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Cell Respiration

Cell respiration is an important set of chemical processes that is found to some extent in every living cell. This unit will teach students how cells generate ATP from different sources through the reactions of glycolysis, the citric acid cycle, the electron transport chain, and finally, chemiosmosis. Alternative forms of ATP production occasionally used by cells, including lactic acid and ethanol fermentation, are also discussed.


Cell Respiration Lecture Powerpoint

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Purpose: This Powerpoint begins with the importance of ATP energy in the daily function of all cells. Students will then be taken step-by-step through the processes of glycolysis, the citric acid cycle, the electron transport chain, and chemiosmosis in the mitochondria. A full accounting of each of the atoms within glucose is given, from the carbon dioxide released by exhalation to the phosphorylation of ADP to ATP. Finally, students will learn about how lactic acid fermentation and ethanol fermentation may be used when oxygen is not available.

Essential Concepts: Cell respiration, ATP, oxygen, glucose, glycolysis, citric acid cycle, electron transport chain, chemiosmosis, mitochondria, carbon dioxide, oxidative phosphorylation, ADP, lactic acid fermentation, ethanol fermentation.


Cell Respiration Lecture Notes Outline

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Purpose: Taking efficient notes can be a big challenge for many students, especially when working from a Powerpoint lecture. This outline gives students a means to take notes that guides them toward important concepts and avoids the pitfalls of writing word-for-word or simply not taking notes at all. The outline is written as a series of questions, fill-in-the-blanks, or diagrams.

Essential Concepts: Cell respiration, ATP, oxygen, glucose, glycolysis, citric acid cycle, electron transport chain, chemiosmosis, mitochondria, carbon dioxide, oxidative phosphorylation, ADP, lactic acid fermentation, ethanol fermentation.


Yeast Fermentation Lab

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Purpose: This is a multi-part lab where students wiill first use Janus Green dye to observe mitochondria present in yeast cells, then use fermentation tubes to test the ability of the yeast to produce carbon dioxide under different conditions. Examples of variables tested include substrate (starch, glucose, etc) and the use of additives such as magnesiums ulfate and sodium fluoride.

Essential concepts: Cell respiration, ATP, mitochondria, fermentation.


Mystery of the Flea Dip Activity

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Purpose: The Mystery of the Flea Dip is a story and activity that was first published in the journal Cell Biology Education by Baines, Mevey, Rybarcyzk, and Wilkins. I've taken the activity and revised it a bit to make it a little easier to use quickly and effectively in the classrom. The activity is a story about a young girl who died after being exposed to a toxic chemical (a fictitious one) in a flea dip that she used on her dog. A set of autopsy results are used by students to determine exactly what part of cell respiration was affected and why this would have caused tissue death.

Essential Concepts: Cell respiration, ATP, oxygen, glycolylsis, citric acid cycle, chemiosmosis.


Cell Respiration Study Guide

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Purpose: This worksheet is a set of vocabulary words and practice questions meant to encourage students to condense their notes into a more manageable form to study from. The questions and vocabulary are taken directly from the lecture Powerpoint for this unit.

Essential Concepts: Cell respiration, ATP, oxygen, glucose, glycolysis, citric acid cycle, electron transport chain, chemiosmosis, mitochondria, carbon dioxide, oxidative phosphorylation, ADP, lactic acid fermentation, ethanol fermentation.


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