Overview
Overview ➢ Photosynthesis: reduction of CO2 . ➢ Respiration: oxidation of carbohydrate. ➢ Different: • energy transfer • enzymes • locations • cell types
Aerobic VS, Anaerobic Resp. Aerobic respiration oXgen yruvate NADH Lactate CO2 dehydrogenase NAD+k Pyruvate Lactate I decarboxylase Acetaldehyde NADH Alcoh dehydrogenase NAD Fermentation Ethanol reactions
Aerobic vs. Anaerobic Resp. ➢ Aerobic respiration = with oxygen . • Complete oxidation. • Waste products: H2O, CO2. • Energy captured for use: ~36 ATP/glucose. ➢ Anaerobic respiration = without oxygen. • Lactic acid or ethanol produced. • Energy trapped: 6 ATP
obic Resn peaction
Aerobic Resp. Reaction C6H12O6 (glucose) + 6 O2 => 6 CO2 + 6 H2O + 2870 KJ Energy ➢ The reverse of photosynthesis. ➢ Glucose is being oxidized ➢ Accompanied by the release of free energy
naerobic Resp. Reaction
• C6H12O6 => 2C2H5OH + 2CO2 + 100 KJ Energy • C6H12O6 => 2CH3CHOHCOOH + 100 KJ Energy Anaerobic Resp. Reaction
ammirati
Significance of Respiration ➢ Retrieving the energy stored in the photosynthesis, and provide energy for overall cell metabolism. ➢ Obtain carbon skeletons that are used to build other molecules required by the growth and maintenance of the cell