Respiration in Plants
A potato forgotten in a dark cupboard still sprouts. It has no light to make food, so where does the energy come from? Every living cell burns its food in small steps and keeps the energy in a molecule called ATP. In this chapter you follow one glucose molecule through glycolysis, the Krebs cycle and the electron transport system, count the ATP it earns, see how the same pathway also builds new molecules, and use the respiratory quotient to tell what a seed is burning. Python keeps the books of ATP.
Part of Biology · High School (11–12) (chapter 10)
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Respiration, Glycolysis and Fermentation
Do plants breathe? How a cell turns food into ATP, and how glucose is split into pyruvic acid in glycolysis. What a cell does with pyruvic acid when there is no oxygen: alcoholic and lactic acid fermentation.
The Krebs Cycle and the Electron Transport System
What happens to pyruvic acid when oxygen is present. The link reaction and the Krebs cycle in the matrix of the mitochondrion, then the electron transport system and the making of ATP on the inner membrane.