Jack Westin MCAT Podcast

MCAT Metabolism Part 3: ETC & Oxidative Phosphorylation Explained


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In Episode 27, we wrap up our Metabolism series by diving into one of the most testable—and often misunderstood—topics on the MCAT: The Electron Transport Chain (ETC) and Oxidative Phosphorylation.


We cover everything you need to know for MCAT success:


🔬 What You’ll Learn:

Where ETC happens: The inner mitochondrial membrane

Complex I vs. Complex II: NADH vs. FADH₂

The secret identity of SDH (succinate dehydrogenase)

How proton gradients drive ATP production

Why uncouplers like 2,4-DNP are dangerous

Why cyanide is lethal (hint: Complex IV)

Final ATP yields from NADH and FADH₂ (30–36 total!)


📚 Pro Tip: Make sure to review Redox and Thermodynamics before watching this episode.


Next up: We'll break down alternative fuel sources—like proteins, fats, and ketones—in our upcoming non-glucose metabolism episode!


Want to learn more? Shoot us a text at 415-855-4435 or email us at [email protected]! 📱

📚 Free Resources: https://jackwestin.com

🎓 Live Education Sessions: https://jackwestin.com/sessions

👨🏻‍🏫 Courses: https://jackwestin.com/courses

🙋 Tutoring: https://jackwestin.com/services/live-online-mcat-tutoring

📸 Follow Us On Instagram: https://www.instagram.com/jackwestinmcat

👥 Join our Facebook Study Group: https://www.facebook.com/groups/freemcatprep

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Jack Westin MCAT PodcastBy Jack Westin

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