Question 1

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

Question 2

Which molecules are the products of aerobic respiration?

Accepted Answer

A)  pyruvate and carbon dioxide 
B)  pyruvate and water 
C)  pyruvate and oxygen 
D)  lactate and carbon dioxide 
E)  carbon dioxide and water 
A)  pyruvate and carbon dioxide 
B)  pyruvate and water 
C)  pyruvate and oxygen 
D)  lactate and carbon dioxide 
E)  carbon dioxide and water

Question 3

Where does glycolysis take place within the cell?

Accepted Answer

A)  endoplasmic reticulum 
B)  nucleus 
C)  mitochondrial matrix 
D)  mitochondrial membrane 
E)  cytoplasm 
A)  endoplasmic reticulum 
B)  nucleus 
C)  mitochondrial matrix 
D)  mitochondrial membrane 
E)  cytoplasm

Question 4

Which of the following statement(s) about fermentation is/are true?

Accepted Answer

A)  Fermentation can produce alcohol. 
B)  Fermentation does not require oxygen. 
C)  Fermentation can produce lactic acid. 
D)  Fermentation produces a net of two ATP molecules. 
E)  All the answer choices are true statements about fermentation. 
A)  Fermentation can produce alcohol. 
B)  Fermentation does not require oxygen. 
C)  Fermentation can produce lactic acid. 
D)  Fermentation produces a net of two ATP molecules. 
E)  All the answer choices are true statements about fermentation.

Question 5

Each turn of of the citric acid cycle directly produces how many ATP?

Accepted Answer

A)  1 
B)  2 
C)  12 
D)  14 
E)  16 
A)  1 
B)  2 
C)  12 
D)  14 
E)  16

Question 6

Which of the following reactions is part of the cellular respiration pathway?

Accepted Answer

A)  glycolysis 
B)  citric acid cycle 
C)  electron transport chain 
D)  preparatory reaction (prep) 
E)  All of the answer choices are part of the cellular respiration pathway. 
A)  glycolysis 
B)  citric acid cycle 
C)  electron transport chain 
D)  preparatory reaction (prep) 
E)  All of the answer choices are part of the cellular respiration pathway.

Question 7

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

Question 8

The final acceptor for electrons in aerobic cellular respiration is

Accepted Answer

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

Question 9

The carriers of the electron transport chain are located

Accepted Answer

A)  in the matrix of the mitochondria. 
B)  on the outer mitochondrial membrane. 
C)  on the cristae of the mitochondria. 
D)  within the intermembrane space. 
E)  within the cytoplasm of the cell. 
A)  in the matrix of the mitochondria. 
B)  on the outer mitochondrial membrane. 
C)  on the cristae of the mitochondria. 
D)  within the intermembrane space. 
E)  within the cytoplasm of the cell.

Question 10

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 chain 
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 chain

Question 11

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. 
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.

Question 12

The ATP synthase complex is located in the

Accepted Answer

A)  cytoplasm outside the mitochondria. 
B)  matrix inside the mitochondria. 
C)  cristae of the mitochondria. 
D)  outer membrane of the mitochondria. 
E)  plasma membrane of the cell. 
A)  cytoplasm outside the mitochondria. 
B)  matrix inside the mitochondria. 
C)  cristae of the mitochondria. 
D)  outer membrane of the mitochondria. 
E)  plasma membrane of the cell.

Question 13

The final product of glycolysis is carbon dioxide.

Accepted Answer

A) True 
 B)False

Question 14

How many molecules are formed from the cleavage of glucose during the first step of glycolysis? How many carbons are found in the resulting molecules?

Accepted Answer

A)  6 molecules, each with 2 carbons 
B)  4 molecules, each with 3 carbons 
C)  3 molecules, each with 4 carbons 
D)  2 molecules, each with 3 carbons 
E)  3 molecules, each with 2 carbons 
A)  6 molecules, each with 2 carbons 
B)  4 molecules, each with 3 carbons 
C)  3 molecules, each with 4 carbons 
D)  2 molecules, each with 3 carbons 
E)  3 molecules, each with 2 carbons

Question 15

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

Question 16

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 molecules 
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 molecules

Question 17

Muscles undergo fermentation when no

Accepted Answer

A)  oxygen is available. 
B)  water is available. 
C)  carbon dioxide is available. 
D)  ATP is available. 
E)  pyruvate is available. 
A)  oxygen is available. 
B)  water is available. 
C)  carbon dioxide is available. 
D)  ATP is available. 
E)  pyruvate is available.

Question 18

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. 
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.

Question 19

What are the input requirements of glycolysis?

Accepted Answer

A)  2 ATP, 2 NAD+, glucose, and 2 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 
A)  2 ATP, 2 NAD+, glucose, and 2 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

Question 20

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

Accepted Answer

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

Exam 7: Cellular Respiration

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

Which molecules are the products of aerobic respiration?

Where does glycolysis take place within the cell?

Which of the following statement(s) about fermentation is/are true?

Each turn of of the citric acid cycle directly produces how many ATP?

Which of the following reactions is part of the cellular respiration pathway?

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

The final acceptor for electrons in aerobic cellular respiration is

The carriers of the electron transport chain are located

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?

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

The ATP synthase complex is located in the

The final product of glycolysis is carbon dioxide.

How many molecules are formed from the cleavage of glucose during the first step of glycolysis? How many carbons are found in the resulting molecules?

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?

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

Muscles undergo fermentation when no

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

What are the input requirements of glycolysis?

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

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

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

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