Anaerobic Respiration - Glycolysis

Question 1

What happens during glycolysis in anaerobic respiration?

Answer 1

glycolysis takes place in cytoplasm - less efficient producer of ATP than aerobic resp.

NAD is needed for glycolysis and it is regenerated by reducing pyruvate

in mammals and bacteria - pyruvate converts to lactate

in yeast and plants - pyruvate reduces to ethanal to ethanol - decarboxylation

Question 2

Why is there less ATP in anaerobic respiration?

Answer 2

products lactate / ethanol not totally respired - still have chemical energy

no oxygen as the final electron receptor

no link reaction / krebs cycle / oxidative phosphorylation