Question 1

Why does FADH2 result in fewer ATP than NADH + H+?

Accepted Answer

A)  FADH2 only contains one electron.
B)  FADH2 only contains one hydrogen ion.
C)  FADH2 drops its electrons off lower on the electron transport chain.
D)  FADH2 drops its electrons off higher on the electron transport chain.
E)  FADH2 drops its electrons off to oxygen.F) All of the above
G) A) and D)

Question 2

Glycolysis is linked to the citric acid cycle when oxygen is not available.

Accepted Answer

A) True 
 B)False

Question 3

How many NADH + H+ are produced by the citric acid cycle per turn?

Accepted Answer

A)  one
B)  two
C)  three
D)  four
E)  sixF) A) and D)
G) A) and E)

Question 4

Pyruvate can be converted to lactate instead of going to the preparatory reaction.Why does this occur?

Accepted Answer

A)  The cells need lactate to produce ATP.
B)  There is no sunlight.
C)  The cells doing the reaction are prokaryotes.
D)  Oxygen is not available.
E)  There is a shortage of glucose.F) A) and E)
G) A) and C)

Question 5

The largest number of ATP molecules is produced in which phase of cellular respiration?

Accepted Answer

A)  glycolysis
B)  preparation reaction
C)  citric acid cycle
D)  electron transport chain
E)  Calvin cycleF) A) and B)
G) A) and E)

Question 6

Write out the overall equation for cellular respiration.

Accepted Answer

C₆H₁₂O₆ + 6O₂ =...

Question 7

The molecule that is found at the beginning and end of the citric acid cycle is

Accepted Answer

A)  four-carbon molecule.
B)  pyruvate.
C)  lactate.
D)  glucose.
E)  RuBP.F) B) and E)
G) A) and E)

Question 8

What is the correct order of phases in cellular respiration?

Accepted Answer

A)  citric acid cycle,prep reaction,glycolysis,electron transport chain
B)  electron transport chain,glycolysis,prep reaction,citric acid cycle
C)  prep reaction,glycolysis,electron transport chain,citric acid cycle
D)  glycolysis,prep reaction,citric acid cycle,electron transport chain
E)  glycolysis,citric acid cycle,prep reaction,electron transport chainF) D) and E)
G) B) and C)

Question 9

You have discovered an organism that lives inside the gastrointestinal tract and does not contain a nucleus.Based on what you know of cellular respiration,how does it obtain its energy?

Accepted Answer

A)  photosynthesis
B)  glycolysis
C)  glycolysis and the citric acid cycle
D)  photosynthesis and the citric acid cycle
E)  glycolysis,the citric acid cycle,and the electron transport chainF) All of the above
G) B) and D) B

Question 10

Pyruvate is converted to a two-carbon acetyl group attached to coenzyme A (CoA) ,and CO2 is given off.This phase is called

Accepted Answer

A)  substrate-level ATP synthesis.
B)  the preparatory reaction.
C)  the electron transport chain.
D)  the citric acid cycle.
E)  fermentation.F) A) and E)
G) A) and D)

Question 11

The production of ATP as a result of an electrochemical gradient is called

Accepted Answer

A)  glycolysis.
B)  substrate-level phosphorylation.
C)  chemiosmosis.
D)  deamination.
E)  oxidative phosphorylation.F) C) and E)
G) C) and D)

Question 12

What are the input requirements of glycolysis?

Accepted Answer

A)  2 ATP,2 NAD+,glucose,and 4 ADP
B)  4 ATP,2 NAD+,glucose,and 4 ADP
C)  2 pyruvates,2 NADH,and 2 ADP
D)  2 ATP,4 NAD+,glucose,and 4 ADP
E)  2 ATP,2 NAD+,glucose,and 2 ADPF) D) and E)
G) C) and D)

Question 13

Why is ATP used as the energy molecule of the cell?

Accepted Answer

A)  ATP is easy to synthesize within the cell.
B)  ATP contains large amounts of energy so at least some of it can be used by the cell.
C)  ATP contains just about the amount of energy required for most cellular reactions.
D)  ATP is stored inside the cell where it is readily available whenever needed.
E)  ATP can be broken down into carbon dioxide and water.F) A) and B)
G) A) and C)

Question 14

Cellular respiration is an aerobic process.This means that it

Accepted Answer

A)  uses energy.
B)  produces energy.
C)  requires carbon dioxide.
D)  requires water.
E)  requires oxygen.F) C) and D)
G) None of the above E

Question 15

Why are two ATP needed to begin glycolysis?

