4. Energy

From the Stage 2 SACE Biology course outline, this video discusses: - Cells require inputs of suitable forms of energy, including light energy or chemical energy in complex molecules. • Distinguish between autotrophs and heterotrophs. The sun is the main source of energy for life. • Recognise that photosynthesis is important in the conversion of light energy into chemical energy, as illustrated by the following equation: - Energy transformations occur within all living cells. • Explain how most autotrophs and heterotrophs transform chemical energy for use through aerobic respiration • Explain that fermentation is an anaerobic alternative to aerobic respiration: – in plants and yeast: – in animals: • Compare the amount of energy released through aerobic respiration and fermentation (anaerobic respiration). • Recognise that energy is required to break chemical bonds and energy is released when new bonds are formed. • Describe the formation of ATP from ADP and Pi. • Explain how the conversion of ATP to ADP and Pi releases energy for some metabolic reactions.