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.
It inhibits a protein complex called cytochrome c oxidase in the Electron Transport Chain on the mitochondrial inner membrane. This protein complex is responsible for transferring 4 electrons to one oxygen molecule and convert it into two water molecules. The Electron Transport Chain serves to maintain redox balance and establish a proton electrochemical gradient which drives the synthesis of ATP, the cell's energy currency.