Accepted Answer

A)  to activate the glucose
B)  to donate electrons to NAD+
C)  to compensate for the lack of oxygen
D)  to accept electrons from glucose
E)  to move the reaction into the mitochondriaF) C) and E)
G) A) and B)

Question 16

For the complete respiration of one molecule of glucose,the citric acid cycle must turn a total of

Accepted Answer

A)  one time.
B)  two times.
C)  three times.
D)  four times.
E)  six times.F) B) and D)
G) B) and E) B

Question 17

Why is fermentation essential to humans?

Accepted Answer

A)  It is the best reaction we can utilize to produce ATP.
B)  It produces lactate,which is essential for humans.
C)  It produces carbon dioxide,which is necessary for our cells.
D)  It generates the NAD+ we need for metabolism.
E)  It is essential when we need a rapid burst of energy.F) A) and E)
G) C) and D)

Question 18

If we developed a molecule that blocked the ATP channel protein,what would be the first immediate effect?

Accepted Answer

A)  accumulation of ATP in the mitochondrial matrix
B)  accumulation of NADH in the mitochondrial matrix
C)  no energy to pump hydrogen ions into the intermembrane space of a mitochondrion
D)  reversal of the hydrogen ion gradient
E)  immediate blockage of the cytochrome moleculesF) D) and E)
G) C) and E)

Question 19

Some desert organisms can live out their life without ever drinking liquid water.What phase(s) of cellular respiration could provide the organism with water?

Accepted Answer

A)  glycolysis
B)  citric acid cycle
C)  electron transport chain
D)  glycolysis and electron transport chain
E)  citric acid cycle and electron transport chainF) B) and E)
G) C) and D)

Question 20

Which of the following would not slow down the electron transport system's production of ATP?

Accepted Answer

A)  Limit the amount of oxygen available.
B)  Decrease use of ATP and thus reduce available ADP.
C)  Reduce synthesis of NAD+ and FAD.
D)  Add an NADH reductase inhibitor.
E)  Increase the pumping of hydrogen ions into the intermembrane space of the mitochondria.F) B) and C)
G) C) and D)

Exam 7: Cellular Respiration

Why does FADH2 result in fewer ATP than NADH + H+?

Correct AnswerverifiedShow Answer

Glycolysis is linked to the citric acid cycle when oxygen is not available.

Correct AnswerverifiedShow Answer

How many NADH + H+ are produced by the citric acid cycle per turn?

Correct AnswerverifiedShow Answer

Pyruvate can be converted to lactate instead of going to the preparatory reaction.Why does this occur?

Correct AnswerverifiedShow Answer

The largest number of ATP molecules is produced in which phase of cellular respiration?

Correct AnswerverifiedShow Answer

Write out the overall equation for cellular respiration.

Correct AnswerverifiedC6H12O6 + 6O2 =...View AnswerShow Answer

The molecule that is found at the beginning and end of the citric acid cycle is

Correct AnswerverifiedShow Answer

What is the correct order of phases in cellular respiration?

Correct AnswerverifiedShow Answer

You have discovered an organism that lives inside the gastrointestinal tract and does not contain a nucleus.Based on what you know of cellular respiration,how does it obtain its energy?

Correct AnswerverifiedB

Pyruvate is converted to a two-carbon acetyl group attached to coenzyme A (CoA) ,and CO2 is given off.This phase is called

Correct AnswerverifiedShow Answer

The production of ATP as a result of an electrochemical gradient is called

Correct AnswerverifiedShow Answer

What are the input requirements of glycolysis?

Correct AnswerverifiedShow Answer

Why is ATP used as the energy molecule of the cell?

Correct AnswerverifiedShow Answer

Cellular respiration is an aerobic process.This means that it

Correct AnswerverifiedE

Why are two ATP needed to begin glycolysis?

Correct AnswerverifiedShow Answer

For the complete respiration of one molecule of glucose,the citric acid cycle must turn a total of

Correct AnswerverifiedB

Why is fermentation essential to humans?

Correct AnswerverifiedShow Answer

If we developed a molecule that blocked the ATP channel protein,what would be the first immediate effect?

Correct AnswerverifiedShow Answer

Some desert organisms can live out their life without ever drinking liquid water.What phase(s) of cellular respiration could provide the organism with water?

Correct AnswerverifiedShow Answer

Which of the following would not slow down the electron transport system's production of ATP?

Correct AnswerverifiedShow Answer

Why does FADH₂ result in fewer ATP than NADH + H⁺?

Correct Answer
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How many NADH + H⁺ are produced by the citric acid cycle per turn?

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C₆H₁₂O₆ + 6O₂ =...
View Answer

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B

Pyruvate is converted to a two-carbon acetyl group attached to coenzyme A (CoA) ,and CO₂ is given off.This phase is called

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E

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B

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