Important Points About the Krebs Cycle:

Where the Krebs Cycle / Citric Acid Cycle fits into the cellular respiration process: Glycolysis occurs in the cytosol of the cell. The 2 pyruvates made during glycolysis are converted to Acetyl CoA by enzyme pyruvate dehydrogenase. 

The NADH and FADH released from the Krebs/TCA cycle are used to pump out energy in the electron transport chain. 

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Energy producing steps (Released for every 2 Acetyl CoA: 6NADH, 2 FADH2, 2ATP): 

• Isocitrate --> alpha-ketoglutarate

• alpha-Ketoglutarate --> Succinyl-CoA

• Succinyl-CoA --> Succinate 

• Succinate --> Fumarate 

• Malate --> Oxaloacetate
   

Review Videos:

• ATP and Respiration- Hank from CrashCourse describes glycolysis through the electron transport chain in a great way if you're still learning this the first time around. Great for pre-med, biology, and other students who are still wrapping their heads around cellular respiration (but still covers enough detail to make it worth your while at any level).

• The Krebs Cycle  - NinjaNerd is the best channel for really understanding biochemical pathways and where they go wrong instead of just memorizing words. 

• Muscle Metabolism Creatine Phosphokinase (CPK), Glycolysis, TCA cycle, ETC | Physiology - Medicosis Perfectionalis is more about the biochemical pathways and how they connect. This is good for biochemistry classes, physician's assistants, and medical school
   

Other Resources: 

• Cellular Respiration - Osmosis' study guide on cellular respiration including glycolysis, the citric acid cycle, and the electron transport chain. Osmosis currently allows some access to free content (this link does not require a login or payment as of 2024), while other items are paid.