Which reaction is characterized as catabolic? glucose formation from glycerol pyruvate formation from glucose hemoglobin formation from amino acids formation of tryglyceride from glycerol and fatty acids fatty acids formation from acetyl coa?

The answer is pyruvate formation from glucose. Catabolism is the breakdown of bio molecules to smaller molecules in the body. The other choices are cases of anabolisms - which is the development of larger bio molecules from smaller molecules. Pyruvate is the product of glucose breakdown in the glycolysis. 

The teacher is mostly talking about the distillation of a mixture