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The Krebs Cycle for Dummies

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by

Sam Spencer

on 12 November 2013

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Transcript of The Krebs Cycle for Dummies

The Krebs Cycle for Dummies
Glycolysis produces 2 pyruvic acid from glucose which bond with Oxaloacetate
produces Citrate and H2O
CO2 is released to form Isocitrate
Enter NAD+ to pick up a hydrogen atom
Produces Alpha-Ketoglutarate
Kreb's Part II
The A-K acid now joins with Co-A and becomes Succinyl Co-A before shedding the Co-A while producing 1 ATP to become Succinic Acid.
Electrons are taken to become Fumaric, then Malic, and finally Oxaloacetic acid.
Oxaloacetic acid then combines with acetyl Co-A from start and the cycle begins anew.
by Sam and Chris
What is it?
The Krebs Cycle is a short name for the Citric Acid Cycle, which is the 2nd step in cellular respiration.
Takes Place after Glycolysis
Main purpose is to get rid of CO2, obtain electrons for the ETC, and generate ATP for the cell.
Lots of Big words that don't matter too much in the long-run so long as generalities are understood
Our grades depend on these big words though, so please forgive us...
Key Terms
NAD+ - A molecule used to move electrons
NADH - NAD+ after obtaining an electron
These two also have "sister molecules" FAD and FADH2 which also carry electrons.
NAD+ + 2H = NADH + H+
FAD + 2 H = FADH2
ATP - The basic cellular energy unit.
Electron Transport Chain - Takes electrons from the glucose using NAD+ and uses them to produce lots of ATP
Aerobic Vs. Anaerobic - The two differ in in whether or not oxygen is used. In aerobic respiration, far more ATP is produced while in anaerobic (also known as fermentation) far less is produced, though it is useful in times when oxygen is short.
Kreb's in a nutshell
KREB'S PART I
Full transcript