Question 1

In aerobic respiration, chemiosmotic generation of ATP is driven by:

Accepted Answer

A)  Pi transfer through the plasma membrane.
B)  the Na+/K+ pump.
C)  a difference in H+ concentration on the two sides of the inner mitochondrial membrane.
D)  osmosis of macromolecules.E) A) and B)
F) A) and C)

Question 2

Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?

Accepted Answer

A)  To generate and maintain the proton gradient essential for ATP production.
B)  To separate the ATP from the ADP.
C)  Because electrons cannot float in the matrix.
D)  Because NADH cannot localize to the mitochondrial matrix.E) C) and D)
F) All of the above

Question 3

Glucose is not our only food source, nor the only one we can utilize in our bodies to generate energy.Other primary sources of energy include other sugars, proteins, and fats.What metabolic intermediate are fats primarily converted into?

Accepted Answer

A)  Pyruvate
B)  Acetyl-CoA
C)  Krebs cycle intermediates
D)  Electron transport chain componentsE) B) and D)
F) All of the above

Question 4

Cardiac muscle cells need to generate significant amounts of ATP to allow for constant contractile activity.As a result, they primarily depend upon beta-oxidation of fatty acids, which has a higher energy yield than the catabolism of glucose.What would be the ATP yield for beta-oxidation of a hypothetical 10-carbon fatty acid?

Accepted Answer

A)  32 ATP
B)  35 ATP
C)  50 ATP
D)  62 ATPE) B) and C)
F) A) and D)

Question 5

What would be the ATP yield for a molecule that is catabolized to form one molecule of pyruvate in a eukaryotic cell?

Accepted Answer

A)  10 ATP
B)  12.5 ATP
C)  25 ATP
D)  30 ATPE) A) and C)
F) C) and D)

Question 6

It is thought that the oldest stage of cellular respiration from an evolutionary perspective is

Accepted Answer

A)  the krebs cycle.
B)  the electron transport chain.
C)  fermentation.
D)  glycolysis.E) B) and C)
F) None of the above

Question 7

Why is the energy generated from the catabolism of sugars and other macromolecules ultimately harnessed to generate ATP?

Accepted Answer

A)  ATP can be used by cells to drive endergonic reactions
B)  ATP can be used to make RNA, which is an energy storage molecule in the cell
C)  ATP synthesis is an exergonic reaction
D)  ATP is required to generate the proton gradient in the intermembrane space of mitochondriaE) B) and C)
F) A) and D)

Question 8

When oxygen is unavailable during heavy exercise what process do muscle cells use for energy generation?

Accepted Answer

A)  Glycolysis coupled with alcohol fermentation
B)  Anaerobic respiration
C)  Aerobic respiration
D)  Glycolysis coupled with lactate fermentationE) B) and D)
F) A) and B)

Question 9

One way to generate acetyl-CoA is to convert pyruvate into acetyl-CoA by stripping off a CO2 molecule.The removal of CO2 is referred to as what type of reaction?

Accepted Answer

A)  Decarboxylation
B)  Glycolytic
C)  Carboxylation
D)  AcetylationE) A) and B)
F) B) and C)

Question 10

Organisms that depend on the energy stored in chemical bonds by other organisms for their food energy are called ____________.

Accepted Answer

A)  Autotrophs
B)  Heterotrophs
C)  Oligotrophs
D)  ChemotrophsE) All of the above
F) A) and C)

Question 11

How many oxidation reactions occur during the Krebs cycle?rev: 02_07_2014_QC_44516

Accepted Answer

A)  1
B)  2
C)  4
D)  6E) A) and B)
F) None of the above

Question 12

Your friend is having difficulty keeping track of the energy flow from glucose through glycolysis, the Krebs cycle and electron transport.Your best advice would be to

Accepted Answer

A)  follow ATP production.
B)  follow the protons.
C)  follow NAD+ production.
D)  follow the electrons.E) B) and C)
F) C) and D)

Question 13

What aspect of cellular respiration occurs in the cytoplasm in eukaryotic cells?

Accepted Answer

A)  Glycolysis
B)  Pyruvate oxidation
C)  The Krebs cycle
D)  The electron transport chainE) A) and B)
F) B) and C)

Question 14

What are the products of one turn of the Krebs cycle?

Accepted Answer

A)  1 CO2, 2 NADH, 1 FADH2, 1 ATP
B)  2 CO2, 3 NADH, 1 FADH2, 1 ATP
C)  2 CO2, 6 NADH, 2 FADH2, 2 ATP
D)  4 CO2, 6 NADH, 2 FADH2, 2 ATPE) B) and C)
F) None of the above

Question 15

What is the net number of ATP generated directly during glycolysis per molecule of glucose?

Accepted Answer

A)  0
B)  2
C)  4
D)  6E) B) and D)
F) All of the above

Exam 7: How Cells Harvest Energy

Organisms that depend on the energy stored in chemical bonds by other organisms for their food energy are called ____________.

Correct Answer
verified

How many oxidation reactions occur during the Krebs cycle?rev: 02_07_2014_QC_44516

Correct Answer
verified

What is the net number of ATP generated directly during glycolysis per molecule of glucose?

Correct Answer
verified

Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?

Correct Answer
verified

One way to generate acetyl-CoA is to convert pyruvate into acetyl-CoA by stripping off a CO₂ molecule.The removal of CO₂ is referred to as what type of reaction?

Correct Answer
verified

In aerobic respiration, chemiosmotic generation of ATP is driven by:

Correct Answer
verified

What are the products of one turn of the Krebs cycle?

Correct Answer
verified

What aspect of cellular respiration occurs in the cytoplasm in eukaryotic cells?

Correct Answer
verified

Correct Answer
verified

Why is the energy generated from the catabolism of sugars and other macromolecules ultimately harnessed to generate ATP?

Correct Answer
verified

What would be the ATP yield for a molecule that is catabolized to form one molecule of pyruvate in a eukaryotic cell?

Correct Answer
verified

Your friend is having difficulty keeping track of the energy flow from glucose through glycolysis, the Krebs cycle and electron transport.Your best advice would be to

Correct Answer
verified

When oxygen is unavailable during heavy exercise what process do muscle cells use for energy generation?

Correct Answer
verified

It is thought that the oldest stage of cellular respiration from an evolutionary perspective is

Correct Answer
verified

Glucose is not our only food source, nor the only one we can utilize in our bodies to generate energy.Other primary sources of energy include other sugars, proteins, and fats.What metabolic intermediate are fats primarily converted into?

Correct Answer
verified

Exam 7: How Cells Harvest Energy

Organisms that depend on the energy stored in chemical bonds by other organisms for their food energy are called ____________.

Correct AnswerverifiedShow Answer

How many oxidation reactions occur during the Krebs cycle?rev: 02_07_2014_QC_44516

Correct AnswerverifiedShow Answer

What is the net number of ATP generated directly during glycolysis per molecule of glucose?

Correct AnswerverifiedShow Answer

Why are the components of the electron transport chain embedded in the inner mitochondrial membrane rather than floating freely in the cytoplasm of mitochondrial matrix?

Correct AnswerverifiedShow Answer

One way to generate acetyl-CoA is to convert pyruvate into acetyl-CoA by stripping off a CO2 molecule.The removal of CO2 is referred to as what type of reaction?

Correct AnswerverifiedShow Answer

In aerobic respiration, chemiosmotic generation of ATP is driven by:

Correct AnswerverifiedShow Answer

What are the products of one turn of the Krebs cycle?

Correct AnswerverifiedShow Answer

What aspect of cellular respiration occurs in the cytoplasm in eukaryotic cells?

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

Why is the energy generated from the catabolism of sugars and other macromolecules ultimately harnessed to generate ATP?

Correct AnswerverifiedShow Answer

What would be the ATP yield for a molecule that is catabolized to form one molecule of pyruvate in a eukaryotic cell?

Correct AnswerverifiedShow Answer

Your friend is having difficulty keeping track of the energy flow from glucose through glycolysis, the Krebs cycle and electron transport.Your best advice would be to

Correct AnswerverifiedShow Answer

When oxygen is unavailable during heavy exercise what process do muscle cells use for energy generation?

Correct AnswerverifiedShow Answer

It is thought that the oldest stage of cellular respiration from an evolutionary perspective is

Correct AnswerverifiedShow Answer

Glucose is not our only food source, nor the only one we can utilize in our bodies to generate energy.Other primary sources of energy include other sugars, proteins, and fats.What metabolic intermediate are fats primarily converted into?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

One way to generate acetyl-CoA is to convert pyruvate into acetyl-CoA by stripping off a CO₂ molecule.The removal of CO₂ is referred to as what type of reaction?

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