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Sept 21 notes

by: Caitlin Notetaker

Sept 21 notes Bisc 102, Section 2

Caitlin Notetaker

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These notes cover what we learned in class September 21rst
Inquiry Into Life Human Biology
Dr. Copp
Class Notes
ATP, cells, Cellular Respiration
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This 2 page Class Notes was uploaded by Caitlin Notetaker on Wednesday September 21, 2016. The Class Notes belongs to Bisc 102, Section 2 at University of Mississippi taught by Dr. Copp in Fall 2016. Since its upload, it has received 6 views. For similar materials see Inquiry Into Life Human Biology in Biology at University of Mississippi.

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Date Created: 09/21/16
Chapter 6 How Cells Release Energy ATP ● All plants and animals and some microbes use food and oxygen to produce it ● No cell can survive without a steady supply ● Needed for active transport, separation of chromosomes during cell division,  muscle contraction, synthesis of organic molecules ● Several Pathways to produce it ○ Aerobic cellular respiration: Uses oxygen and glucose,  byproducts: CO2, water ○ Fermentation: Can generate ATP from Glucose Alone, byproduct:  lactic acid, muscle burn when there’s not enough oxygen caused by buildup of  lactic acid ● Cellular respiration is linked to breathing: Glucose and oxygen go in. byproducts  are carbon dioxide, water and energy ● 3 steps of cellular respiration ○ Glycolysis ■ Occurs outside of mitochondria ■ Does not need oxygen ■ Used in aerobic cell respiration and fermentation ○ Krebs cycle ■ Occurs inside mitochondria in matrix ■ Requires oxygen ○ Electron transport chain ■ Occurs inside mitochondria on inner membrane ■ Requires oxygen ● Mitochondria ○ Inner membrane is folded to maximize surface area ○ Can undergo many cell reactions in multiple places on membrane ○ Inner membrane loaded with transport proteins (electron transport  chain occurs here) ○ Matrix: Space inside inner membrane, where Krebs cycle occurs ○ Intermembrane compartment: Space between inner and outer  membrane ● Glycolysis ○ Occurs outside mitochondria in cytoplasm ○ Glucose and oxygen (sometimes) go in ○ Breaks glucose apart ○ Requires 2 ATP to activate glucose (to make ATP you have to  spend it) ○ Glucose is split down the middle into 2 peices and has phosphate  attached ○ Electrons from glucose transferred to NADH creates  2 ATP on  each side of the 2 molecules (leaving you with 4 ATP) ○ Net production is 2 NADH (energy storage molecules) and 2 ATP  and 2 pyruvate molecules (strands of carbon) ● Acetyl CoA Formation ○ In between Glycolysis and Krebs cycles ○ Starts Kreb cycle ○ Input : 2 pyruvates ○ Rip off 1 carbon from each pyruvate ○ Slam Coenzyme A onto double carbon molecule ○ Products: 2 Acetyl CoA, 2 CO2, 2 NADH ● Krebs cycle ○ Inside mitochondria, require oxygen and Acetyl CoA ○ Yield much more ATP than glycolysis ○ Input: Oxygen, 2 acetyl coa,  ○ Each acetyl coa= a cycle ○ Citrate created my acetyl CoA and 4 carbon molecule ○ Things get rearranged ○ Products per cycle: 3 NADH, ATP, FADH2


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