A scientist has found out two different species of bacteria that may have a great use in Medicine. At the scientist's laboratory, the bacteria of the specie A were grown inside the culture medium I, and the bacteria of the specie B were grown inside the culture medium II. The scientist, in order to classify the two species of bacteria as Gram negative or Gram positive, drops a certain alcohol on the culture media I and II. A certain reaction happens on the culture medium I, but nothing happened on II. After that, the scientist drops some sodium hydroxide on the both I and II. The scientist noticed that the chemical compound glycerol was produced on the culture medium I, but, once again, nothing happens on II. Which of the bacteria species is a Gram positive?
Note: consider that the amount of sodium hydroxide used wasn't enough to kill the bacteria and that this compound reacted with one of the products of the first reaction.