Aerobic and Anaerobic Respiration

What is consumed in aerobic respiration?

• Oxygen

• Nitrogen

• Carbon Dioxide

• Water

• Leaves

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The primary purpose of cellular respiration in living organisms is to…

• Remove excess carbon dioxide from the cells.

• Create water by combining Oxygen and Hydrogen ions.

• Produce biologically useful energy in the form of ATP

• Produce molecules that can be used in the electron transport system.

• Create larger complex molecules such as carbohydrates, proteins, and Lipids

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The products of glycolysis include two pyruvate molecules and…

• Two molecules of oxygen

• Two net molecules of ATP

• One molecule of glucose

• Four ATP and two molecules of NADH

• Two molecules of NADH and two ATP

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Fermentation is an anaerobic process that recycles NAD+ from the NADH that is produced in glycolysis. The conversion of NADH to NAD+ is critical, as it allows glycolysis to continue to change glucose to pyruvate.

If oxygen is not present in sufficient quality, pyruvate molecules are converted into…

• Amino Acids or Fatty Acids

• Carbon Dioxide and Water

• CO2 or O2

• Ethanol or Lactic Acid

• acetyl-CoA and citric acid

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Prior to entering the Krebs cycle, each pyruvate molecule loses electrons, hydrogen ions, and a carbon, forming an energy rich molecule of…

• NAD+

• NADH

• FADH2

• CO2

• acetyl-CoA

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What is the NADH and FADH2 formed in the Krebs Cycle primary function?

• Remove the waste product CO2 from the system.

• Transfer electrons to the electron transport chain

• Provide the energy to synthesize acetyl-CoA

• Catalyze the production of ATP from ADP

• Facilitate the production of water by combining hydrogen ions with O2

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After the Krebs Cycle only a small portion of the energy of glucose has been converted. At this point what is the majority of usable energy is contained in?

• NADH and FADH2

• Pyruvate

• Acetyl-CoA

• CO2

• Citric Acid

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How do fermentation reactions contribute to the continued production of ATP in the absence of oxygen?

• Splitting carbon dioxide and releasing additional oxygen.

• Moving acetyl-CoA molecules to the Krebs cycle.

• Recycling NADH molecules to NAD+ molecules.

• Producing enzymes that convert ADP to ATP

• Breaking down ethanol or lactic acid to carbon dioxide and water.

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Which of the following represents a plausible pathway of electrons through the process of cellular respiration?

• Glucose >>> NADH >>> Acetyl-CoA >>> ETC >>> Carbon Dioxide

• Glucose >>> NADH >>> ETC >>> Acetyl-CoA >>> Oxygen

• Glucose >>> Pyruvate >>> ETC >>> NADH >>> Acetyl-CoA

• Glucose >>> NADH >>> Acetyl-CoA >>> ETC >>> Carbon Dioxide

• Glucose >>> Carbon Dioxide >>> FADH2 >>> ETC >>> Acetyl-CoA

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Cellular respiration uses one molecule of glucose to produce?

• 26-28 ATP

• NADH

• 2-4 ATP

• CO2

• 30-32 ATP

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