Uploaded August 2023 | Updated September 2026, 14 minutes ago

---

You can find all my A Level Biology videos fully indexed at freesciencelessons.co.uk/a-level-revision-videos/a-level-biology

In this video, we look at glycolysis, which is the first stage of respiration. I take you through the key stages of glycolysis looking at how energy can be transferred to ATP and reduced NAD. At the end, I show you the net yield of ATP and reduced NAD.