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Lecture 34 Glycolysis

Lecture 34 Glycolysis - Biol141 Foundations in Modern...

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Biol141 Foundations in Modern Biology Cellular Biology and Genetics Lecture 34 – Wednesday, November 17 th , 2011 Glycolysis Reading: Freeman. Chapter 9. Pages 153-156.
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Learning objectives At the end of this lecture, you will be able to: 1) Compare the energy yield of cellular respiration and fermentation. 2) Describe the energy investment and energy payoffs involved in the 10-step glycolysis process. 3) Explain feedback inhibition of metabolic pathways, using the phosphofructokinase enzyme of glycolysis as an example.
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1. All organisms use glucose to build lipids and carbohydrates; cells recover glucose by breaking down these molecules. ! Glucose is used to make ATP through either cellular respiration or fermentation . ! Each of the four steps of cellular respiration consists of a series of chemical reactions, and a distinctive starting molecule and characteristic set of products. ! Cellular respiration produces ATP from a molecule with high potential energy – usually glucose.
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! Cellular respiration uses O 2 and occurs in aerobic (oxygen- containing) environments. ! Fermentation does not involve O 2 . It is an anaerobic process.
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