Acetyl coA is a compound which helps in the transport and availability of the acetyl group to the citric acid cycle (Krebs cycle).
Though it is not an official step in the process, Acetyl CoA formation is a transition between glycolysis and krebs, and occurs only in the presence of oxygen.
The Acetyl group helps in the oxidation for energy production.
Snottite is a product of extremophilic bacteria which hang from the walls and ceilings of caves and are similar to stalactites, but have the consistency of nasal mucus.The main component of snottite is a sulphuric acid which is a waste product of bacteria.