Topic 4: Bioenergentics

• The Krebs cycle, also known as the citric acid cycle, is the second step of cellular respiration and takes place in the mitochondria.
• carbon dioxide + water --> glucose + oxygen
• 6CO2 + 6H2O -> C6H12O6 + 6O2
• Chlorophyll is a green pigment that absorbs light energy
• limiting factors of photosynthesis are light intensity, CO2 concentration and temperature
• aerobic respiration is the photosynthesis equation switched
• glucose --> lactic acid is anaerobic respiration
• fermentation is glucose --> ethanol + carbon dioxide
• an exothermic reaction which transfers energy from glucose, and is continuously occurring in living cells
• more lactic acid = more oxygen needed to get rid of it (oxygen debt)
• Inverse square law: 2x distance ➗4 light intensity
• Chloroplast- plant organelle that contains chlorophyll and is where photosynthesis happens
• Chlorophyll- green pigment in chloroplasts that absorbs light energy
• Photosynthesis takes in light energy so an endothermic reaction