Chemistry
Linear Glucose, or C6H12O6, is the "open-chain", and less popular version of glucose. Mostly being associated with the dry compound, linear gluscose is not often found in water solutions. Glucose is a necessary monosaccharide found in all traces of living things. Glucose is absorbed directly into the bloodstream during the process of digestion, and then begins to break down into it's base elements. Not only is glucose the main product of photosynthesis, but it also the main ingredient required in cellular respiration in the mitochondria. People, animals, and plants alike are all dependant on glucose because it is one of the basic fuels that all living things require. Glucose can be extracted from a large varieties of food, and eventually is broke down inside the body. The reason that linear glucose is so rare is because it can so easily be transformed into the cyclic verison.
When/How was it discovered?
Glucose was first isolated in 1747 by the scientist by the name of Andres Marggraf. Using a raisan, he mangaged to extract it for the first time. About 100 years later, it was given the "glucose" by Jean Dumas, based from the greek word "glycol", which means sweet.
How its made
Glucose is the main product that comes from the process of photosynthesis. Photosynthesis is a reaction that happens in the chloroplasts of plants that requires sunlight, carbon dioxide, and water which results in glucose. This simple sugar is then passed on through the consumption of the plant, or consumption of the creature that consumed the plant, etc.