However, the brightness of a star depends on its composition and how far it is from the planet. Astronomers define star brightness in terms of apparent magnitude â how bright the star appears from Earth â and absolute magnitude â how bright the star appears at a standard distance of 32.6 light-years, or 10 parsecs.
What is the electron transport chain? A: The electron transport chain is a chemical reaction where electrons are transferred from a high-energy molecule to a low-energy molecule. These reactions can be used to convert energy from sunlight in photosynthesis or extract energy from sugars in respiration. The electron transport chain is critical to the production of adenosine triphosphate, or ATP, which is a source of energy for living things.
Best Answer: Well honey, this is a long answer. 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.