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This edition: Energy In - Energy Out

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Episode Details

Life is a marvelous, complex system of prolonging order, all sustained by energy. The pathways by which cells trap and use this energy are photosynthesis and aerobic respiration. Dr. Jeanne Erickson relates her research of the photosynthetic process that splits water in the chloroplast of a single-cell alga. Along the way, the program explains the roles and importance of photoautotrophs, heterotrophs, the light-dependent phase, carbon fixation, and the Calvin-Benson cycle.
Dr. Paul Saltman describes the three stages in aerobic respiration: glycolysis, Krebs cycle, and electron transport phosphorylation. He later explains another form of cellular respiration: fermentation. It is illustrated by active yeast in the beer-brewing process.