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Metabolism: Glycolysis, Krebs Cycle, Electron Transport Chain

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Metabolism: Glycolysis, Krebs Cycle, Electron Transport Chain

MCAT Basics (from MedSchoolCoach)

2025/09/04

Metabolism: Glycolysis, Krebs Cycle, Electron Transport Chain

Metabolism: Glycolysis, Krebs Cycle, Electron Transport Chain

MCAT Basics (from MedSchoolCoach)

MCAT Basics (from MedSchoolCoach)

2025/09/04

Overview Shownote Highlights Transcript Chapters Pins

Shownote

In this episode, Sam Smith covers the intricacies of metabolism, focusing on glycolysis, the Krebs cycle, and the electron transport chain. First, the podcast explores the process of glycolysis, breaking down the key enzymes, intermediates, and regulatio...

Highlights

This episode dives into the core biochemical pathways that power human cells, unpacking how glucose is systematically broken down to generate usable energy.

10:17

Phosphofructokinase is the primary flux-controlling enzyme in glycolysis, inhibited by ATP and citrate and activated by AMP and fructose-2,6-bisphosphate.

14:28

Muscle soreness is due to micro-tears, not lactic acid buildup

27:32

Complex I transfers electrons from NADH to coenzyme Q and pumps four protons

30:58

Complex I transfers an electron from NADH to coenzyme Q and pumps four protons across the membrane.

41:00

Don't buy all books from every company as you likely won't finish them and they may not represent the test well

Chapters

What happens step-by-step when glucose splits into pyruvate?

00:00

How does pyruvate fuel the mitochondria—and what keeps the Krebs cycle turning?

14:28

Which enzymes in the Krebs cycle act as metabolic gatekeepers—and why do they matter?

24:16

How do electrons move through the chain to build the battery that powers ATP production?

30:58

What’s the single most effective strategy for mastering metabolism on the MCAT?

41:00

Transcript

Sam Smith: Welcome to MCAT Basics, your ultimate guide to the essential topics you need to master for the MCAT, brought to you by the physicians at MedSchoolCoach. Every week, Sam Smith breaks down high-yield MCAT topics, ensuring you're primed for success...