1. Glycolysis

2. The first stage of respiration Glycolysis

4. Glycolysis is the first stage of respiration!

5. Glycolysis is the first stage of respiration! Glycolysis splits one molecule of glucose into two smaller molecules of pyruvate

6. Glycolysis is the first stage of respiration! Glycolysis splits one molecule of glucose into two smaller molecules of pyruvate Glucose is a hexose (6-carbon) molecule

7. Glycolysis is the first stage of respiration! Glycolysis splits one molecule of glucose into two smaller molecules of pyruvate Glucose is a hexose (6-carbon) molecule Pyruvate is a triose (3-carbon) molecule

8. Glycolysis is the first stage of respiration! Glycolysis splits one molecule of glucose into two smaller molecules of pyruvate Glucose is a hexose (6-carbon) molecule Pyruvate is a triose (3-carbon) molecule Pyruvate is also known as pyruvic acid

15. There are TWO STAGES of GLYCOLYSIS – Phosphorylation and Oxidation

16. Glycolysis

17. Glycolysis 1 2 A B

18. Glycolysis 1 2 A B These arrows in diagrams just mean that A goes into the main reaction and is converted to B. A will normally release or collect something from molecule 1, e.g. hydrogen or phosphate

19. Stage One - Phosphorylation

24. A triose phosphate is just a simple 3-carbon sugar with a phosphate group attached. Different books use different names!

27. Stage Two - Oxidation

32. Next in Aerobic respiration….

36. The Link Reaction

37. The Link Reaction The second stage of respiration

39. You are now in the matrix of the mitochondria!

41. Link Reaction – 2 nd stage of respiration

42. Link Reaction – 2 nd stage of respiration The Link Reaction converts Pyruvate to Acetyl Coenzyme A

43. Link Reaction – 2 nd stage of respiration The Link Reaction converts Pyruvate to Acetyl Coenzyme A The link reaction happens when oxygen is available.

44. Link Reaction – 2 nd stage of respiration

48. Link Reaction – 2 nd stage of respiration 4. No ATP is produced in this reaction.

49. Link Reaction – 2 nd stage of respiration The Link reaction happens Twice for every Glucose Molecule

50. Link Reaction – 2 nd stage of respiration The Link reaction happens Twice for every Glucose Molecule So for every glucose molecule used in glycolysis, two pyruvate and two acetyl CoA molecules are made.

51. So for each glucose molecule: