Question 10

 

How are organic molecules broken down by catabolic pathways? And what is the role of oxygen in energy yielding pathways? And, how do cells generate ATP in the absence of oxygen?  [Chapter 9]

 

The Processes of Cellular Respiration and Fermentation (read 160-170)

 

  1. Respiration involves glycolysis, the Krebs Cycle, and electron transport.

 

  1. Glycolysis harvests chemical energy by oxidizing glucose to pyruvate.

 

  1. The Kreb’s Cycle completes the energy harvest, by oxidizing organic molecules.

 

  1. The inner mitochondrial membrane couples electron transport to ATP synthesis.

 

  1. Cellular respiration generates many ATP molecules for each molecule of sugar oxidized.

 

  1. Related Metabolic Processes

 

  1. Fermentation enables some cells to produce ATP without the help of oxygen.

 

  1. Glycolysis and the Kreb’s Cycle connect to many other metabolic pathways.

 

  1. Feedback mechanisms control cellular respiration.

 

 

 

 

John C. Murphy

           Science

Phone:  (815) 436-3200, ext. 2120

 

jmurphy@learningcommunity202.org

 


 

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