Sparse columns are ordinary columns that have an optimized storage for null values. Sparse columns reduce the space requirements for null values at the cost of more overhead to retrieve nonnull values. Consider using sparse columns when the space saved is at least 20 percent to 40 percent.
So sit back, relax and read. The purpose of the electron transport chain is harvesting the energy of the reduced coenzymes NADH and FADH2, which were formed in Glycolysis and the Kreb's cycle.Much of the free energy of these reduced coenzymes is transferred to ATP.ADH and FADH2 that have been formed so far transfer the hydrogen atom electrons they carry to a series of compounds, mainly proteins, which are associated with the inner mitochondrial membrane, called the Electron transport chain.
The purpose of kreb cycle to generate the stuff needed for ETC electron transport chaing, both FADH and NADH+H gives the H up and use it to give energy to the electron and also move it across the mitochondria membrane and make Chemiosmosis possible. Source(s): beastmaster Â· 6 years ago.