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The three main products of glycolysis are:


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) C) and D)
G) B) and E)

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The electron transport chain occurs in the ________ of the mitochondria.

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The Krebs cycle must turn six times for each glucose molecule.

A) True
B) False

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The enzyme that creates ATP during electron transport is called:


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

E) B) and C)
F) All of the above

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Organisms exist that can survive using only glycolysis.

A) True
B) False

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What does oxygen allow humans to do?


A) breathe
B) produce food
C) digest food
D) produce ATP from food

E) C) and D)
F) A) and B)

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________ means "sugar splitting."

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How many NADH are produced in the Krebs cycle for each glucose molecule used?


A) one
B) three
C) six
D) eight

E) A) and B)
F) B) and C)

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


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) B) and C)
F) B) and D)

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Electrons lose energy as they pass down the electron transport chain.What is this energy used for?


A) to power hydrogen ion pumps
B) to link oxygen to hydrogen ions
C) to power water pumps
D) to directly power ATP synthase

E) B) and C)
F) A) and D)

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Refer to the figure below, and then answer the question that follows. Refer to the figure below, and then answer the question that follows.    -Which stage or stages of aerobic respiration require both NAD⁺ and ADP as reactants? A) glycolysis B) the Krebs cycle C) the electron transport chain D) the Krebs cycle and the electron transport chain E) glycolysis and the Krebs cycle -Which stage or stages of aerobic respiration require both NAD⁺ and ADP as reactants?


A) glycolysis
B) the Krebs cycle
C) the electron transport chain
D) the Krebs cycle and the electron transport chain
E) glycolysis and the Krebs cycle

F) C) and E)
G) B) and E)

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E

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


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) B) and D)
F) None of the above

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There is an energy investment step needed to get glycolysis started,requiring the use of ________ ATPs.


A) zero
B) four
C) two
D) three
E) one

F) A) and B)
G) C) and D)

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When glucose is the fuel source,what is the correct sequence of stages in cellular respiration?


A) glycolysis, Krebs cycle, electron transport
B) electron transport, Krebs cycle, glycolysis
C) Krebs cycle, glycolysis, electron transport
D) electron transport, glycolysis, Krebs cycle
E) Krebs cycle, electron transport, glycolysis

F) A) and B)
G) All of the above

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A

During cellular respiration,what molecule collects the majority of the electrons from the food that we eat?


A) CO₂
B) FAD⁺
C) NAD⁺
D) glucose
E) ATP

F) B) and C)
G) B) and D)

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C

During cellular respiration:


A) glucose is reduced and oxygen is oxidized.
B) glucose is oxidized and oxygen is reduced.
C) oxygen oxidizes glucose directly.
D) both glucose and oxygen get reduced.

E) A) and D)
F) B) and C)

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During glycolysis,a glucose molecule will be split into two,three-carbon ________ molecules.


A) acetyl CoA
B) pyruvic acid
C) ATP
D) oxaloacetatic acid

E) B) and C)
F) A) and C)

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Match the following.

Premises
The first molecule produced during the Krebs cycle
The last step of the Krebs cycle produces this
Combines with oxaloacetic acid in the first step of the Krebs cycle
Combines with pyruvic acid in an intermediate step
Carries electrons away from the Krebs cycle
A three-carbon molecule that gets shuttled into the mitochondria
Responses
citric acid
pyruvic acid
oxaloacetic acid
coenzyme A
acetyl CoA
NADH

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The first molecule produced during the Krebs cycle
The last step of the Krebs cycle produces this
Combines with oxaloacetic acid in the first step of the Krebs cycle
Combines with pyruvic acid in an intermediate step
Carries electrons away from the Krebs cycle
A three-carbon molecule that gets shuttled into the mitochondria

The Krebs cycle extracts most of the energy in a glucose molecule and stores it in:


A) pyruvic acid.
B) ATP.
C) CO₂.
D) NADH.
E) O₂.

F) A) and B)
G) A) and E)

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Adding phosphate to ADP to form ATP requires an input of energy.

A) True
B) False

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