   10-20.
D)   36-38.
E)   10-12.F) B) and C)
G) C) and D)

Question 14

What cellular process uses oxygen to break food down, producing ATP?

Accepted Answer

A)   photosynthesis
B)   oxidation/reduction reactions
C)   cellular respiration
D)   mitosis
E)   meiosisF) D) and E)
G) A) and E)

Question 15

What would happen if NAD+ were not available for cellular respiration?

Accepted Answer

A)   There would be a slight reduction in the number of ATP formed.
B)   There would be a great reduction in the number of ATP formed.
C)   There would be no effect on the number of ATP formed.
D)   Cellular respiration would not proceed.
E)   There would be an increase in ATP produced.F) C) and E)
G) All of the above

Question 16

What molecule most directly provides the energy you need for your muscles to contract?

Accepted Answer

A)   glucose
B)   ATP
C)   NADH
D)   ADP
E)   oxygenF) B) and E)
G) All of the above

Question 17

What is oxidation?

Accepted Answer

A)   addition of H+ ions to form molecules
B)   removal of H+ ions to form new molecules
C)   the addition of ATP to a molecule
D)   the production of ATP by the use of carbon dioxide
E)   oxygen productionF) A) and B)
G) A) and C)

Question 18

What organelle is used during the process of cellular respiration?

Accepted Answer

A)   cytoplasm
B)   mitochondria
C)   chloroplast
D)   ribosomes
E)   cell membraneF) D) and E)
G) B) and C)

Question 19

Glycolysis and the citric acid cycle are similar in that they both produce

Accepted Answer

A)   CO2.
B)   NADH.
C)   ATP.
D)   NADH and ATP.
E)   ADP.F) C) and D)
G) A) and D)

Question 20

The energy of the electrons passing along the electron transport chain is used to produce

Accepted Answer

A)   lactic acid.
B)   citric acid.
C)   alcohol.
D)   ADP.
E)   ATP.F) A) and D)
G) B) and C)

Exam 7: Energy for Cells

The functioning of an electron transport chain is analogous to

Correct AnswerverifiedShow Answer

The final acceptor for hydrogen ions in aerobic cellular respiration is

Correct AnswerverifiedShow Answer

The enzyme that converts pyruvic acid into acetyl-CoA requires vitamin B1, also called thiamine. Vitamin B1 has to be taken in through the diet of an individual. At what phase would cellular respiration come to a halt without B1?

Correct AnswerverifiedShow Answer

As electrons are passed down the electron transport chain, the energy released is used immediately to

Correct AnswerverifiedShow Answer

In the energy payoff phase of glycolysis, both ATP and NADH are formed. What purpose do each of these molecules serve in the cell?

Correct AnswerverifiedShow Answer

Energy is released from ATP when

Correct AnswerverifiedShow Answer

Glycolysis and the citric acid cycle are similar in that they both produce

Correct AnswerverifiedShow Answer

As a result of glycolysis, there is a net gain of ________ ATPs.

Correct AnswerverifiedShow Answer

What would happen if NAD+ were not available for cellular respiration?

Correct AnswerverifiedShow Answer

What organelle is used during the process of cellular respiration?

Correct AnswerverifiedShow Answer

What molecule most directly provides the energy you need for your muscles to contract?

Correct AnswerverifiedShow Answer

During hibernation the rate of cellular respiration in a mammal is typically less than half the rate measured when the mammal is not hibernating. This slowed cellular respiration is probably accompanied by which of the following?

Correct AnswerverifiedShow Answer

The energy of the electrons passing along the electron transport chain is used to produce

Correct AnswerverifiedShow Answer

In cellular respiration, most ATP are produced directly as a result of

Correct AnswerverifiedShow Answer

The number of ATP produced during aerobic cellular respiration from one glucose molecule is

Correct AnswerverifiedShow Answer

When glucose is broken down to CO2 and H2O, ________ energy is released and converted into ________.

Correct AnswerverifiedShow Answer

Why is it necessary for ATP to be used in the energy-investment phase of glycolysis?

Correct AnswerverifiedShow Answer

What is oxidation?

Correct AnswerverifiedShow Answer

A new organism is discovered which contains a super enzyme that requires no ATP to split glucose into pyruvate but cannot function if oxygen is present. What is this organism's net production of ATP from one molecule of glucose?

Correct AnswerverifiedShow Answer

What cellular process uses oxygen to break food down, producing ATP?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

The enzyme that converts pyruvic acid into acetyl-CoA requires vitamin B₁, also called thiamine. Vitamin B₁ has to be taken in through the diet of an individual. At what phase would cellular respiration come to a halt without B₁?

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

When glucose is broken down to CO₂ and H₂O, energy is released and converted into .

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified