energetics review

What is the correct chemical equation for Cellular Respiration?

• C6H12O6 (Glucose) + H2O (Water) -----> CO2 (Carbon Dioxide) + H2O (Water) + ATP

• C6H12O6 (Glucose) + O2 (Oxygen) -----> CO2 (Carbon Dioxide) + H2O (Water) + ATP

• C6H12O6 (Glucose) + O2 (Oxygen) -----> CO2 (Carbon Dioxide) + H2O (Water) + ADP

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Many different chemical reactions occur during cellular respiration. It is a process that requires certain resources to get started and in turn it produces resources when it is finished. With all of that being said, why do organisms want to perform cellular respiration? What is the main purpose?

• To make H2O from CO2

• To harvest energy from food

• To create much needed O2

• To create glucose

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During which phase of cellular respiration is the most ATP harvested?

• Glycolysis

• Krebs Cycle

• Electron Transport Chain

• Citric Acid Cycle

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True or False: Only heterotrophs need to perform cellular respiration.

• True

• False

In each phase of cellular respiration there is a certain amount of chemical energy harvested in the form of ATP. On a perfect day, with everything running at 100% efficiency, how many molecules of ATP can we harvest from 1 molecule of glucose?

• 38

• 23

• 4

• 2

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When an organism is in a low oxygen situation, such as running sprints, cellular respiration ceases and the organism must use a different metabolic pathway for creating energy without oxygen. What do we call this process?

• Acidification

• Hydrolysis

• Fermentation

• Citric Acid Cycle

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During the Krebs cycle, pyruvic acid molecules are broken down to harvest 2 ATPs. What is created and released as a byproduct of that reaction?

• CO2

• H2O

• Neither of these

• Both of these

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Many electrons are excited during the first two phases of cellular respiration. These electrons hitch a ride on special electron carriers and are dropped off at the Electron Transport Chain. These electrons travel down the ETC and eventually get oxidized. Once this happens, O2 gets converted into…

• C6H12O6

• H2O

• CO2

• O2

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Which is not a waste product of cellular respiration?

• Water
• Heat
• Carbon Dioxide
• Oxygen

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The energy in ATP is stored 

• in the bond between the second and third phosphate
• in the bond between the first and second phosphate
• in the bond between the adenosine and the first phosphate
• I like turtles

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